Document n9709aod6ZYbJ6mG8bZbyKxm

FILE NAME: Phenolic Resins (PHR) DATE: 0000 DOC#: PHR027 DOCUMENT DESCRIPTION: Sales Literature from Crane, Pt. 1 FOR GENERAL SERVICES Style 814 for temperatures up to 500 F, Manu factured by twisting long fiber Canadian asbestos yarn. Strands are thoroughly impregnated with a high heat-resistant lubricant and graphited. Recommended Services: for limited cavity di mensions, such as valve stems on high pressure steam, hot or cold -water or oil. Small stuffing boxes can be conveniently packed by simply un raveling the strands to the size required. Style 815 for temperatures up to 500 F, Manu factured by braiding long fiber Canadian asbes tos yarn impregnated with a high heat-resistant lubricant. Graphited throughout. Recommended Services: all general services on valves handling high and low pressure steam, oil, water, air and ammonia. SIZES Styles 814-815 S li t F e eSttypleerBSWpool F e eSttypleer8S1p5ool WAe ipgphrtopxuimr Sapteool Style S H . Style 815 A pproxim ate Size Feet per F eet per Spool W eight per Spool 260 . lib . V vf 10 w X00 87 1 ib . Vi 43 42 51 J Ib. w w 27 38 1 Ib. w w . 17 w 13 20 1 ib . w 18 1 lb . w 13 I Ib, 46 5 lb s. 29 5 lb s. 29 5 lb s. 21 5 lb s. 18 5 lb s, Endless Plastic Ring Production Line Packings John Crane Endless Plastic Rings substantially re duce assembly time and costs. Various styles are made from combinations of asbestos, graphite lu bricants and synthetic binders. One-piece rings can be molded to exact blueprint specifications. Beveled or odd shaped rings to fit special fittings are aiso available. The highly smooth surface finish and low friction qualities al low easy operation of stems. Minimum gland ad justment is required for an effective seal, Super-Seal No, 4 is a homogeneous mixture of as bestos, mica and an oil-proof synthetic binder. It is recommended for handling edible products where the presence of graphite would be objec tionable, (See Bulletin P-390,) Super-Seal No, 6 consists of asbestos, graphite and a synthetic rubber binder. Soft and resilient, it is available in small endless production rings or in large die-formed rings. Temperature range is to 550 F, (See Bulletin P-390.) Style 172-D is made of asbestos, graphite and oilproof binder, it is for use on shutoff valves, stove cocks and low pressure automatic controls hand ling refrigerants, gas, oils and distillates. Tempera ture range is to 550 F, Style 172-DMN is of the same construction as Style 172-D, except that metal particles are added to make a harder ring for use with automatically con trolled valves. The packing is suitable for steam, oil, air, gases and petroleum distillates. Tempera ture range is to 550 F. Style 172-R consists of asbestos, graphite and a synthetic binder. It is recommended for use on globe and gate valves operating at pressures to 300 psi Temperature range is to 550 F, Send us your production line packing require ments, Our Engineering Department will supply you with samples and recommendations. '1 i CRANE PACKING COM PANY 6400 O A K f O N STREET, MORTON GROVE, ILLINOIS 6 0 0 5 3 (ChicagoSuburb) In C anada: Crane Packing Company, Lid., Box 3248, Station C, Hamilton, Ont. _ In Mexico: Industrias John Crane de Mexico, S.A. Poniente 152 679 Industrial V^lleio, Mexico, D.F. In Brazil: John Crane Industrial Comerclo, Ltda. Avenida Jurubatuba 600, Sao Bernardo do Campo, S.P. In Australia: John Crane Mauri Pty., Ltd., 166 Eldrfdge Road, Bankstown, Nevr South W ales, Australia In Europe: Crane Packing Ltd., Slough, Bucks, England . , .. , In Japan: John Crane Japan, Inc., No. 5, Tenjlnbashi-sull 6-ehome. Oyodo-Ku, O saka 531, Jap an O FF IC E S , W A R E H O U SE S A ND SER V IC E T H E W O R LD O V ER C) Printed in U .S .A . SEC. 5 P A C K IN G R IN G SETS BULLETIN NO. P-394-1 CRANE PACKING COM PANY i 6400 OAKTON STREET, MORTON GROVE, ILLINOIS 6 0 0 5 3 (Chicago Suburb) In C a n ad a: Crane Packing Company, Ltd., Box 3248, Station .Hamilton, Ont. In Mexico: Industries John Crane de Mexico, S.A. Ponlente 182 f679 Industrial Vallejo, Mexico, D.F, In Brazil: John Crane Industria E Comerclo, Ltda. Avehida Jurubatuba 600, Sao Bernardo do Campo, S.P. In Australia: John Crane Mauri Pty., Ltd.,168 Eldridge Road, Bankstown, New South Wales, Australia In Europe: Crane Packing Ltd...Slough, Bucks, England In Japan: John Crane Japan, Inc., No. 5, Tenjlnbashi-sujl 6-chome, Oyodo-ku, O saka 531, Japan O F F IC E S , W A R EH O U SES AND SER V IC E T H E W O RLD OVER John Crane Mechanical Packings are available in a wide assortment of ring sets to fit specific services and operating conditions. They offer the best possible means of assuring the proper material or combination of materials to fit the fluid being handled, the tem perature and pres- sure encountered and the mechanical require- ments of the equipment, . The sets are furnished pre-formed, pre-cut and pre-assem bied to the proper I.D., O.D., and stack height of the stuffing box dimensions, This eliminates the time and labor cost normalfy involved in forming, cutting and assembling the correct num ber of rings. It also greatly reduces the chance of error by inexperienced maintenance personnel. l i .2 . . . ' , o CENTRIFUGAL BOILER FEED PUMP PACKINGS j ) FOR HARDENED STEEL SLEEVES Style 805-MBF (illustrated above at left): Made up of accurately die-formed rings- Packing is manufactored from the purest asbestos yarn with a monel wire insert, by the braid-over-braid method. Each strand is lubricated with a special boiler feed lubricant. Recommended for stuffing boxes with or without a lantern. The presence of the monel wire requires that the pump be equipped with shafts or sieeyes of 500 Brineil hardness or over. FOR MEDIUM HARD SLEEVES Style 1033 (illustrated above at right); Recom mended for use on medium pressure centrifugal boiler feed pumps equipped with medium hard steel sleeves (270 to 500 Brined). Set is composed of die-formed rings of Styles 101 and Super-Seal Mo. 1 in a suitable assembly. (See Bulletins Nos. P -38g and P-390.) Style 101 flexible metallic rings form a low frictional metallic surface and act as pressure breakers. The graphited Super-Seal No, 1 plastic rings make the proper seal along the shaft. FOR BRONZE SLEEVES Style 1015: Recommended for use on medium or low pressure centrifugal boiler feed pumps . equipped with bronze sleeves. Set is composed of die-formed rings of Style 810 and Super-Seal No, 1 in a suitable assembly. (See Bulletins Nos, P-391 and P-390.) Super-Seal No, 1 is a dry-graphited plastic packing. o ' . When ordering sets, specify diameter of shaft, inside diameter and depth o i box. 3 t) s ) FOR STEEL PLUNGERS OR RODS Style 751 (as illustrated): Recommended for use on plunger-type boiler feed pumps where medium pressures are encountered. Reduces friction to a minimum and polishes plungers. Consists of alter nate die-formed rings of Styles 101 and 301, (See Bulletin No. P-389.) FOR BRONZE PLUNGERS OR RODS Style 820 or Style 823 Everseal "V" Packings (See Bulletin No. P-391): Recommended for use on reciprocating boiler feed pumps with bronze plungers, dependent on temperatures. Sets are composed of one adapter ring and a sufficient number of self-sealing pressure rings to fill the stuffing box. Pressure rings permit smooth opera tion of rod or plunger without leakage and reduce friction and wear to a minimum. Style 751; Recommended for use only on steel or cast-iron plungers or steel rods in good condition and running in line. Style 820; Made of duck and rubber construction for low temperatures up to 250" F. Style 823; Made of asbestos and rubber construc tion for high temperatures up to 350 F. J When ordering sets, specify diameter of shaft, inside diameter and depth of box. 4 FOR RECIPROCATING AMMONIA COMPRESSORS (Slow speed) Style 751 (Illustrated above): Made up of die* formed rings of Styles 101 and 301. (See Bulletin No, P-389,) Recommended for use on reciprocal ing ammonia compressors operating at speeds of less than 450 FPM. FOR RECIPROCATING AMMONIA COMPRESSORS (Highspeed) Style 7S1 (illustrated at right): Made up of ma chined split-babbitt rings held to the rod by coiled steel springs. Each babbitt ring Is imbedded between two properly beveled die-formed rings of Style 101, (See Bulletin P-389,) Each unit is. sep arated by a duck and rubber expansion ring. Rec ommended for reciprocating ammonia and carbon dioxide compressors where piston speeds exceed 450 FPM, FOR ROTARY AMMONIA COMPRESSORS Style 114-D: Die-formed rings of Style 111. (See Bulletin No. P-389,) Each ring is separated by oil- proof gaskets. Recommended on rotary compres sors handling ammonia, CO? and Freon, FOR AMMONIA VALVE STEMS Super-Seal No. 1 valve stem packing in spool form is recommended for refrigerants such as ammonia, Freon, CO? and methyl chloride. (See Bulletin No, P-390.) When ordering sets, specify diameter of rod or shaft, inside diameter and depth of box. RECIPROCATING PUMPS FOR OIL OVER 450 F. -- Medium Hard Steel Plungers Style 1011 (illustrated above): Consists of alternate die-formed rings of Styles 805-0 and Super-Seal No, 2, (See Bulletins Nos, P-391 and P-390,) Rec ommended for use on stainless steel, medium hard cold-roiled steel rods and plungers operating at high pressures to 1200 psi, in high temperature oil service. Used In refinery cracking pumps operat ing under severe high temperature, high pressure conditions. Packings contain only the purest asbestos yarn and asbestos fibers that are specially treated for maximum oil resistance. ! CENTRIFUGAL PUMPS FOR LIGHT OIL, GASOLINE AND NAPHTHA Style 1035 (Illustrated at right): Made up of accu rately die-formed rings of Style 101 and Super-Seal No, 3 in suitable assembly, (See Bulletins Nos, P-389 and P-390,) Recommended for centrifugal pumps where leakage must be held to a minimum, Super-Seal No, 3 rings provide the final seal. The exact number of rings of each style furnished is dependent on stuffing box design, fluid handled, pressures and type of lubrication. When ordering sets; specify sleeve diameter of shaft, inside diameter and depth of box. CENTRIFUGAL PUMPS FOR OIL OVER 450 F. --High Pressures (Hardened Steel Sleeves) Style 101-AL (illustration): Consists of accurately die-formed metallic packing rings made by spirally wrapping thin ribbons of soft annealed aluminum foil loosely about a core of pure dry asbestos rovings. Style 101-CU: Made up of accurately die-formed metallic packing rings formed by spirally wrapping thin ribbons of soft annealed copper foil loosely about a core of pure dry asbestos rovings. If desired, each ring can be separated by a gasket cut from oil-proof asbestos sheet packing. Either set is recommended for use on pumps equipped with hardened steel sleeves (500 Brineli or more). Both will withstand temperatures up to 1000 F-, pressures to 1500 psi, and speeds to 4000 RPM, Packing rings are lubricated and graphited. FOR OIL UNDER 450 F, -- Medium Pressures (Hardand Medium SSeel Sleeves) Style 101-M: Consists of accurately die-formed metallic packing rings made of continuous thin ribbons of soft babbitt foil, spirally and loosely wrapped, crinkled and folded, and squared to re- quired size. If desired, each ring can be separated by gaskets cut from oil-proof asbestos sheet packing, When ordering sets, specify diameter ot rod or plunger, inside diameter and depth o l box, EXPANSION JOINT PACKINGS FOR TEMPERATURES UP TO 850c F, Style 6-Afi/i (illustrated above): Especially developed for high temperature, high pressure expansion joints. Rings are made by braiding a jacket of pure asbestos yarn with monel wire insert over a non-metallic core of high temperature plastic. ---- ------------------ ------------------------------ Packing remains resilient and presents a low frictional wearing face, allowing joints to expand and contract freely without strain op the anchors. Recommended for expansion joints handling high pressure super-heated steam and hot gases. FOR TEMPERATURES UP TO 1200 F. Style 177-AI; Has a closely braided asbestos yarn top jacket reinforced with inconel wire. The core consists of long fiber asbestos and flake graphite to reduce friction to a minimum. Available in spools or die-formed rings. Rings are furnished with either square cross section or with special beveis for concave-convex nest sets. Recornmended for extreme service conditions in high temperature valves, soot blowers, gauge glass fit tings and similar applications. Withstands pres sures to 2000 psi. and remains resilient at tern- peratures to 1200 F. FOR STEAM AND CORROSIVE SERVICE Style CO-7: Braided of high quality white asbestos yarn impregnated with TFE (DuPont Teflon), Ideally suited for a wide range of steam, acid, alkali or solvent services, either liquid of gas. Has temperature range of --100 F. to +600 F. When ordering sets, specify sleeve diameter and inside diameter and depth of box. Printed in U.S.A. s c . I CHEMICAL P A CK IN G S I LANTERN RINGS " JOHN CRANE .. J "John Crane" ChemJon Braided Packings are recommended for ho t or cold acid, alkali, corrosive, or solvent service--regardless of the concentration --a t tem peratures from ~-120F to +5Q0F. T h e y are particularly adapted to chemical, refining, paper, food or kindred industries. Completely non toxic, they are perfectly safe for handling food products and related liquids or gases. O ther advantages are a very low coefficient of friction and sub stantially longer service life over packings fabricated from other materials. Chemlori Braided Packings are constm cted from either braided tape or fiber yarn, depending on service requirements. They assure maximum service life, since the packing remains intact, even though individual strands might wear away. Their construction provides maximum flexibility --so th a t even sm all rings can be formed w ith o u t buckling th e I.D . or distorting th e O .D .--and also provides uniform density and a sm ooth wearing surface. Types and Service Recommendations 1, Solid braided T F E tape -- for low shaft speeds or valve steins in highly corrosive service. 2, Braided, bleached T F E fiber yarn -- for higher shaft speeds in highly corrosive service. 3, Braided asbestos with either surface lubrication or complete impregnation of T F E suspensold -- for m oderate shaft speeds or valve stems in mild chemical or solvent service. Note: Although this is essentially an asbestos type packing, it provides the exceptional lubricating properties, as well as other advantages of TFE. "John Crane" Chemlon Braided Packings are available in a full range of sizes in spool, coil or ring form (see facing page). . , ' SERVICE TABLE-- CHEMLON BRAIDED PACKINGS Sendees Temperatures Services Style Temperatures Nos. CAUSTIC ALKALI ! SOLUTIONS CHLORINE LIQUID AND BROMINE CHLORINE (Gas) C-1030 C-1045 704 705 712 C-1050 120 to 500 120 to 500 - 1 0 0 lo 500 0 to 300 - 4 0 lo 400 - 1 2 0 to 500 C-1030 -1 2 0 1 0 50 C-1045 - 1 2 0 to 500 704 - 1 0 0 to 500 C-1040 + 3 2 to 350 2. fluorine-contain C-1040 ing Acids 704 706 712 + 3 2 to 350 - 1 0 0 to 500 Oto 300 - 4 0 to 400 3, All inorganic acids other than nitrating and fluorinecontaining acids C-1030 C-1040 C-1045 704 706 710 712 . C-1050 - 1 2 0 to 500 + 3 2 to 350 -120 to 5001 -10 0 to 500 . Oto 300, 0 to 125 - 4 0 to 400 --120 to 500 FOOD C-06 C:12 C-1030 C-1045 C-1050 C-60 - 1 0 0 to 500 - 1 0 0 to 600 - 1 2 0 to 500 - 1 2 0 to 500 - 1 2 0 to 500 - 1 0 0 to 600 HYDROGEN C-1030 PEROXIDE (Strong) 712 OLEUM S er concen m s) C-1030 C-1040 C-1045 710 - 1 2 0 to 500 - 4 0 to 400 -12 0 to 500 + 3 2 to 350, i -1 2 0 to 500 , Oto 125 0 I GASES (Other than Oxygen and i Halogens) ! INORGANIC ACIDS i l . Nitrating Acids C-1030 C-1045 706 C-1050 C-1030 C-1040 C-1045 710 C-1050 - 1 2 0 to 500 - 1 2 0 to 500 Oto 300 - 1 2 0 to 500 - 1 2 0 to 500 + 3 2 to 350 - 1 2 0 to 500 0 to 125 - 1 2 0 to 500 ` OXYGEN STEAM, AQUEOUS Solutions, Solvents C-1045 C-94 704 C-1030 C-1040 C-1045 C-06 C-12 C-60 C-1050 - 1 2 0 to 500 - 1 0 0 to 600 - 1 0 0 to 500 - 1 2 0 to 500 ' + 3 2 to 350 - 1 2 0 to 500 - 1 0 0 to 600 - 1 0 0 to 600 - 1 0 0 to 600 - 1 2 0 to 500 n o n , O rden mm! ipecity intended lenice IP that ipeclol preeootiom con bo token In handling anti packoglng lo axeludo organic mollar* STYLE C-06-- Braided of high quality white asbestos yam , each strand of which has first been impregnated with T F E suspensoid. This results in a dense packing that prevents permeation of gases or other va pors through the packing. Recommended for services from --100'F. to -f600*P. Ring form, Style C-07. STYLE c-12 -- Braided of dry; high quality white asbestos and externally lubricated with TFE suspensoid. A softer, more re silient packing than C-06. Recommended for steam, aqueous solutions, solvents, food services, etc. Temperature range: --100`F. to -j-6O0F. Ring form, Style C-13, STYLE C-1030 -- Braided of bleached T FE multi-filament yarn, no lubrication of any kind- This packing was developed for pump and valve application in highly cor rosive services, where soft resilient pack ings are required. Recommended for higher peripheral speeds up to 1000 FPM, Tem perature range: --120'F. to -f-500''F. Ring form, Style C-1031. STYLE C-1040 -- Braided of bleached T F E multi-filament yam and externally lub ricated with Fiuorolube. For high speed applications and highly corrosive services. Recommended temperature range: -)-32*F, to -H350sF. Ring form, Style C-I041. STYLE c-1045 -- Braided of bleached TFE multi-filament yarn and surface lubricated with T FE suspensoid, A dense packing designed for applications where other lub ricants are not acceptable. Especially suited for gases and other vapor services. Temperature range; --120F. to -f-SOO'F. Ring form, Style C-1046. Meets specification No. MIL-P-24393, STYLE C-1050 --, Braided of bleached T FE multi-filament yarn with each strand coated with a special lubricant (TFE sus pensoid) , An extremely soft resilient pack ing designed for high peripheral speeds, corrosive and gas services. Temperature range; --120'F, to -fSOO'F. Ring form, Style C-1051. Meets specification No. MIL-P-24393, .1i -'jj STYLE C-60 -- Braided of high quality white asbestos and impregnated throughout with T F E suspensoid and a special lubricant. A dense resilient packing designed especially for paper mill applications. Temperature range: -100*F. to 4-600'F. Ring form, Style C-61. Braid-over-braid Style C-58 also available. Meets specification No. MIL-P-24377. STYLE C-94 -- Braided of AAAA asbestos yarn, each strand of which has first been lubricated with T FE suspensoid. Suitable for temperatures up to -j-600*F., oxygen or other gases. Ring form, Style C-95. Styles C-994 and C-095 -- low chloride. STYLE #704 -- Braided entirely of pure TFE, no lubricant. For highly corrosive services where any type of lubricant is undesirable. Temperature range: --1005F. to -f500"F. Ring form, Style #705. STYLE #706 -- Braided of pure T F E and impregnated throughout with a special chemical resistant lubricant. Temperature range: 0 to -j-300"F, STYLE #710 -- Braided of pure T F E and impregnated with a lubricant especially suitable for use in nitrating acid services. Temperature range: 0 to -j-125F, STYLE #712 --- Braided of pure T F E and lubricated with a non-hardening, non melting lubricant. Temperature range: --10F, to +400F, ( ) Ring form, Style #707, Ring form, Stylo #711, Ring form, Style #713. NOT5S; Ail of the above styles ore available in spool or toil form from Vb" ypOn high-pressure pump applications, It is advisable to siternaie thin ff separator rings with any of the above packings. . . ] " J O H N C R A N E " C H E M L O N -- T h e B e s t in T F E P a c k i n g s * OLDED PACKINGS. "John Crane" Chemlon C-V Pacldng rings have proved to be th e closest possible approach to a universal packing. They are as well suited for valves as for reciprocating or rotating pumps and other revolving shaft applications under the m ost corrosive acid, alkali, or solvent service conditions. ^ f Chemlon C-V rings offer th e advantages of a wide operating tem perature range from -1 2 0 F .to +600 F .f plus an extremely low coefficient of friction. "Breakout" friction is only slightly higher th an " running" friction. T his friction-free characteristic prevents shaft or rod wear, promotes smoother action and increases pacldng life many times over. _ _ _ ,, A special cross section design in each pressure ring perm its positive sealing a t finger tig h t gland, pressure. Also, this design provides a void between each ring.to com pensate for th e relative high coefficient of expansion inT FE . , . Chemlon C-V rings are used in sets, th e number of rings dependent on the stuffing box length and pressures en countered. I n all cases, a minimum of two pressure rings, together with male and female adapters, is recommended. For Low Pressure Service STYLE C-VU RINGS This desig n provides o very sensitive and resilient type packing. It is particularly suited for use in control and regulator valves handling gases and fluids. ~"S ft CHEMLON AASDSAEPMTBELRY W F ALWAYS ^ GREATER THAM W el 'Z i STUFFING Z f BOX j CROSS- f SECTION | t fe ^ X^A V ii VA R-- H [ STACK : HEIGHT 1 eo% 1 OF L NOMINAL 1L RADIAL THICKNESS C-VU RING CONSTRUCTION A 5)3* Wp . 24 ` "37 38 48 41,2 m 550 551' .552 69 410 452; '41A Nominai 1.0, O.P. Vi X Vi A x Vu Vu x 'h Vi >i Vi Va x Vi Vi x Vi V** y* Vu, x 'Mi. 4 % V 1 'A Vt x A Vi x Vi Vi* Vi V* x Vi iiaiMUghi: ,050" J 00 ,100 ,12 5 .100 ,200 .2 5 0 ,13 5 J5 0 ,1 7 5 .200 ,0 74 .100 ,15 0 .200 5(3* A. 715 812 813 8 14' 814 9 13 r 914 1014 1058 1117 J 119 13 8 1220 1222 Nominai I.P . O .J), Vu x 'Vu Vi X Vi Vi x m Vi X Vi Vi X 1 Vi x % % x * Vi X 1 x 1 Vi x l'A "A x JA % x 1 Vi Vi x 1 Vi Vi x 37 Steci: height et all mele adapters is ,072", Sleek height a t nil female adapter! is some as vediti cl sross section at ring. |ilV9l>t .010" 200 ,100 .1 2 5 .1 5 0 200 .100 .1 5 0 ,15 0 .200 ,.125000 .1 5 0 ,200 .2 5 0 S ix * No. 1420 1422 1424 1424 ; 1423 1428 1824 ; 1828 ; 192? : 2030 2032 2230 Nom ino) , JIotkH sh irl Six* 1 .0 . O .P . . ? i r j No- % x 1% 7 x 1 % % x 1 55 , ,15 0 .2 0 0 M0 j 2233 2333 1 x 1% 1 X 1% r * ivi W t x 3}/i - 1 VA x 1% J J '/ l i X 1 % 1'/. X IV 1 /* x 3 .2 0 0 ,2 2 5 M0 .2 0 0 ,25 0 ,3 5 9 .2 5 0 .3 0 0 2432 2434 . 2838 ' 2849 3444 4050 4940 iVi it. l.Vr ,20 0 5044 Vomirmi I.P , O .D . )%x2 3A x , 2 A JlpdW flb.' ,019" I .350 .25 0 V/l.x 3 iV g a V /i ' PA i 2 % ]% * 2'A ! .200 ,3 0 0 - ",3 5 0 ,300 , VA x 27 ,2 5 0 . 2 1 'V x 3 ft .3 5 0 3 x ox/. MO 37 x 4 .3 5 0 u o n s - 0 In addition te the ubere ileeee rahock ace,,m m e, r ----------- ,,T (2) 4/1 rings r id/oir W con he diegenettr eat with pen knife far in,Inflation perpeie, hen ,1 ,, net deliratile or preelkel to diwstemble the reive unit, "JOHN CRANE CHEMLON -- For High Pressure Service STYLE C-VH RINGS This design incorporates a heavy wall and heel section necessary to withstand pressures up to 500 PSI and over (on pressures over 1000 P5I, metal adapters are recommended). This packing is for high pressure application, suchas found in hydraulic cylinders and pumps. W y ftm tt \ (221?;: 'p2&, i ' S320i` PI i ! W i: `I S ji-, % "* W'Ml il %' ' * v' 4* j^3i gSH tji-., laps-* v s; f lots' ' 10J9 .fif'V Wx a yj* , Vj x 1 ' , V) * V/t .&$?&* ?(* fife - S illS .-.lop. '.iso; Sop. ''r-S.'f":!'* .350 4 .200 ' - i .. - '% it. ' v' i> . .*ii.m%-w~i ; ; : :i - 1926 1928 JWj i I J334 \5>O20,203.0 2032 2036 : v A \ S y p - ' 2232 2234;, 2235 ' 38<i0, u Stock height a f oil moJe adaptors is ,072//, Stock height of oil fe/nolp odopj^fj J* same as width of cross section of ring. T h e B e s t in T F E P a c k i n g s "John Crane" Chemlon Molded and Machined Packings cover a wide range of special application requirements that cannot be handled satisfactorily by our style C-V packing ring designs shown on pages 4 and 5, All of these packings are. recommended for safe and effective handling of acids, alkalis, solvents and hydraulic fluids in any concentration at temperatures from --120F. to+SOCFF. They are available in the following general forms: 1. Molded rings of interlocking shreds of TFE -- a packing very sensitive to gland adjustment and self-compensating under gland load for minor stuffing box varia tions- 2. Molded or machined solid rings of TFE -- tough, flexible and long lasting. 3. Molded rings of sponge TFE -- a resillent packing containing tiny voids which act as reservoirs to carry lubricants. 4. Molded or machined Cup and Cone packing ring sets -- a design construction of solid TFE that is easily adjustable and affords a tight seal at low gland pressure, (See page 8.) 5. Combination sets--in which the re- . silience and easy flow o f one type is combined with the toughness of another, (See page 8.) Chemlon Molded and Machined Packings are available with square or beveled ends or in odd shapes for special fittings. They are also suited for valve discs and seats, scraper rings and similar uses. All of these packings can be impregnated with graphite or other fillers such as carbon, copper particles, calcium fluor ide, glass and molybdenum disulfide to suit unique appiica- . tions. For further particulars on filled TFE, write for our Bulletin T-127. ' * "JOHN CRANE" C H E M L O N T h e B e s t in T F E P a c k i n g s STYLE C-14--A bard endless packing ring, pro duced by forming wire-inserted asbestos yarns, lubricated with TFE suspensoid, into a very bard ring. Designed for special applications in high pressure service. STYLE C-78--An endless ring, formed by wind ing asbestos tape, lubricated with T F E susponsoid, around a mandrel and molding to size. For special applications, such as push-rod housing seals and for heat exchangers handling corrosive gases and liquids. STYLE #772--D ie-form ed, resilien t endless rings of interlocked shreds of pure TFE, con taining no binder or lubricant. Recommended for small clearance valve stems, pumps and mixer shafts. Absence of graphite insures against any corrosion on alloys having high chromium content STYLE #772-S--Endless or split rings are mold ed of pure T FE and are as homogeneous as machined TFE. Recommended for same serv ices as Style 772, but where extra-free motion is desired. Contain no special lubricants, Oder unusually long life, toughness and flexibility. Even twisting will not cause breakage. STYLE#773--Sponge T F E molded to size. Tiny voids in packings carry lubrication and pro vide resiliency with slight gland pressure. Normally used with intermediate plastic pack ing for applications where minimum friction is desirable, such as on control and regulator valves. STYLE #774--Machined from TFE rod or tub ing and made to any design or configuration, Recommended for applications where close dimensional tolerances ar rqiired, These re precision manufactured products, . STYLE #776--Die-formed endless rings of same construction, and for same services as Style 772, except that graphite impregnation gives extra lubrication. Recommended for stems and rods where throat or gland clearance is small. STYLE #776-S--Endless or split molded rings of the same construction as Style 772-S, im pregnated throughout with graphite for extra lubrication value. Recommended for the same services as Style 776, b u t where extra-free motion is desired. STYLE #793--By an additional coining process, molded Style 772-S rings are made to more precise dimensional tolerances. I t should be noted, however, that exposure to a temperature differential will return rings to their original configuration, ' jVcfe; Chemlan Molded and Machined Packing styles arc sold by Ike ring. When ordering, accurately specify stuffing box f,D ,, O.D.. depth, and beuels, i f any, Chemlon Combination Sets It is frequently desirable to combine the resilience and easy flow of one type ring packing with the toughness of another. Thus, the resiliency, sensi tivity to gland adjustment and self-compensating features of Styles 772 or 776 can be combined with the toughness, flexibility and long life of Styles 772-S or 776-S, This is achieved by arranging the above styles in various combinations. Chemlon Molded and Machined Packings can also be used in combination sets with metallic, fabric or plastic packings to meet particular service con ditions or operating requirements. When ordering combination sets, it is necessary to specify temperatures, pressures, shaft speeds, liquid or gas handled and any special operating conditions or limitations. j R A N E F, i4 Q QA'KT'QN S T R ^ iCanada! Cam tasking Cowp&n iM ea Sso ? Ifld u M ri Join Crane i .BfajtJl! Jo h n Crane Jndpeirin C i A u trs lla i lehrs C m m ffautl I' ty s E w p p s s ' Crane ffacKino Wd.< S! s Ja p a n ! Joh n Crane Japan, Inc., IPPSCBS, W A B E M O U S ge A N 1045 i ) ti, i Style C-1045 is an improved Teflon multi-filament yam packing deVel; oped apecifically for high speed- rotary services handling corrosive chemicals or solvents a t temperatures from --120F. to 500F. Through a bleaching and shrinking process prior to braiding all carbonaceous material has been removed and greater dimensional stability gained. The results are: X, Little, or no tendency for packing to burn from operational orfrictional heat, 2. Rapid response to gland adjustm ent. 3, Less swelling a t elevated operating temperatures to cause additional frictional heat. Style 0-10*15 is a firm and dense packing th a t is tightly woyen to elimi nate large voids, Bach filament or stra n d is thoroughly impregnated with Teflon dispersion before braiding. This serves as a sealant between the individual fibres to prevent any leaking through the braided structure. Also, friction on the rotating shaft is always a t a minimum, even after wear, since the packing is 100% Teflon throughout with no abrasive inorganic fillers to alter the slipperiness of Teflon, This construction provides excellent therm al characteristics. Sizes are available from Vs"to %" in Vy? increments. Sizes from H" to VV available in 1 and 5-lb, spools. 1-LB - S P O O LS 5 -LB , S P O O LS C O ILS She Approx, ft. por gpool w 79 w 35 Vi' 21 Vu" 14 Vb" 8 Vu" 6 W 5 She Appro*, ft, per spool Vb" W 319855 Va' 105 70 40 W 30 Vz 25 Size Vu" Vb" "A? Approx, ft. par lb. 3 ,7 2-7 .2.3 1 ,8 Appro*, i t per coll 14 10 10 10 Teflon* Yarn *DuPvnt trademark INTERLACED CONSTRUCTION ADVANTAGES . . . Greater, flexibility than other braided packings--because the yarns pass diagonally through the packing. Large crass section packing can be formed info small diameter rings, without buckling the I.D. or distorting the O.D. - Longer service-life--because the interlaced construction re mains intact even if individual yarns on the I.D, wear away, Uniform density throughout the packing--greater number of corner and center warps results in even distribution of yarns. Smoother wearing surface and smaller surface interstices-- the result: of tighter construction with each yarn locked into the basic; structure, . Maximum resilience--provided by the uniform construction of the packing. Less gland adjustment--the flexibility and density of inter laced! construction provides longer service with less attention, - 1 ' ... KEEP SHAFTS COOL, SEALS TIGHT, WITH "TEFLON" FIBER Picking the night peeking to. almost any kind of service conditions is now an easy task ...If you ese new, white fiber packings of "Teflon" TFi-fluoroearbon resrns. H ere's an improved braided packing-m ade completely from "Teflon"--with a preshrunk yarn of "Teflon" fiber, specially treated to remove temperature-raising contaminants. And its impregnated with 35 per cent by weight of T F E dispersion to better the seal and simplify break-in, without need for supplemental lubrication, . What's been happening in packings--Long processed into packings, "Teflon" resins are used in solid rings and braided fiber, with or without fillers to vary mechanical properties, and also by themselves as a filler for packing materials like asbestos, . The "Teflon" fiber is different from other TFE resin struc tures because the molecular orientation of the fibers gives them greater mechanical strength. For instance, the Teflon fiber can withstand compressive forces up to 60,000 psi, without significant cold flow or extrusion. In all other respects it has those qualities which make "Teflon" virtually inde structible and so attractive to the design engineer: chemical inertness, thermal resistance, and very low coefficient of friction, . The original braided packing of "Teflon" fiber was brown in color, and worked well enough for valve stem and low speed pump service. But despite precautions taken during installation and run-in, packings burned out with dismaying frequency at higher speeds. After further development, these restrictions were over come by revised fiber processing, so that an improved pack ing material is now available on a commercial basis; Braided "Teflon" fiber pocking, impregnated with dispersion of Teflon resin, has that cool, white leak. Removal of heat-generating part'd* means higher speed uses; added resin improves seal, reduces leakage. Pre-shrinking and bleaching--To allow cooler shaft opera tion, the fibers are pre-shrunk before braiding. This mini mizes swellings of the braid in the packing gland and hence decreases frictional heat because the fiber shrinkage is elim inated in the process, , Similarly, bleaching the yarn removes carbonaceous im purities--another potential source of heat through oxidation. Impregnation with TFE resin dispersion--Up to 35 per cent of TFE resin has been impregnated in the braid for a tighter seal. The dispersed resin fills in voids between fibers and im proves the shaft seal. This added resin also simplifies run-in. since it enhances the sealing qualities of this new packing. Where to use new braided packing--Install new packing of impregnated, braided "Teflon" just about anywhere you want perfect seals and cooler running shafts, even at high speeds. Table l lists numerous pumps and valves profitably packed with braided TFE fiber, Note that besides ordinary high speed rotary and reciprocal applications, special designs work well too, such as the floating heads in a heat exchanger. , Premium price, premium savings--It's axiomatic that ex pected performance can be measured in price paid, but don't let this fool you when dealing with fiber packings. Often, maintenance expenses alone will justify all-fiber packings. They've been known to last over ten times as long as many materials formerly used. Many pumping situations, for example, present challeng ing problems. On the 9 pieces of equipment shown in Table 1, for instance, a total savings of $2,000,00 has been realized to date. In all these cases, "Teflon" fiber packings have proven to be a sound investment, for the cost-minded engineer. Some new design-- "Teflon" fiber yarns are opening up new packaging possibilities. For minimum leakage why-not investigate combination packings? Strong sintered Teflon rings on both ends of the set and sandwiched between the resilient rings of fiber is an example, ,, . . Combination packings can be used to create, a labyrinth seal (See Fig, l) to permit sealing at much lower gland pres sures. The sintered "Teflon" rings can be furnished with many different fillers to prevent cold flow, decrease friction or prevent fiber ring extrusion. The use o f a combination set results in decreased wear, increased packing life and best of a ll-lo w e r leakage rales. Review run-in procedure -- When properly installed, this new bleached, impregnated, braided packing of "Teflon' fiber will go a long way toward giving smooth, cool, and trouble-free service in many applications. Whichever type of packing design you choose, be sure to follow the proper break-in procedure, such as the one shown below: Before installing, check shaft alignment and surface finish. Avoid shaft runouts over 0,005 in, #. , Packing may be butt or diagonal cut. Stagger joints in successive rings at least 90", Table i--Typieal Case Histories: "Teflon" Fiber Packing Equipment (tan Service Operating Conditions Results Pump (Miltofi Boy "Constanictric'') Hydrocarbon solvents, metal alkyls, metal halides 5/16-in, piston dia.; 4-12 strokes/min.; 1,000 psi.;77T. Braidedpackingof"Teflon"TFEfiberimpregnated withTFEresin; isstill operating satisfactorily after 1!4 yrs, Previous packings lasted 2 to 6 mos. Compressor (Worthington piston type) Anhydrous ammonia (Moisture content 5% or less) 2V4-in. shaft; 7-in. stroke; (610 fpm.); 8 psi.; 6 rings 8raided packingof "Teflon" TFEfiberstill inservice without leakageafter 4mos,; "V" rings-molded from shredded lead toil failed after 1-2 mos. Heat exchanger (toting tod) Autoclave (agitator shaft) High pressure steam 200 psi.;%-in, packing; 6 rings Braided packingof 'Teflon" TFEfiber eliminated leaks in heat exchanger used to vaporize nitro bodies, and is still operating after 1 yr. seryice. Previous packing failed after 2 mos. Formaldehyde, sodium hydroxide, hydrochloric acid, acetic acid 4-in. shaft; 100 rpm, (100 fpm.); 221F,; %-in. packing; 15 rings Braided packingof "Teflon" TFEfiber impregnated withTFEresin still operating satisfactorily after 11 mos. service despite excessive run-out of shaft. Best life obtained from previous packing was 3 mos. Centrifugal pump (La Boer PL-20) Mixed acids; 90% cone, nitric and 35% cone, sulfuric acids l*/a-in. shaft; 1750 rpm. (515 fpm.); %-in. packing; 6 rings Packingset consistingof braided ringsof "Teflon" TFEfiber alternated with rings of soft "Teflon" resin; was still operating satisfactorily after 6 wks, of no-leakage service. Previous packing lasted only 1 wk. Centrifugal pump (Ourireo HSeries: throttle hushing) Orfho-dichlorpbenzene 2J/B-in. shaft; 1750 rpm, (975 fpm,); 150 psi,; 5l8F, Braidedpackingof 'Teflon" TFEfiberusedas throttlebushingtomaintain positive pressure on mechanical seal; still operating satisfactorily after 7 mos. Carbon bushing lasted 2 mos. Agitator shaft (in fusion tattle) Caustic solution 4-in. shaft; 158 rpm. (165 fpm.); 432^,; 6 rings of 5/j-ifi. packing; 40 psi. Previously used packing lasted 1 mo., but braided TFE fiber packing lasted 6 mos. without lubrication. Agitator shaft On solvent still) Organic solvents 4-7/16-in. shaft; 45 rpm. (52 fpm,); 212T; %-in, packing; 30 psi. Previously used packing replaced every 2 mos., yet never completely contained solvent fumes. Packingof braided TFEheld 8 mos, without leakage. Agitator shaft 0a solfonator) Sulfuric acid and bromine 2-15/16-in. shaft; 60 rpm. (45 fpm,); IS4F.; %-m. packing; 50 psi. Center bearing shaft froze each time drive shut down; repacked twice weekly. Braided packingof TFEstill Inserviceafter 2 mos. Tamp rings very firmly in place in stuffing box. * Tighten gland nuts before starting pump to squeeze im pregnated dispersion into voids; back off until nuts are just fingertight and shaft turns freely. (Spring-loaded gland fol lowers will help keep uniform pressure on packing.) Start pump and let it run for 10 to 15 min.; let pump leak about 50 to 100 drops/min, during run-in. If leakage slows down, loosen gland nuts to keep leak rate constant, * Gland temperature will level off, and then drop slightly when run-in is complete. Now draw up the gland nuts about 1/6 turn every 5 min. until leakage is minimized. If gland heats up too much (viz., will boil water) back off gland nuts and repeat run-in until temperature stays down after gland nuts are re-tightened. Fig, 1-- Combination Packing with Labyrinth Seal E L , \V\\Vv vvxy'vv'vitVUxx vv GLAND SHAFT /v 'V /T` >* /tv 'f* Sintered Teflon Rings John Crane 774 ResilientPackingofTeflon FiberJohn CraneC-ltMif 4/ >1? ; GLAND FOLLOWER yy iy\N x\v :5 Excerpted with permission of the DuPont Company from their copyrighted article in the " Journo! of Teflon/' Heat-Resistant Multi-Filament Aon* Yam *DuPont trademark Style C-1030 is a soft multi-filament y am braided packing th at has exceptional thermal and oxidative stability. It contains 30% Teflon dispersion on the yarns and a special heat resistant lubricant which is applied to the yarns before braiding. This results in a packing that: 1, Does not retain heat, especially during the break-in period, 2, Reacts faster to gland adjustm ent. 3, Has greater resiliency than has been previously possible with this type of packing. . In addition, th e clear and colorless lubricant combines w ith Teflon's outstanding inertness and non-toxic properties. This makes Style C-1050 ideal for food handling and processing equipm ent as well as concentrated acid service a t tem peratures from -1 2 0 to 4-500 F , Sizes are available from H" to %" in Y Y increments. Sizes from YY to W available in 1 and 5-lb, spools. 1-LB , SPO O LS Size Apprex, ft, per spent Vs* 78 Vu* W 34 XI %Va'` 14 a V" 6 w 5 S-LB S P O O LS Size Appro*/ ft, per swat /* 390 Vit" 170 Vs* 105 w 70 %* 40 w 30 w 25 C O ILS Size Approx, Appro, ft, per II?, ft, per coil 3,7 14 %U 2 .7 10 2 ,3 10 1 ,8 10 INTERLACED CONSTRUCTION ADVANTAGES Greater flexibility than other braided packings---because the yarns pass diagonally through the packing, large cross section packing can be formed Info small diameter rings without buckling the I.D. or distorting the O.D. Longer service-life--because the interlaced construction re mains intact even if individual yarns on the 1.0, wear away. Uniform density throughout the packing--greater number of corner and center warps results in even distribution of yarns. Smoother wearing surface and smaller surface interstices-- the result of tighter construction with each yarn lacked into the basic structure. Maximum resilience--provided fay the uniform construction of the packing. . Less gland adjustment--the flexibility and density of inter laced construction provides longer service with less attention. SPOOLS Style 1625GF is a severe service packing that is ideal for the most difficult fluid handling applications in the chemical, petrochemical and related industries. It is impervious to the most destructive acids, corrosives, alkalis and caustic solutions and will withstand extreme temperatures over 1000 F. in the stuffing box. Made from a special graphite filament yarn, Style 1625GF packing is inherently self-lubricating and has exceptional heat dissipation characteristics. This permits a tight packing adjustment to make leakage almost nonexistent, yet assures maximum protection against shaft scoring. The results are: (1) greatly reduced loss of costly fluids; (2) less maintenance and downtime; and {3) longer equipment life, Style 1625GF is recommended for use in centrifugal, reciprocating and rotary pumps, boiler feed pumps, mixers, agitators, dryers and blowers, also for valve stem s, A complete range of sizes is available from Vs" to 1" in spools and 'A" to 7A" in die-formed rings, both in increments of Mi", CRANE PACKING COMPANY 6 4 0 0 O A K T Q N S T R E E T , M O R T O N G R O V E , IL L IN O IS 6 0 0 5 3 (C nlejao iu h u ru ) i n G nm si-C m r, PurMta Comppray, I ,- Bor'm fy.S M tati fe, Mnffllltcm; Out, ' . In Mw Iko; IrrdsubMB John Cisne il* M ariai, S A , - Pwiimiit; 1S2twit InrtnsIrMI Vullojo, Mii/loo, O.F. 1 (rraartlr t, JniiiV - Avtinirt.i Jiirhtubn600i tlo Csrnnti. S.P. . - ; In Awtralm: John C m e M m it P ., Uh-, 161 fM lt m Rina, Sf-mMmn, tien SatiilJ W S s , _ insKTropB;: Gram, Pittfcwr, Utf,, Stonnfl, BUcKittEdfllaiiil . .. - _ 'In Jupsn: John Cm b Japan, In n , Wo, , Ton|lnbasHiSw/| H-'chncho, OVoilo-H, Osait Mi, Jepa'n CWiFlCTiri, WAWFMOUSf MO EriVICIs T H e WORL.O OVlsll . D ISTRIBUTED! BY: Printed In U , S . A .  last Much longer In A ny Service e Corrosion Resistant Will Not Score Shaft Easily installed John Crane Chemloy Lantern Rings will outlast metal rings many times over in all services, particularly the most destruc tive chemicals, corrosives and alkalis. Made from a special filled TFE material, this combination results in exceptional strength plus wear resistance and will not bend or collapse under extreme gland pressures. Another advantage of Chemloy Lantern Rings is that they will not score the shaft regardless of high and continuous operating speeds. Half sections or split rings make installation fast and easy in shop or field without disassembling the pump or equipment. Solid rings are generally used by equipment manufacturers. Sizes are available for all standard shaft diameters and stuffing box bores. When ordering for pumps or other equip ment simply state the shaft or sleeve diameter and stuffing box bore. form No. 1 CRANE PACKING COMPANY 6 4 0 0 O A K T O N S T R E E T , M O R T O N G R O V E , IL L IN O IS 6 0 0 5 3 (Chicago Suburb) In Canada: Crane PacWnp Company, Lid., Box 3248, Station C. Hamilton, On!. In M exico: Induairios John Crane da Mexico, S .A . * Ponlenle 152 `879 industrial Vallejo, Mexico, O.F. In B razil: John Crane industrfa E Comorclo, Ltda. Avonida Jurubotuba 600. S ao Bernardo do Cam po, S .P . ............... In Australia: John Crane Mauri Pty.f Lid., 160 Bdridflo Road. Bankstown, New South Wales, A ustralia In Europo: Crane Pitching Ltd., Slough, Bucks, England In J a p a n ; J o h n C ran e J a p a n . Inc* Mo. 5, Tenjlnbnuhl-suJI 6-ehom e, Oyodo-Ku, O sak a 631. J a p a n OPPICES,y/ABHOU8E3 ANDSERVICETHEWORLDOVER Prinifid ln U.S/A, / 47-C' 1I C D EN S ER TUBE P A C K IN G S FITTINGS ND PROTECTORS BULLETIN NO. P-393-1 PACKINGS AND ACCESSORIES CRANE PACKING COM PANY 6400 OAKTON STREET, MORTON OROVE, ILLINOIS 6 0 05 3 (Chicago Suburb) In Canada: Crane Packing Company, Lid., Box 3248, Station C, Hamilton, Ont. In Mexico: Industries John Crane de Mexico. S.A. Ponlente 152 f679 Industrial Vallejo. Mexico. D.F. In Brazil: John Crane Induatrla E Comerclo, Ltda. Avenlda Jurubaluba 600. Sao Bernardo do Campo, S.P. In Australia: John Crane Mauri Pty.. Ltd.. 166 Eldrldge Road. Bankstown, New South Wales. Australia In Europe: Crane Packing Ltd., Slough. Bucks, England ................... ....... .................... In Japan: John Crane Japan, Inc., No. 5, Teniinbashl-suji 6-chome. Oyodo-hu, O saka 631. Japan O F F IC E S , W A R E H O U SE S A ND SER V IC E T H E W O RLD O V ER . Condenser Tube Packings Style 602 Style 601-E Style 603 Style 601-E Endless Metallic Rings are manufac tured by wrapping narrow ribbons of babbitt foil concentrically around a mandrel of desired size and compressing endwise in a die. Rings of this construction flow easily and compress inwardly around the condenser tube and outwardly into the drilling threads without rupture of the metal. They are not affected by operating temperatures or chemicals used for cleaning and provide a perfect seal and metallic bond between the tube and the tube sheet. Rings are available for all tube sizes and tube sheet drillings. Style 602 Fiber Rings are cut from vulcanized fiber tubing and accurately machined. They are finished smooth and are free from burrs. This ma terial is especially adapted to condenser service and is not affected by operating temperatures, polluted circulating waters or normal cleaning solutions. Rings are available for all tube sizes and sheet drillings. Sizes Va", %t" and 14" can be furnished from stock. Style 603 Lead Slugged Fiber Bushings are manu factured from the same tubing stock as Style 602, Each bushing has a lead slug that serves as a metallic bond between the tube and the tube sheet. The bushings are not affected by operating tem peratures or chemical solutions used for tube cleaning. They can be accurately finished to any required size. high tem pera tu re Heater Tube Packings Style 601-ECA Endless Copper and Asbestos Rings are manufactured by wrapping narrow rib bons of copper foil and asbestos tape around a mandrel of desired size and compressing endwise in a die. This results in an endless metallic ring with interlocking folds of copper ribbon suitable for further endwise compression with the caulking tool. Each ring is treated and graphited. Rings of this construction flow easily to compress inwardly around the condenser tube and outwardly into the drilling threads without rupture to the metal, installed two rings to the stuffing box and used with a check ferrule, they make a tight seal under the most extreme operating conditions. Style C-78 Endless rings die-formed asbestos and a TFE dispersion for use in condenser and air ejector service where temperature exceeds 250 F, These rings are especially effective where op erating conditions, cleaning solutions or chemical additives adversely affect the sealing ability of standard fiber rings,' In high temperature applications, such as heat exchangers and condensers, it is recommended that Style C-78 be used in combination with Style 601-ECA for best sealing results, ' Rings are available for all tube sizes and sheet drillings. Recommended Services; Radial-jet inter-after con- J densers, vapor condensers, heat exchangers, oil heaters and other heater tube equipment where the packing is exposed to the full temperature of the steam or high temperature gases. 3 .J TWO STANDARD M ETHODS FOR PACKING CONDENSER TUBES WITHOUT FERRULES METHOD FOB PACKING NEW CONDENSERS INLET END--Tube rolled into sheet and .belled, (See Fig. A.) OUTLET END--Tube packed with John Crane Endless Metallic Rings. (See Figs, F through J.) Advantages; (1) no ferrules required; (2) inlet end fixed; (3) outlet end metallic packed; (4) tube free to move; (5) increased packing depth; (6) flush tube sheet; (7) less turbulence; (8) tubes cleaned easier; (9) rapid installation; (10) perfect bonding; and (11) improved condenser performance. METHOD FOR PACKING OLD CONDENSERS INLET END--Tube packed with John Crane Lead Slugged Fiber Bushings and belled, (See Figs. B through E.) OUTLET END--Tube packed with John Crane Metallic Packing, (See Figs, F through J above.) Advantages; (1) no ferruies required; (2) rapid installation; (3) inlet end fixed; (4) outlet end metailic packed; (5) tube free to move; (6) increased packing depth; (7) flush tube sheet; (8) less turbulence; (9) tubes cleaned easier; (10) perfect bonding; and (11) improved condenser performance. INLET END NEW CONDENSERS FIG. A. inlet end rolled Into th tube sheet and helled. OLD CONDENSERS FIG. 8. Load slugged fiber bushing on loading pin. F)G. C. lead slugged fiber bushing driven into place. '/jugg I KffiHEgiB EfEgga 8 cgggg222j9B| I pproH n cWSSsHB fHSSWI FIG, D. Selling tool entering tube. FiG. , Belling tool flaring tube and locking bushing info threads, Finished inlet end. Tube flush with tube sheet. OUTLET END NEW AND OLD CONDENSERS FIG, F- First expansion ring on loading pin with caulking tool. FiG. H, Second expansion ring ready to be caulked into place. . FIG, J. Second metallic ring ready to be caulked Into place. Finished Outlet completed stuffing box. Packing locked In position, Condenser Tube Packings 1 ADVANTAGES OF JOHN CRANE CONDENSER TUBE PACKING Eliminate Costly Ferrules Permit Expansion And Contraction Of Tubes Bond Tubes To Sheets To Reduce Electrolytic Disintegration Of Ends Prevent Deformation Of Tube Ends Caused By Extreme Ferrule Pressure 0 Not Affected By Contaminated Or Chemically Treated Water Last For Life Of Tubes Condenser Tube Packing Tools PL AIN TUB S DRIVING TO O L l-I 3 = -4 -^ UNIVERSAL TUBE DRIVING TO O L For driving tu b e s o u t of tu b e sh e e t. Fits % " through 1" tu b es. si. HAND INSERTION TO O L LOADING PIN BELLING TO O L REMOVAL TOOL C utters rem ove m etallic o r fiber packing w ithout disturbing th e tu b e. ............. ...... T r I STANDARD FERRULE W RENCH ! p a c k in g EXTRACTOR TOOL For u se w hen the tu b e h as b e e n rem oved. D rives into the packing for easy ex tractio n sim ply by tu rn in g th e tool in a coun ter-clo ck w ise direction, 5 SLOTLESS FERRULE WRENCH R eq u ires only a slight turn of th e b ack h an d le to grip slo tless ferrule tightly. F errule is tightened o r re le a se d by turning th e la rg e h a n d le in th e usual m anner. !D I Super-Jet CondenserTube Cleaner a For w ater operation F or air operation: eltcctive p re ssu re 50-200 psl, etfeclive p re ssu re 50-200 psi The Superset Condenser Tube Cleaner provides the fastest, sim plest and most effective method for maintaining maximum heat transfer efficiency in steam condensers. This handy gun-and-slug method thoroughly removes slime or scale in much less time than other mechanical tools to substantially reduce labor and down time. Versatile--Interchangeable slugs are designed for positive clean ing under practically all conditions: 1, Spool-type for normal slime removal is designed with a cup at the forward end which expands to wipe the inside of the tube clean, 2, BulSet-shaped slug removes heavier or thick slime deposits, 3, Scraper-type slug cuts away scale or mineral deposits as it is driven through tube. Latter two slugs have "jet action" holes in side wall that admit water or air to flush away deposits as they are removed. Fast--One man can quickly load an entire bank of tubes with the cleaning slugs and then shoot them through in rapid succession. Economical--Slugs can be used over and over again. Gun is rug gedly built for long and heavy-duty service. There Is no danger of cutting or gouging inside of tubes. Interchangeable nozzles permit use with either water or air. Easy--The lightweight gun weighs only 2% lbs. An operator can use ft for lengthy periods without fatigue. INTERCHANGEABLE SLUGS B ullet-shaped for heavy or S c r a p e r - t y p e for s c a l e a n d mineral d e p o s its . Printed in U .S .A Plastic Condenser and Heat Exchanger Tube Protectors NYLON POLYPROPYLENE TFE C R A N E PA C K IN G C O M PA N Y 64-00 OAKTON STREET, MORTON GROVE, ILLINOIS 6 0 0 5 3 (Chicago Suburb) In Canada: Crane Packing Company, Ltd., Box 3248, Station C, Hamilton, Ont. _ _ In Mexico: Industrlas John Crane da Mexico, S.A. Poniente 132 679 Industrial Valleio, Mexico, D.F. In Brazil: John Crane Industria E Comerclo, Ltda. Avenida Jurubatuba 600, Sao Bernardo do Campo, S.P. In Australia: John Crane Mauri Pty., Ltd., 165 Eidrldge Road, Bankatown, New South Wales, Australia In Europe: Crane Packing Ltd., Slough, Bucks, England ^ In Jap an : John Crane Japan, Inc.. No. 5, Tenjinbashi-sujl 6-chome, Oyodo-ku. O saka 531. Jap an O FFICES, W AREHOUSES AND SERVICE TH E W O RLD OVER EA SY TO IN S TA LL I . Nylon end Polypropylene Protectors: A, Cleon tube and allow to dry, lightly coot outer surface of tube protector with John Crane Tube Protector Cement (see back page). Stroke in direction of straight end to within W fo '/j" of edge, ' B, Pish protector Info tube with light) ' steady pressure, ~ TPE Protectors: . John Crane TFETube Protectors are manufactured so as to press fit in the end of the tube. Just push into tube with light* steady pressure. EXCLUSIVE JO H N CRANE S M O O TH FLO W DESIGN Inner wall of protector gradually tapers toward the: discharge end to provide the thinnest possible wall at that point. Also, absence of outside flash assures maximum contact with tube I.D. This pro vides smooth wafer flow, eliminating turbulence' and pressure drop-off. r"' SAVE THOUSANDS OF DOLLARS ANNUALLY IN SURFACE CONDENSER AND HEAT EXCHANGER MAINTENANCE AND REPLACEMENT COSTS WIDELY USED IN MARINE, UTILITY and INDUSTRIAL POWER PLANTS . , . EQUALLY EFFECTIVE IN CHEMICAL PLANTS, REFINERIES AND GAS COMPRESSOR STA T/ONS NEW TU BES STAY THAT WAY JOHN CRANE PLASTiC TUBE PROTECTORS offer permanent protection for new tubes or extended life for old tubes already pitted or thinned at the entrance section. Their low unit cost is a small price to pay for the major econ omies they assure through protection of the first few inches of the tube inlet. That area is very vulnerable to a number of erosive elements such as: (1) the abrasive action of sand-, silt or other foreign particles entrained in the fluid, (2) air impingement caused by the release of oxygen due to turbulence when fluid enters the tube. The flared end of the protector is designed to give a smooth venturi entrance for the fluid and the polished inner surface will not foul up or hold scale formation. Once installed they need never be replaced, since they are more resistant to abrasion and erosion than the tube metal itself. AVAILABLE IN THREE PLASTICS--John Crane Tube Pro tectors offer a choice of nylon, polypropylene or TFE, Nylon and polypropylene types are resistant to chem ical, corrosive and fungus attack and are not affected by oils or greases. They will withstand temperatures to 250F, TFE protectors are im pervious to the m ost destructive chemicals, corrosives and alkalis at temper atures up to oGO'F. SIZES; Tube She .Nylofl P rotector Length P e iy p re p y le n o % " * 18 B W G % " * 16 " % "x18 " %" x U " % " x 18 " 1" x IS " 1"x16 " 1 " x 14 " 1 " x 10 ' 2" x 8 " 6" b" A" U 6" 6" b" 6" 6" -- . _ 4" 6" 6" 4" a 6" 6" 6" 6" 6" _r A" Note: Other sizes can he made to order. TP6 A" & b" 6" A" & 6" A" & 6" A" & 6" A" & 6" A" & 6" 6" A" & 6" -- OLD TU BES GAIN NEW LIFE JO H N CRANE ROTARY EX PA N D IN G TUBE END CLEANER TheJohn Crane Cleanerhas been specifically developed for old tube installations. It has a special cutting blade that deans salt de posits, scale, etc. from the portion of fee tube end to be covered by the tube protector. It is designed so it cannot pass beyond this area. The adapter end of the cleaner is threaded to 7/32"--24 U,S,E. gauge and will fit any small motor used for cleaning boiler tubes either direct or by using a flexible shaft. r------- i inf1', JO H N CRANE PROTECTOR TUBE CEMENT Cementing of nylon and polypropylene j tube protectors is recommended to pre- I vent their working out during backwash a and cleaning operations, | Cement is easily applied with a small brush (see page 2), It bonds in seconds and f dries to M l strength in a very short time, f Available in y i pint cans, 1 Cementing of TFE protectora is not f required, as they are made to a press fit. \ x If it becomes necessary to remove a protector, or protectors, this can be readily accomplished by means of John Crane Protector Tube Extractors. They are especially designed to cut fee protector free without damaging fee tube metal. Any cement remaining in the tube can be removed wife fee rotary expanding cleaner above.' Crane Packing Company also manufactures a compiete Une of j Expanding Tools and Condenser Tube Cleaners *Cranc Packing C om pany tradem ark Printed in U. S, A , Form No, P-313 kk-kk-kk-kk-k-k k k k k k A, D E PT H O P D RILLIN G -------------------- :------ - B, D IA M ETER O F C O U N TER B O R E --------------------------- -- C , D E P T H O F T A P P I N G ------------------------- -- D, O U TSID E D IA M ETER AND GAUGE OF TUBS ---------------------------- E , N U M B E R O F T H R E A D S P E R IN C H --------------------- -- CO N D EN SER M A N U FA CTU RER AND SER IA L NUM BER NU M BER O F T U B E S IN U N IT ARE BOTH T U B E SH EETS D R ILLED AND T A P P E D A R E T U B E S F L U S H W ITH F A C E O F SHEET OR EXTENDED -- -------- ---------------------- ----------------- ------------------ :-- ARE T U B E S MEW, N E C K E D OR D EFO RM ED ----------------- ---------- IN TEN D USING F E R R U L E S _ _ _ _ _ -------------- W HAT C O N D IT IO N A R E F E R R U L E S IN _ _ -- ,-- _ -- .-- S H A L L WE F U R N IS H T O O L S -------------------- -- NAME O F ENGINEER PATE WAMS, STREET ADDRESS. J T Y . Prlnted in U ,5 ,A # ' ' > MECHANICAL PACKING DIVISION CRANE p a c k i n g c o m p a n y ; 6400--OAKT-Q-N: STREET MORTON GROVE, I I U N O IS , HYDRAULIC PACKINGS V-RING PACKINGS V V-RING PACKINGS GENERAL INFORMATION Jo h n C ra n e V-Ring P ack in g s a re d e s ig n e d for versatility, reli ability, long life a n d low friction lo a d s in virtually all ty p e s of recip ro catin g m otion ap p licatio n s. T h e se include rod and p isto n s e a ls in h ydraulic an d p n e u m a tic cy linders, p re ss ram s, ja c k s a n d s e a ls o n p lu n g e rs a n d p is to n s In r e c ip ro c a tin g pum ps. T hey are also readily su ited to certain siow rotary a p p lic a tio n s s u c h a s v a lv e s t e m s . A v a ila b le in a large s e l e c t i o n o f m a te ria ls a n d d e sig n s, J o h n C ra n e V -Ring P ack in g s c o v e r all o p e ra tin g co n d itio n s e n c o u n te re d in th e fluid p o w er in d u stry , M ATERIALS T h e w ide variety of m aterials m ay b e g en erally classified info th ree categ o ries; hom ogeneous ru b b ers, fabrics and C hem - lon (TFE). ' E a c h c a te g o r y o f m a te ria l (lias c h a r a c t e r i s t i c s th a t m a k e it esp ecially su ited for certain o p eratin g conditions. In m any in sta n c e s, V -R ings of differen t m a te ria ls c a n b e u se d in a s e t com bination to gain the b e st ad v an tag es of each , , HOMOGENEOUS RUBBERS T h ese can b e furnished to h an d le a ran g e of operating co n d itio n s fro m very low p re ss u re s to relatively h igh p re s s u re a p p lic a tio n s. M a terials th a t will h a n d le te m p e ra tu re s from su b zero to elev ated conditions a re available. T he ch aracteristics o f th e ru b b e r m aterial, itself, p ro v id es a se a! th at is se n sitiv e to low p re s s u re differentials, F A B R IC S F ab ric p ack in g s a re usually co n sid e re d a s the heav y duty type m ad e to resist h ig h er p re ssu re s an d tough se rv ice c o n d itio n s s u c h a s m obile: a n d mill ty p e h y d ra u lic c y lin d e rs a n d recip ro catin g pum p applications, M aterials a re available td h a n d le a v a rie ty of fluids a n d te m p e ra tu re s. In m a n y s e r v ic e s , ia b rie V -R ings a r e o fte n u s e d in c o m b in a tio n w ith o n e o r m o re h o m o g e n e o u s ru b b e r V -R ings to o b tain th e b e s t q u ality o f both. F ab ric V -R ings, b e c a u s e of th eir fibrous m ake-up, ten d to resist extrusion. T he addition of h o m o g e n e o u s V -R ings to th e s e t p ro v id e fo r a m o re se n sitiv e se a l, C h e m lo n (TFE) V-Ring p a c k in g s c a n b e m a n u fa c tu re d in dif fe re n t w ay s, e a c h resu ltin g in a p ro d u c t w ith individual c h a r acteristics, B ecau se of th e chem ical in ertn ess of this m aterial, it p ro v id es th e solution to difficult a n d ex trem e ch em ical a n d te m p e ra tu re o p e ra tin g c o n d itio n s th a t c a n n o t be h a n d le d w ith o th er m aterials. REC O M M EN D ED NUM BER O F V -R IN G S IN A S E T FO R VARIOUS PR E SSU R E S H o m o g e n e o u s R u b b e r a n d /o r C h e m io n (TFE) V-Bing S e ts ; Oto 500 PSI 3 Rings 500 to 1000 PSI 4 Rings 1000 to 3000 PSI 5 Rings If spilt h o m o g e n e o u s V -R in g s a r e u s e d , a n d a d d itio n a l V -R ing should b e ad d ed to th e above. W ith C h em io n (TFE) V -R ings, It m ay b e d e s ira b le to u s e m etal se p ara to r rings and m ale and fem ale ad ap ters at p ressu res over 1000 PSI, E v erseal F a b ric V -Ring S e ts F a b r i c V -R in g s a r e f u r n is h e d split, u n l e s s o th e r w is e s p e c if ie d . T h e follow ing c h a rt m ay b e u se d fo r sp lit V-Ring S e ts; 0 to 1000 PSI ; 4 Bings loobto . 3000 PSI 5 Rings 3000 to /.'sopo psi.;;:: 5000 PSIr " ..?hd P ; 6 Rings / . 7'Rifigs. W hen en d less fabric V-RIngs are u sed , few er rings are n eed ed ; 1500 to 0 to 1500 PS! 3000 PSI 3 Rings . 4 Rings 3000 to 5000 PSI 5 Rings 5000 to 7500 PSI 6 Rings 7500 PSI , dW UP 7 Rings O ne o r m ore h o m o g en b u s V -Rings m ay b e su b stitu ted for e n d le s s fab ric Y -R ics* in a se t, w h e n u se d , they sh o u ld be p laced tow ard the bottom (m ale) a d a p te r o r inb o ard en d of th e se t, A fa b ric V-Ring sh o u ld alw ay s b a c k - p h o m o g e n e o u s V-Ring In a c o m b in a tio n se t. P iston p a c k in g s in a hydrau lic cy lin d er m ay contain less VR ings th an show n ab o v e, sin c e sealin g a t th is point Is not a s critic al a s a ro d p ack in g a n d is u su a lly sa tisfa c to ry if no piston drift is e n co u n tered u n d er sta tic co n d itio n s, FIN ISHES T h e re c o m m e n d e d s u rfa c e fin is h e s fo r o p tim u m se rv ic e life o f V -Ring p ack in g s e ts , re g a rd le ss of m aterial, is 16 m icro in c h e s RM S (m ax,) fo r d y n am ic s u rfa c e s ag ain st w hich the p a c k in g m o v es an d 32 m ic ro in c h e s RM S (m ax.) for sta tic su r fa c e s w hich th e p ack in g c o n ta c ts. If ro u g h er su rface fin ish es a r e u se d , th e se rv ic e life a n d se a lin g efficiency of th e V -packIng s e ts will b e re d u c e d c o n s id e ra b ly , ' GLAND OR STUFFING BOX LENGTH T o c a lc u la te th e p ro p e r co n fin ed h e ig h t of a V -packing se t (the le n g th o f th e s p a c e in to w h ich the* V -packing s e t will b e in stalled), a d d th e nom inal sta ck h eig h t o f all of the com ponent p a rts of th e se t, in clu d in g both a d a p te rs an d V -Rings, Add th e p lu s to le ra n c e sp e c ifie d for e a c h Individual p a rt in th e se t to th is to ta l. T h e r e s u l t a n t f ig u r w ill r e p r e s e n t t h e le n g th o f th e stuffing box, T h is w hen a d d e d to th e required plus toler a n c e n e c e s s a ry fo r m ach in in g th e m etal p a rts wlil g iv e th e confined sta c k height, PU M PS VS, CYLINDERS A lthough th e o p e ra tin g c o n d itio n s m ay b e sim ilar In a re c ip - ' ; m eeting pum p an d a hydraulic cylinder, th e packing perform a n ce m ay n o t b e eq u al. Pum p p ack in g s a re usually su b je c te d to g re a te r m echanical loads, a s ev id en ced by the w ear pattern 180 a p a rt o n a u se d packing se t. T h is v /ear p attern Is In th e sam e p lan e a s th e rotation of th e cran k sh a ft, a n d th e actio n of th e cran k sh aft Is not entirely elim inated by th e cro ssh ead . G en erally, It Is n e c e ssa ry to a d d ad d itio n al V -R ings to a pum p packing s e t to co m p en sate for th e se m ech an ical loads. DESIGN AND INSTALLATION W hen It Is n e c e s s a ry to install V -R Ings o v e r o r th ro u g h th re a d e d surfaces o r o th e r sh a rp projections, b e su re to provide a d e q u a te c le a ra n c e betw een d ia m e te r of p ack in g ring an d pro jection, A diam etrical clearan ce of ,080" is reco m m en d ed . Stuffing b o x o r cy lin d er b o re a n d th e p isto n ro d sh o u ld h av e a 3 0 x 1 /1 6 " m inim um c h am fer a t Its e n tra n c e to facilitate installation a n d elim inate possibility of d am ag e to sealin g lips of packing. B evel, b u rr o r u n d e rc u t all s h a rp e d g e s a n d c o rn e rs in p ack in g area a t tim e of m anufacture. In re c ip ro c a tin g s e rv ic e , avoid a n y d e s ig n in w h ich th e V-RIng m ust p a ss ov er corners, holes, p o rts o r over a ste p diam eter arrangem ent. Do n ot d esig n an installation so th a t bottom ing o r o th e r m e chanical lo ad s a re transm itted to th e p ack in g s. P ack in g s are d e s ig n e d to se a ) fluid p re s s u re o nly-- n o t to a c t a s b u m p e rs. W hen determ ining rod or piston b earin g are a s, do not include p ack in g s an d a d a p te rs in calcu latio n s, a s th ey a re not d esig n ed to take bearing loads. All p a c k in g r in g s sh o u ld first b e lu b r ic a te d w ith a m a te ria l non-injurious to th e packing. Split rings sh o u ld b e installed s o th a t jo in ts on su c cessiv e rings a re 130 ap art, then 90 (see p a g e 7), Jo in ts sh o u ld nev er b e p la c e d o v e r o r n e a r e a c h o th er. E n d s o f all c u t rin g s sh o u ld b e o p e n e d s i d e w a y s when b e in g p l a c e d a r o u n d r o d , R in g s a r e fu rn ish ed c u t to fit a n d sh o u ld n o t b e trim m ed , sin c e th e slig h t overlap at th e joints is n ecessary for satisfacto ry sealing. On i n s t a lla tio n s w h e r e p r e s s u r e Is e x e r t e d in b o th d ir e c tio n s , such a s double-acting cylinders, o p p o sin g se ts of p ackings should alw ay s b e installed so th at th e se alin g lips face aw ay from e a c h o th er. T he fem ale a d a p te rs sh o u ld b e lo cated a d ja c e n t to a fix ed o r rigid p a rt of th e p isto n o r g la n d s o th a t no p r e s s u re lo a d s wifi b e tra n sm itte d to th e o th e r s e t o f rin g s. W hen installing e n d less rings, a m ean s m ust b e provided to elim inate th e a ir cushion w hich b e c o m e s e n trap p ed betv/een the rings w hen they are in serted into th e stuffing box. T o do this, c o lla p se a sh o rt se c tio n o f th e se a lin g lip by in se rtin g a thin b ra ss o r p lastic rod b etw een th e p ack in g ring an d stuffing box w ail. C a re m u st b e e x e rc ise d to a v o id injury to ring lip o r bo x w alk ADAPTERS Both m ale a n d fem ale a d a p te rs m u st b e u se d w ith V-Ring s e ts to properly su p p o rt an d back-up the packing. F or special applications, m etal, lam inated p h en o lic o r o th er hard m a te ria ls m ay b e u s e d fo r th e m a le a n d fe m a le a d a p te r s . In applications w h ere sid e lo ad s a re p re se n t o r w here m echanical lo a d s of an y kind will b e a p p lie d to th e p a c k in g , h a rd a d a p te rs should- b e u se d . T h e m ale a d a p te r m u st b e m a d e o f a rigid m a te ria l if s p rin g lo a d in g is to b e a p p lie d to th e s e t, (S e e b a c k p ag e for dim ensions on m achining ad ap ters,) F or high p re ssu re s o r w h en su rg e o r sh o c k p re ss u re co nditions e x is t In th e sy ste m , it is re c o m m e n d e d th a t a c lo s e fitting m etal o r phenolic bushing b e u se d behind th e fem ale ad ap ter as a b a c k -u p a n d a n ti-e x tru sio n d e v ic e . T h is will allo w th e fem ale a d a p te r to flex u n d e r th e p r e s s u r e o r s h o c k lo a d , b u t will p re v en t it from ex tru d in g a n d fractu rin g . SPR IN G LOADING V-PA CK IN G S E T S T h e u se of sp rin g s to p re lo a d V -packing s e ts c a n h a v e definite a d v a n t a g e s ; however, e a c h a p p l i c a t i o n m u s t b e c o n s i d e r e d o n its ow n m erits, taking in to a c c o u n t th e sp e c ific o p eratin g c o n ditions involved. S p rin g s are n ot g en erally re c o m m en d ed fo r high sp e e d or qu ick rev erse m otion on recip ro c atin g ap p lic a tio n s. P lu n g er p u m ps fall into th is c a te g o ry . H igh s p e e d m ay c a u s e th e p ack in g to sh ift o r " b o u n c e ," allo w in g fluid to b y -p a ss th e p ack in g . As a rule of thum b, sp rin g lo ad in g for a fab ric o r h o m o g en eo u s V -packing s e t c a n 'b e figured o n the b a sis of 5-p o u n d s p er lin ear inch o r m ean c ircu m feren ce, V-Ring s e ts o f T FE , w h e th e r C-VU, C-VH o r s ta n d a rd AN d e sig n , require a h eav ier sp rin g load, A 10-pound spring load p er lin ear inch o f m e a n c irc u m fe re n c e sh o u ld b e u s e d w ith a m inim um to tal lo ad o f 15 p o u n d s. U sing th e a b o v e a s a g u id e , th e follow ing m u st a ls o b e c o n sid e red : N um ber o f V -R ings an d th e c ro ss-se e tio n o f th e set, sp e ed of operation an d th e prim ary reaso n for th e u se of th e spring loading in this p articu lar unit. E vidence g a th e re d thro u g h field e x p erien ce a n d laboratory te s ts In d ic a te s th a t s p rin g lo a d in g is n o t n e c e s s a r y In m o st ordinary hydraulic an d p n eu m atic cy lin d ers being m anufac tu re d to d a y . If a V -p a c k in g s e t Is p ro p e rly d e s ig n e d to fit a fixed gland d im en sio n a n d in stalled p ro p erty , e x te n d e d serv ice life an d p ro p e r se a lin g will re su lt w ith o u t th e u s e o f sp rin g s. If th e m ain r e q u ire m e n t o f a s p r in g is to a d j u s t fo r d if f e r e n c e s in s ta c k h e ig h ts of s e ts , a w a v e sp rin g c a n b e u s e d an d a c ts essentially a s a n "a d ju sta b le sh im ." Split w ave sp rin g s serve we!) for th is p u rp o se ; h o w ev er, a w av e sp rin g 's co m p e n sa tio n for w ear is m inim al. ` S prings are not a sto c k item b u t m ay b e o rd e re d through your local spring m an u factu rer o r su p p lier. W hen a reco m m en d a tion for spring lo ad ed h y draulic pack in g is req u ired , forw ard th e re q u e st to C ran e P ack in g C om pany, alo n g w ith all th e operating conditions an d o th er inform ation in d icated on o u r H ydraulic P acking D ata S h eet No. P-345. I H O M O G EN EO U S V -RINGS John Crane Homogeneous V-Rings are designed for ap plications such as shock absorbers, cylinders, valves and other hydraulic and pneumatic equipment at low to relatively high pressures. They are designed so that they become pre-loaded when installed. Since the packings are automatic in action and sensitive to pressure changes, no gland pressure Is required. Homogeneous V-Rings are always furnished endless. For general services, an ail-purpose compound that effectively handies the majority of temperature, fluid and pressure applications has been developed. How ever, for services beyond the limitations of this com pound, a wide variety of special compounds is also available. In such cases, complete information on tem perature range, fluid handled, pressure range and rate of motion should be furnished to our engineering depart ment for recommendations. Homogeneous V-Rings are normally recommended for temperatures from ---65 to -f 400 F,, pressures to 3000 psl. For higher pressure applications or where clear ances exceed those recommended for homogeneous V-Rings, fabric V-Rings should be used exclusively or in combination with homogeneous rings, (See pages 6 and 7.) Standard sizes of John Crane Homogeneous V-Rings are shown on page 5, STANDARD SIZES IN T E R F E R E N C E HEEL CLEARANCE -- -- w ~ ---- {GLAND WIDTH) B STACK H E IG H T _L Dash No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 ^ 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 33 39 40 . w Ref, % % % % % % % % % % % % % 4 4 4 4 4 % 4 4 4 4 4 % % % % % % % % % % % % % % % % NOMINAL I.D. O.D. B , rfc.OlO Vs Vz ,083 % % ,083 4 % .083 % % ,083 % 4 .033 % % .083 % 7/s .033 4 4 .083 Vn % ,033 % Vz .083 % % ,083 V4 1 .083 % 1% .083 % 1% .083 % 1% ' .083 4 1% .083 % 1% .083 % 1% ,083 % 1% ,083 1 1% .033 1% 1% ,083 1% 1% .083 1% 1% ,083 1% 1% ,083 1% ls .140 1% 2 .140 j% 2/8 .140 1% 2% .140 l 3/4 2s ' ,140 1% 2% .140 2 2% .140 . 2% 2% ,140 2% 2 /3 ,140 2% 3 ,140 2% 3% .140 2% 3% .156 2% 3%. .156 2/* 3% ,156 2% 3% .156 3 3% .156 Dash Mo, 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 ' 75 76 77 78 79 80 W Ref, % % % % % % % % % % % % % % % % % Vz Vz Vi Vz Vz Vz Vz Vz ' Vz Vz Vz Vz Vz Vz Vz Vz Vz Vz Vz Vz Vz Vz Vz NOMINAL l,D. O.D. B dr.OlO 3% 3V4 3% 3i/2 3% 3% 3% 3% 4 4H 4i/ 2 43/4 5 51/4 5Vz 51/2 53/4 6 6% 6Vz 63/4 7 7V4 71/2 73/4 S 3/2 9 9% 10 10% 11 11% 12 12/z 13 13% 14 14/2 15 3% 4 4/3 4% 4% ' 4% 4 /0 43/4 4% 5% 5% 5% 5% 6% 6% 6% 6% 7 7/4 7/2 7% 8 2% 8% 8% 9 " 9% 10 10/2 11 11% 12 12% 13 13% 14 14% 15 15% 16 .156 .156 .156 .156 ,156 ,156 .156 .197, .197 .197 .197 .197 .197 ,197 .197 .197 .197 .197 .197 .197 .197 ,197 .197 ,197 .197 ,197 .197 .197 .197 .197 . .197 ,197 .197 .197 .197 .197 .197 .197 ,197 .197 N O T E : Sizes in heavy type conform to J .I .C , Code H V Series for bydraulie packings, All sizes correspond d im ensionally to A N -6 2 2 5 Series, FABRIC V-RINGS John Crane Fabric V-Rings are recommended for liquid and gas service on ail heavy-duty equipment where operating pressures and clearances exceed those rec ommended for the homogeneous packings. They are widely used in all types of reciprocating pump arid hy draulic cylinder applications and are available in a number of compositions covering an exceptionally wide range of operating conditions. Fabric V-Rings are usually constructed of cotton duck or asbestos cloth, coated with various elastomers and molded under heat and pressure. ORDERING Packings are furnished in sets or as individual rings, If sets are specified, male and female adapters of the same stock are normally supplied, Unless otherwise spe cified by the customer, all packings are furnished split to facilitate installation. Inquiries or orders should state the exact stuffing box depth and total entrance (if any) of gland ring or nut into the stuffing box, ADJUSTMENT On endless ring installations no gland pressure should be used, since the sole function of the gland is to back up the packings when fluid pressure is applied. On split packing installations no gland pressure is re quired to effect a seal in the packings themselves. How ever, light gland pressure is usually required to seal the joints. If light pressure will not produce the desired seal- ing, the trouble lies elsewhere. The packings should be removed and Inspected and replaced, if necessary. To avoid excessive gland pressure, the gland should be bolted down metai-to-metal on shims. Crane Packing Company can provide complete engi neering service and recommendations upon request. DESIGN FEATURES 1, P re ssu re a c c e s s allow s im m ediate p re ssu re distribution and packing response, 2, "B all-Joint" nesting su rfa c e s facilitates breathing w ithout p in ch in g , w ed g in g or-lip co lla p se . ' 3, Adequate lubrication reservoir, 4, U niform bottom th ic k n e ss elim in ates v/eak p o ints and in su res centerline hinge action, 5, M olded-in lip in terferen ce in su res tight sta tic se al an d co n fo rm atio n to b o re a n d ro d d eflectio n s. 6 , Heel c l e a r a n c e p r e v e n t s " r i d i n g " a t h e e l a n d e lim i n a t e s ; tip toe-in. 7 , T h e fab ric in th e V -Rings is so laid to a s su re m axim um stren g th -- an im p o rtan t co n sid eratio n for m axim um i: . p a c k i n g life . . . 6 DIMENSIONAL DATA Nominal Packing Space E'V % fo % fo . l/2 fo % % % /io % Jfe 1 Height of Adapters u + u -.000 .312 .375 .438 ,500 ,563 ,625 .687 ,750 ,813 ,875 ,938 1.000 1,062 1.125 - 1 . ' U A h - H-c-> Stack Height Overall Height V-Ring ,+.020 A-.000 V-Ring + .020 " -.000 .093 .142 .125 ,194 .156 .245 .187 .280, .218 .332 .250 ,387 .281 .431 ,312 ,485 ,343 -533 .375 .571 ,406 ,615 .437 .669 .468 .710 .500 -765 Stack Height F, Adapter r +,020 -.000 .187 .250 ,313 .375 .438 .500 .562 .625 .688 ,750 ,813 .875 .937 1.000 INSTALLATION DETAILS FOR FABRIC REINFORCED V-RINGS in s t a ll m a le or BOTTOM ADAPTER RING FIRST. l e a d -in CHAMPHER , r ' STATIC s u r f a c e FINISH-- 32 FtMs ' ' DYNAMIC SURFACE FINISH-- 16 RMS STAGGER A LL JOINTS ALTERNATELY ISO*, THEN ?0*, RINGS SHOULD OVER. LAP SLIGHTLY AT JOINTS DON'T CUT RINGS, lR I!NGlAhLAlzSJT3,:MAt-B OR TOP a d a p t e r SHIM SNUG AGAINST PACKING, U S E f H I M S ^ T iS lS 1S , T CRUSH)NG THE HINGS' NOMINAL STACK HEIGHT {See P a g e 6 For Tolerances) Nominal Packing Space Vis 22 j/ a %2 Ht % % % Ko % V2 W22 Ko % % 'He % % % % 1 Stack Height V-Ring ,093 ,109 .125 ,140 .156 .171 ,187 ,203 ,213 .234 .250 .265 .281 ,312 .323 .343 ,375 .406 ,437 .468 .500 Height Of Adapters ,312 .344 ,375 .406 .437 ,469 .500 .531 ,562 .594 .625 .656 .687 .750 .781 ,812 .875 ,937 1.000 1.062 1.125 , Total Stack Height {Includes Adapters And V-Rings As Indicated) , 1 2 3 4 5 6 .7 8 '9 10'-; Ring Rings Rings ' Rings Rings Rings Rings Rings Ring* Rings ' -41 .50 .59 ,68 ,78 .87 ,96 1.06 1.15 1.24 ,45 .56 .67 ,78 .89 1.00 1.11 1,22 1,33 1,44 .50 .63 .75 ,88 1,00 1.13 1.25 1.38 1.50 1.63 .55 .67 .83 .97 1,11 1.25 1.39 1.53 1.67 1.81 ,59 .75 .91 1.07 1,22 1.38 1.53 1.69 1.84 2.00 .64 .81 .98 1.15 1,32 1.50 1,67 1,84 2.00 2.18 .69 .87 1.06 1.25 1,44 1,62 1.81 2.00 2.18 2,37 .73 .94 1,14 1.34 1,55 1,75 1.95 2.16 2.36 2,56 .78 1,00 1,22 1.43 1,65 1.87 2.09 2.31 2.52 2.74 , .83 1,06 1.30 1.53 1,76 2.00 2.23 2.47 2.70 2.93 ,88 1.13 1,38 1.63 1,88 2.13 2.38 2,63 2.88 3.13 .92 1.19 1,45 1.72 1.98 2.25 2.51 2.78 3.04 3.31 .97 1.25 1.53 1,81 . 2.09 2.37 2.65 2.94 3,22 3.50 1.06 1.37 1,69 2,00 2.31 2.62 2.93 3.25 3,59 3.87 1.11 1.44 1.77 2,09 2.42 2.75 3,08 3,41 3.73 4.06 1.56 1,50 1.84 2.18 2.53 2.87 3,21 3.56 3.90 4,24 1,25 1.63 2.00 2.38 2,75 3.13 3.50 3.88 4.25 4.63 1,34 1.75 2.16 2.56 2.97 3.37 3.78 4,19 4,59 5.00 1,44 1.87 2.31 2.75 3.19 3.62 4.06 4,50 4.93 5.37 1.53 2.00 2.47 2.93 3.40 3,87 4.34 4.81 5.27 5,74 1.63 2.13 2.63 3.13 3.63 4,13 4.63 5.13 5.63 6.13 7 TFE MOLDED PACKINGS STYLES C-VU and C-VH John Crane Chemlon C-V Packing Rings have proved to be the closest possible approach to a universal pack ing. They are as well suited for valves as for reciprocat ing pumps and other low speed rotary revolving shaft applications under the most corrosive acid, alkali or solvent service conditions. Made of TFE, they also offer the advantages of a wide operating temperature range from ---120p F, to +500 F., plus an extremely low coefficient of friction. "Break out" friction is only slightly higher than "running" friction. This friction-free characteristic prevents shaft or rod wear, promotes smoother action and increases packing life many times over, ' A special cross-section design in each pressure ring permits positive sealing at finger tight gland pressure. Also, this design provides a void between each ring to compensate for the relatively high coefficient of expan sion of TFE. Chemlon C-V Packing Rings are used in sets, the num ber of rings dependent on the stuffing box length and pressures encountered. In all cases, a minimum of two pressure rings, together with male and female adapters, is recommended. STYLE C-VU RINGS For Low P re ssu re Service A very-sensitive and resilient type packing th at Is p articu larly su ite d fo r u se In control o r reg u la to r v a lv e s h an d lin g g a s e s o r fluids. STYLE C-VH RINGS F o r H igh P re ssu re S erv ice T h is d e sig n In c o rp o ra te s a heavy w all an d h e e l sectio n n e c e ssa ry to w ithstand p re ssu re s up to 500, PSI an d over. On p re ssu re s over 1000 PSI, m etal a d a p te rs a re recom m en d ed , (S e a b a c k Cover.) ... - . C-VH R in g s a re re c o m m e n d e d fo r h ig h p re s s u re a p p lic a tio n s su ch a s hydraulic cylinders an d pum ps. ~fr CZfATga THAN STUfffNG BOX 055' SECTION Tl STACK 1 V M A 23 HEIGHT VV1 Vvl /gj / xVaA i1 0NOf MIWM J VI X ftADJAt ____ Y.____ W !a:H BS C-VU RING CONSTRUCTION , OF NOMMAI X RADIAL thickness C-VH RING CONSTRUCTION STACK HEIGHTS and ADAPTER DIMENSIONS (Styles C-VU and C-VH Rlnjjs and ffetsi Nommai Packing Spacer; - . S' Stack Height V-Ring *4)10" Height Of Adapters * 4 )1 0 " Total Stack Height (Includes Adapters and V-Rings as Indicated) '1 ': v 'i . : . .4 Ring Rings Rings Rings 5 ... Rings Rings 7 V - Rings Rine* ` 9M Rings 10 Rings. Va -100 ,197 .297 .397 .497 .597 .697 .797 .897 .997 1.97 1,197 VlZ ,125 ,228 .353 .478 .603 ,728 .853 ,978 1.103 1.228 1.353 1.478 Vie .150 ,260 .410 .560 .710 .860 1.010 1.160 1,310 1.460 1.610 1.760 Vzi ,175 ,291 -466 ,641 .816 .991 1.166 1.341 1.516 1.691 1.866 2.04 V i .200 ,322 ,522 ,722 .922 1.122 1.322 1.522 1.722 1,922 2.122 2.322 Vi% -225 ,353 .578 ,803 1,028 1,253 1.478 1.703 1.928 2.153 2.378 2,603 Vii ,250 ,335 .635 .385 1.135 1.335 1.635 1.885 2.135 2.385 2.635 2.885 U/iZ .275 ,416 .691 .966 1.241 1.516 1.791 2.066 2.341 2.616 2.891 3.166 Va .300 ,447 -747 1,047 1.347 1.647 1.947 2.247 2.547 2,847 3,147 3.447 Wzz .325 ,478 .803 1.128 1.453 1,778 2.103 2,428 2,753 3.078 3,403 3.728 Vu .350 ,510 .860 1.210 1.560 1.910 2.260 2.610 2.960 3,310 3.660 4.010 % .375 .541 .916 1.291 1.666 2.041 2.416 2,791 3,166 3.541 3.916 4.291 Vz .400 .572 ,972 1.372 1,772 2.172 2.572 2.972 3.372 3.772 4.172 4.572 l %2 ,425 ,603 1.028 1.453 1.873 2,303 2,728 3.153 3.578 4,003 4,428 4,353 Vu .450 .635 1,085 1,535 1.985 2.435 2.885 3,335 3.785 4.235 4.685 5;135 % .500 ,697 1.197 1,697 2.197 2.697 3.197 3.697 4.197 4.697 5.197 5,697 2^2 ,525 ,728 1.253 1-778 2.303 2.828 3,353 3.878 4.403 4.723 5,453 5.978 % ,550 .760 1.310 1,860 2,410 2.960 3.510 4.060 4,610 5.160 5.710 6,260 % ,600 -822 1.422 2,022 2.622 3.222 3.822 4,422 5.022 5.622 6.222 6.822 % ,650 .835 1,535 2.185 2.335 3,485 4.135 4.785 5.435 6,085 6.735 7.385 Va ,700 ,947 1.647 2.347 3,047 3,747 4.447 5.147 5.847 6,547 7.247 7.947 % ,750 1,010 1.760 2,510 3.260 4,010 4.760 5.510 6.260 7.010 7.760 8,510 1 ,300 1.072 1,372 2,672 3.472 4.272 5.072 5,872 6.672 7,472 8.272 9.072 NOTE: 1, Stack height of sets should be measured with a minimum of 10 pound load applied to set In uriconflned state. 2. Minimum of three pressure rings per set recommended if space permits, ` STANDARD SIZES (C-VU and C-VH Rings and Male and Female Ada pte rs.) Hom inti . Box S ite . 10 op Six Stck Mold No, Style " W r-U " Hom intl Bot Star JD OD Six* Steck Mold No, H t , . Sfide . : "H " V U " H om inti . 001 S ta r / 1D ' OD Size Stack Mold No*. Ht, Style " H " V jjV l/ B x 5/16 V I X 3/3 1/3 x 7/16 1/8 x 1/3 1/8 X 5/8 1/8 X 11/16 3/16 X 3/ 8 3/16 x 7/16 3/16 X 1/Z 3/16 X 9/16 Z5 ,075 35 ,100 27 .135 38 ,150 ZIO -ZOO ZI .225 36 .075 37 .100 33 ,125 39 .150 y y -- yX XX x y yX yX y% y-- 1/Z X l 816 .200 1 /2 *1-1/8 818 .250 1 /2 x l-1 /4 820 ,300 9 /1 6 x 13/16 013 400 9 /16 * 7 /3 914 ,125 9 /1 6 * 15/18 615 .150 9 /1 6 *1 91 .175 9 /1 6 *1-1/16 917 5 /8 * 13/16 1013 .074 5 /8 * 7 /8 1014 ,100 X X X X X X X X X X X X X X X y. X %X 1 *1-3/4 1628 .300 1 *1-7/3 1630 ,350 1-1/16 *1-9/16 1725 ,200 1-1/16 *1-11/16 1727 .250 1-1/16 *1-13/16 1729 ,300 M / 3 x l'3 /8 3322 .100 1-1/8 *1-1/2 1824 ,150 1-1/3 *1-5/8 1826 ,200 1-1/8 *1-11/16 1827 .225 1-1/8 *1-3/4 1828 .260 X X X X X X X X X X ,, X X X X X X 3/16 X 5/3 310 ,175 3/16 x 11/16 311 .200 V i X 7/15 1/4 X 1/Z 47 .075 48 .100 1/4 x 9 /16 49 ,125 1/4 x 5 /8 410 .150 1/4 x 11/16 411 .175 1/4 x 3/4 412 .200 1/4 X 7 /8 414 ,250 6/15 x 1/Z 58 ,075 5/16 x 9 /1 6 59 ,100 5 /1 6 X 5 /8 510 ,125 5/16 x 11/16 511 .150 5 /l x 3 /4 51Z ,175 5/16 X 13/16 513 ,200 5/16 *1-1/8 18 ,325 3 /8 x 9 /1 6 69 .0 /5 3 /8 X 5/8 610 .100 3 /8 X 11/16 11 .125 3/8 x 3/4 612 .160 3/8 X 13/16 613 .175 3/8 X 7 /8 614 ,200 3/8 x! 615 .250 3/8 xl-1/3 7/16 X 5/3 613 ,300 n o .075 7 /1 6 X 11/16 711 ,100 7/16 X 3 / 4 7)2 ,125 7/16 x 13/16 713 .150 7 /1 6 x 15/16 715 .200 7/16 xl 716 .225 7/16 X1-1/8 713 .275 1/Z X 3 /4 813 ,100 1/3 x 13/16 m ,125 1/3 X 7 /8 314 .150 .1/3 x >5/16 815 .174 X x xX XX XX yX y O-- yX yX xX XX xX XX XX XX yX %X yX %X yX x-- XX XX X XX XX XX XX XX X-- yX yX %X yX yX 5 /8 * 15/16 1015 4 2 4 6 /3 1016 45 0 6 /8 *1-1/8 1012 .ZOO 6 /8 *1-3/1 1019 / m 5 /8 *1-1/4 1029 ,250 5 /3 *1-3/8 5 /3 *1-1/2 11/16 *1-1/15 11/16 *1-1/8 11/16 *1-3/16 1022 .300 1024 .350 1117 4 5 0 m a 475 1119 .200 11/16 *1-1/4 1120 ,225 3 /4 *1-1/16 1217 4 2 5 2 / 4 *1-1/3 1218 4 5 0 3 /4 *1-3/16 1219 4 75 3 /4 *1-1/4 1220 .290 3 /4 *1-5/16 1221 ,225 3 /4 *1-3/8 1222 ,7.50 3 /4 *1-1/2 1224 .300 3 /4 *1-5/8 1226 .350 13/16 *1-5/16 1321 ,200 13/16 *1-3/8 7 /3 *1-1/4 7 /3 *1-3/8 7/8 *1-1/2 7/8 *1-5/3 1322 ,225 1420 ,if>n 1422 ,7.00 1424 .250 1426 ,300 15 /1 *1-7/16 1523 .200 15/16 *1-1/2 1524 ,225 15/16 *1-9/16 1625 .250 1 *1-3/16 1619 .975 1 * 1 4 /4 1620 4 0 0 1 *1-3/8 1622 4 5 0 1 *1-7/16 1673 .175 J *1-1/2 i m .300 1 i- *1-9/16 1625 .275 1 *1-5/8 1626 .250 yX %X y X % y-- % .... y yX %X xX x . X X X X X X X X X XX X X X X X X X X XX XX X yX y J, X y X __ x-- X_ X X X X X X M /S 1-1/8 M /3 1-1/8 1-1/8 x l'7 /3 *2 *24/3 *2-1/4 *2-3/8 3330 .300 1832 .350 3334 .400 1835 ,450 3338 ,500 1-3/16 *1-1/2 1974 .125 1-3/16 *1-13/16 1929 .250 1-3/16 *1-7/8 1930 ,275 .1-3/16 * 1 4 5 /1 6 1931 ,300 1-3/16 *2 3932 .326 1-1/4 1-1/4 1-1/4 1-1/4 1-1/4 *1-1/2 *1-3/4 *1-7/3 *2 *2-1/8 2024 ,100 2028 .200 2030 .250 2032 ,300 2034 .350 1-1/4 *2-1/4 1.5/16 x l M / 3 *3*3/4 1-3/8 *1-7/3 1-3/8 *2 2036 ,400 2132 ,2/6 17.7.2 ,350 i m ,200 2232 ,250 1-3/8 *2-1/8 2234 ,300 1-3/8 *2-3/16 27.35 .325 1-3/3 *2-1/4 1-3/3 *2-1/2 2236 .350 2240 ,450 1-7/15 *1-15/16 2331 .200 1-7/36 *2-3/16 2333 ,250 1-7/16 *2-3/16 2335 ,30U 1-1 /2 *2 2432 .200 J-1/Z *2-1/8 2434 .26!) J -1/2 *2-1/4 2436 ,300 1-1/2 *2-1/2 2440 .400 1-5/8 *2-1/4 1-5/8 xZ-3/8 2636 .250 2038 .300 1-5/8 *2-9/16 2641 .375 1-5/8 *2.5/8 2642 .400 X X X X X X-- X-- X . --X X X X y-- x xX xX xX --X X X -- X X X X X X X X --X-- X-- X X X X-- X X X X X X X_ XX XX X-- X-- MOTES: (1) in addition to the above standard stock sizes, molds to make many other sizes are available. (2) All rings are endless and can be diagonally cut with pen knjfe for Instal lation purposes v/hen It is net desirable or practical to disassem ble the valyo unit, Hemlnal Bo* Site Size SUek ' Meld . H t Styl 10 " H " ,'W > 1-11/16*2-7/16 2739 ,300 1-11/16*2.1/2 7740 .325 1-3/4 *2-1/4 2836 .200 1-3/4 *2-3/3 2833 ,250 1-3/4 *2-1/2 2840 .300 x x X . .. xx X X 1-3/4 1-7/8 1-7/3 Jl-7/8 2 *2-3/4 *2-3/2 *2-5/8 *2-7/8 *2-1/2 2844 ,400 3040 .250 3042 ,300 3046 ,400 3240 .200 x X __ x X X X 2 *2-5/8 3747 .250 X x 2 *2-11/16 3243 ,275 x 2 *2-3/4 3244 .300 X x 2 *2-7/8 3246 .350 X Z x3 3248 ,400 X -- 2-1/6 *2-13/16 3345 ,300 2-1/8 *2-7/8 3445 ,300 2-1/3 *3 3448 ,350 2*3/15 *2-13/16 3545 ,750 2-3/15 *3 3548 ,325 x x-- X X X 2-1/4 X2-7/S 3645 .250 2-1/4 *3 3648 .300 2-1/4 *3-1/4 2-3/3 X3-1/8 3552 .400 3850 ,300 2-7/16 *3-7/16 3955 .400 Xx X X X X X X X 2-1/2 *3 4048 ,70(1 2-1/2 *3-1/8 4050 .250 2-1/2 x 3 'l/4 405? .300 2-1/2 *3-1/2 4056 .400 2-9/16 *3-3/16 4151 .300 X-- xx Xx X X-- 2-9/16 *3-9/16 4157 ,400 2-5/8 X3-3/8 4254 ,300 2-3 /4 *3-1/4 4452 ,200 2-3/4 *3-1/2 3 *3-3/4 4456 ,300 4360 ,300 3 3-1/3 3-1/8 3-1/4 *4 *4 *4-3/8 *4 4864 ,400 5064 ,350 5070 ,500 5264 .300 X X e_~ X X X X y-- y y X-- i TEMPERIZED ST Y LE T7S-T V-RINGS Temperized Style 775-T V-Rings are a new advance in TFE V-Ring packings both in design and in economy. Manufactured by a new John Crane process, these rings are formed in special molds under heat and pressure to offer advantages not found in similar type TFE packings. (See illustrations at right.) John Crane Temperized Style 775-T V-Rings are manufactured to the same high density and close tolerance standards of fine machine rings. They offer a universal packing for hydraulic cylinders, valves, reciprocating or rotary pumps and other revolving shaft applications. They are non-toxic and 1, An induced elastomeric astion at normal operating temperature causes the 1.0, and 0,D , lips to expand to insure maximum sealing on belli the rod end tbe cyl. inder wall. impervious to practically all chemicals, corrosives and solvents over a wide temperature range from --120 to 2 , Coneistently sharp Ups previde a positive seel un der both static or dynamic conditions. +500 F, Another outstanding characteristic is their low coefficient of friction -- "breakout" friction is only slightly higher than "running" friction. Consequently, rod wear is reduced to a minimum, smoother operation is DIMENSIONAL DATA Nominal . .. C/S,,,: A Stack Height promoted and packing life is increased many times over. 3 , C o m p le te uniformity through precision dies that % ,1 3 0 .083 Temperized Style 775-T V-Rings are result in better overall seal ing performance. & ,192 ,083 manufactured in production quantities i 3A .2 5 5 .0 8 3 only. They are designed to AN 9is ,3 1 7 .1 4 0 specifications and are available in % .3 8 0 .1 5 6 a range of sizes as shown in the ,4 4 2 y2 ,5 0 5 .1 9 7 .197 Dimensional Data Table. ~-r,C.0CIO5 Note: Dimensions arc in inches STANDARD SIZES (AN Design) Vz X 1 X .0 8 3 7.6 X 1 He X ,0 8 3 % X 1% X .083 %X X .083 % X 15 X .0 8 3 W z X 2 X .083 i y 2 X 2 i/2 X ,1 4 0 i % X 21/4 X ,0 8 3 X 2% X .140 i% X 2 i/2 X ,1 4 0 21/2 X 3 X .0 8 3 2% X 3 X .140 2 i/a X 3 i/s X .1 4 0 2 1 /z X 31/4 X .1 5 6 2 % X 31/4 X .1 4 0 33/4 3% 4 4V a 4 1 /2 X 41/2 X 43/4 X 4% X 51/s X5 X .156 X .197 X .197 X .197 X .083 4 ., More compact installa tion in that less stack height is required than with other type V-Sings. 1 X i y 2 X .033 lMn X i X .0 8 3 I V a X l 3/4 X .0 8 3 IV a X 1% X ,140 1% X 2 X .140 2 X 21/2 X .0 8 3 2 X 2 % X ,140 2 % X 2% X ,140 2 y 4 X 2% X .140 21/4 X 3 X .1 4 0 2% 3 3 Va 3% 3 1 /2 X 31/2 X 33/4 X 3% X4 X 41/4 X .1 5 6 X .1 5 6 X .1 5 6 X .140 X .156 41/2 43/4 51/4 53/4 6% X 5 3 /s X 53/s X 5% X 6 3 /s Xm X ,197 X .197 X .140 X .1 4 0 X .140 5 , Practically uniimited . storage life without loss ol dimensional stability or other properties. 10 STYLE C -78V A SBESTO S TFE V-RINGS C-VH a n d AN D esign Style C-73V V-Rings are recommended for reciprocating motion .applications requiring the chemical and temperature resistance of TFE. Typical applications are reciprocating plunger and piston pumps in difficult to handle fluid services, as v/ell as hydraulic cylin ders in special applications that cannot be handled with other materials, Style C-78V V-Rings are a die-formed V-Ring, either the standard C-VH or AN design, made of asbestos impregnated with TFE suspensoid and fabricated to form a fibrous reinforced self lubricated V-Ring, DIMENSIONAL DATA (C-VH Design) Nominal Size IP Vis Va He Va Be J/ z % % % % % % 1 1 Wa Wa iy6 1 Va Wa 1 Be 1 Be Wa 1% 1% IBs Wz Wz Wz 1% 1% Stack, mtmmrn fHeight? He ,1 5 0 % .150 % .150 % ,150 % ,150 Va i Wz Wa 1% Wz Wa Wz Wa Wa .1 5 0 .1 5 0 ,1 5 0 ,2 0 0 ,2 0 0 ,2 5 0 .3 0 0 .2 0 0 ,3 0 0 .2 5 0 W a .300 1 3 /, .2 1 5 W a ,200 2 .3 0 0 1% ,150 2 K* .3 0 0 W a ,150 W z .200 2 Va ,3 0 0 .3 0 0 2Va .300 2% .350 2 Vi .400 2 Va .200 2Va .2 5 0 l'D' Wa 1% Wa Wa Wa 2 2 21/4 2Y4 2Va 2 Va 2 Va 2Vz 2Vz 2Vz Wa 3 Va 3Vz 3Vz 3% 3% .43/4 rstckl a ...vawS Heimi 2% 2 1 /4 2 3 /4 2 Va 2Va .300 .200 ,400 .3 0 0 .150 2 Va .3 0 0 3 .4 0 0 2% 2 Va : 3 .2 0 0 ,2 5 0 .3 0 0 3 3 Va 3 Va 3 Va 3 Va .2 5 0 .300 .2 5 0 .3 0 0 .3 5 0 4 Va 41/4 4 Va . Wz 4 JMc .3 5 0 ,3 5 0 .3 0 0 .4 0 0 .3 5 0 5Be .5 0 0 51/4 .600 DIMENSIONAL DATA (AN Design) Nominal Size CROSS SECTION MsassH H K Va % Va Va Vz 1 96 M e Va W a Va W a % lHe % Wa % Wa % VAo Va Va 1 1 Wa 1 V0 Wa m 1 Be Wz Wa Wa Wa IVa 1% Wz Wa 1% Wz 1% 1% Wa 2 Mr, 2%e 3 Va 2 Va 2 Va 3 21/4 2% ; Stack". Height ' .083 .083 .083 ,156 .033 .140 ,083 .083 ,083 .140 .140 .156 .083 .083 ,083 ,083 ,083 .156 ,197 .197 .140 .197 .197 .083 .156 . I.D-/.tr r f o m 2 Va 2 % 2Va 3 2% 27/s 2 % 3 Va 2Be 2 % 27ic 3 Va 2/jc 2 Va 2 V2 3 21/2 3 1 /4 2 3/4 3 Va 23/4 3 Va 3 4 3 3/4 43/4 4 4% 4 1 /2 5 1 /2 5 53/4 5 1 /4 6 Va Stakl Height# .083 ,156 .083 .156 .197 .156 .197 .083 .156 .083 ,197 .197 ,197 .197 .197 .156 .197 M A C H IN IN G DATA FOR METAL ADAPTERS Homogeneous, Fabric, C-VU, C-VH, Temperized 775-T and C-78V V-Rings (R e co m m e n d e d M a te ria l-- B ro n ze o r B rass) 0,D.MIN,-:008" HOMOGENEOUS AND FABRIC V-RINGS - I.D.MAX.+.008" R RAD. FEMALE ADAPTER O.D.MIN-,020/i)30'' Pressures P.S.I. Clearances Female Adapter 1500-2000 .005 2000-3000 .004 3000-5000 ,003 NOTEl Clearances for female adapters need tilth hom ogeneous VR in gt at pressures over 1500 pel, should be decreased per small table above. cmM m a iti % ,177 W .240 % ,302 % .365 % .427 `/a .490 % .615 Ji P. 1 $ |P H H $ -- .125 .166 .048 ,06 ,125 ,1 8 8 .080 ,06 ,125 .219 ,098 .09 ,125 ,2 5 0 ,120 .12 ,125 .281 ,144 .14 ,125 .307 .170 .16 ,125 .373 ,219 ,19 % .740 .125 .4 3 8 .269 .22' % ,865 .125 ,500 ,318 .25 MALE ADAPTER 1 .990 .125 .563 .364 .23 CHEMLON CV-U, CV-H, TEMPERIZED 775-T AND C-78V V-RINGS C-VU FEMALE AND C-VH, 775T and C-78V > NmnijiaJ faciline Space r . y ' / s , B MALE ADAPTER deference ' T \ : . , MAX. % .188 .123 .136 ,020 % .250 .145 ,163 .020 % ,312 - .176 .190 : ,020 % ,3 7 5 .202 .212 .025 % .437 ,229 .239 .025 Va ,500 .255 .267 .025 % .625 .307 .321 ,030 % .750 .360 .371 .030 N O T E S : ( X ) Fem ale adapter stem d ia . is + .0 0 5 , box bore is --.0 0 5 . M ale adapter stem dia. Is + .0 1 5 , box dia. is --.0 X 5 . (2) Female adapter tolerances are + .0 0 2 I.D ., + .0 0 3 O .D , +.000 - .0 0 3 M ale adapter tolerances are + .0 0 5 I.D ,, -.0 0 2 O .D , ' -.0 0 0 -,0 0 5 CRANE PACKING COMPANY 6 4 0 0 O A K T O N S T R E E T , M O R T O N G R O V E , IL L IN O IS 6 0 0 5 3 (ChicagoSuburb) In C anada: Crane Packing Company, Ltd., Box 3248, Station C, Hamilton, Ont. In Mexico: Industrias John Crane de Mexico, S.A. Ponlente 152 fS79 Industrial Vallejo, Mexico, D.F. In Brazil: John Crane Industrla E Comerclo, Ltda. Avenida Jurubatuba 800, Sao Bernardo do Campa, S.P. In A ustralia: John Crane Mauri Ply., Ltd., 168 Eldridge Road, Bankstown, New South Wales, Australia In Europe: Crane Packing Ltd., Slough, Bucks, England In Japan: John Crane Jap an , Inc., No. 8, Tenjlnbashi-auji 6-chomo, Oyodo-ku, O saka 831, Japan O FFIC ES, W A R EH O U SES AMO SERV ICE T H E W O R L D OVER -CUP ACKINGS Homogeneous U-Cup Packings STANDARD "AN" DESIGN John Crane Homogeneous U-Cup Packings are available in a full fine of sizes for hy draulic and pneumatic applications- They are especially adapted to rod and piston assem blies with reciprocating motion or where there is a definite space limitation. Sealing is accomplished by means of the contact made by the U-cup's flexible lips, which are de signed to be preloaded when installed. The solid section design at the heel is narrower than the packing groove to eliminate binding In service. Homogeneous U-cups are available in a variety of compounds to meet specific con ditions, They have low frictional qualities and are completely automatic in action. S m aller cross sectio n saves space. In c re a se d lip b o d y o ffers g re a te r re sistan ce to high p re ssu re s, sen sitiv ity to low p re ssu re s. 2 HUVA DESIGN John Crane HUVA-Cups are a proven ad vancement in homogeneous rubber U-cup packings for both static and dynamic seal ing, They offer definite advantages over standard U-cups of the AN design in a wide variety of hydraulic sealing applications, 1. Space savings--smaller cross section facilitates product design, 2, Ability to withstand higher pressures. 3, Greater stability and pressure resis tance--made possible by 80-durometer hardness. 4. Greater sensitivity to lower pressures ' due to the special angle of the lips. HUVA-cups can be used without additional back-up rings at .pressures up to 1500 PSI, They will perform at higher pressures if the clearance behind the cup is bridged with a suitable back-up material. HUVA-cups are furnished in a Buna-N compound for most hydraulic and pneumatic cylinder applications. Other compounds are available for services such as fire-resistant fluids and high temperatures. Fabric U-Cup Packings John Crane Fabric U-Cups are a heavy-duty seal designed primarily for slow moving rams and pis tons such as found in hydraulic presses, jacks and cylinders. Space saving and ease of installation features make these unitary seals attractive to de signers, They are designed with heel clearance for . minimum friction and positive lip interference, which provides the initial seal at low pressures. Fabric U-cups are generally recommended for hydraulic pressures up to 3000 PSI; however, they can be used successfully at higher pressures when clearances between the metal parts are held to a minimum. Frgr'iT.r] 'Ti <?& 1 ir, j ivi 1% 1 Vi 2 2 2 Va 2% 2 '/j 2 Vi 2Va 3 3 Va 2Vt 3 Va 4 4 4 Va 4 /i 4 Va S 5 5 Va S Vi b 6 b Va bVi 6Va 2 2Vi 2% Vh 3 3 3 3 Va 3Vi Vh 3 Va 4 4 Va 4>/i 4Va - S S 'h S 'h SV> % 6 6 b y, 7 7V 7 7 Vi S Va V Vu, Va Vt Vi Vi Vi Vi Vi Vi Vi % Vi Vu Vi Vu Vi Vu Vu Va Vi Vi Vi t Vi Vi Va 7 7 Va 7Vi e 8 8 8 Vi 9 9 Vi IO IO iO 'h 12 12 14 14 15 16 18 20 21 22 24 26 30 32 26 8 Vt 8 Va Va 8 Vi Vi 9 Vi 9 'A 1 IO VA 9 Vi Vi 10 Vi i 1 0 /i Vt 11 Vi 1 12 1 Va 12 1 1314 1 13% 1 1 5 'h 1 16 1% 17 1 1 7 Vi 1 19 Vi 1 21 Vt 1 22Vi ! 22Vi 1 25Y t 1 2 7 Vi 1 2 1 'h 1 2 2 'h 1 27Vt 1 INSTALLATION T he preferred installation, for a fabric U -cup is w ith th e u se of a p e d e sta l o r p ed estal a n d b ack -u p cu sh io n ring. T he ped esta! k eep s th e lips of th e U -cup aw ay from the bottom of th e gland, a n d it d o e s n o t exert r a d ia l p r e s s u r e o n th e lips. T his allo w s th e m o ld ed -in lip in terferen ce to p rovide th e initial seal a n d th e p re ss u re to a c tu a te th e lips. P ed estals are m ade of one o r m ore lam inations of g ask et m aterial. T he length o r h eig h t of the p ed estal can be v a rie d to fit th e sp e c ific g la n d o r stuffing box. T h e b 2c k - u p c u s h io n r in g a c t s a s a n a n tl-e x tru slo n rin g a n d p ro te c ts the. U -cup a t h ig h er p re ssu re s, it is usually m olded of th e sa m e m a te ria l a s th e U -cu p , a n d s in c e It d o e s n o t fu n ctio n a s a se a l, th e b a c k -u p ring m ay b e u se d in split form . Pedestal Bing and Back-Up Cushion Ring T h e u se o f b ra id e d filler rin g s is a carry -o v er from le a th e r U -cups, L e a t h e r d o e s n o t h a v e an e l a s t o m e r i c m e m o r y , a n d t h e b r a i d e d fla x filler rin g s w e re u se d to m ain tain lip c o n ta c t a t low p re ss u re s . F abric U -cups h a v e a m old ed -in lip in te rfe re n c e a n d th e e la sto m e r b in d e r p ro v id es th e " m e m o n /' to m aintain lip c o n ta c t a t all p ressu res. O P iston S nap-O n Installation-- Fabric U -cups can b e econom ically in stalled o n o n e -p ie c e p isto n s, B elotv is a s k e tc h o f h o w th is c a n b e accom plished, It is im p o rtan t th at a sh a rp co rn er b e m a ch in ed w h ere th e bottom of th e g ro o v e m e e ts th e sh o u ld e r. This is th e s e c re t in th e s u c c e s s of th is ty p e of in stallatio n . F or this reaso n It is re c o m m e n d e d th a t a s lig h t c h a m fe r b e c u t in th is c o rn e r, w h ic h te n d s to fo rc e th e lip tig h tly in to th e c o rn e r a s su rin g th a t it will b e re ta in e d o n th e p isto n . 4 DESIGN and INSTALLATION Standard AN design U-cups and HUVA-cups are essen tially the same kind or type of packing. The differences are in hardness, cross-section and application. Although both can be manufactured in a variety of compounds, U-cups are usually supplied in 70 durometer and HUVAcups in SO durometer hardness. Recommended rod surface finish is 16 RMS. (max.) with internal gland thread offset to avoid damage to the U-eup lips upon installation. Also, all sharp edges and corners in the packing installation areas should be re moved. In reciprocating service, avoid any design In which the U-cup must pass over corners, holes, ports or over a step diameter, U-cups are generally used in pneumatic cylinders for pressures up to 00 PS). HUVA-cups can be used in both air and hydraulic cylinders for pressures up to 1000 PSI, HUVA-cups will handle pressures up to 5000 PSI if back-up rings are used io bridge the clearance behind the packing and prevent extrusion. Generally, the back-up rings are-cut from 1/16" thick gasket sheet materia). Recommended finishes for the use of HUVAcups are 16 RMS on a dynamic surface and 32 RMS on a static surface. Groove Dimensions U-cup and HUVA-cup groove dimensions can be calcu lated with the formulas shown below. If back-up rings are used, the groove length (Dim. A) must be increased by the thickness of the back-up ring. Lip Trim . Sharp clean lips are obtained on both U-cups and HUVAcups by knife trimming, U-cup lips are cut straight (90" to the axis) and HUVA-cup lips at a 20 angle. The angle trim on the HUVA-cup lips provides a better seal at tow pressure and reduces break-away friction. Pedestals and Spring Loading These are not generally recommended for U-cups and/or HUVA-cups, Pedestals are not required to support end prevent twisting if the groove or gland is properly dimen sioned, Spring loading the lips of a U-cup or HUVA-cup defeats the purpose of the design; low friction arid pres sure actuated iips. PISTON . INSTALLATIONS ROD INSTALLATIONS Ptuw Bu m ~ CI,,) A(Mjn)="L-1-1/32i;S N(Min)= R(WW*r2W-rCitMii M (Mm ) R (M W + C (M m ) A(MiniB L-H/32:Sio DIMENSIONS A * Groove Length 8 * Cyttntiar tiara C " Matitnum Dutfrieirsl Cittarance G ~ Piston Grootfe Qiameter l - Length ot HUVA Cup M * pod tiearfng OiemsUt W " Giattd Diameter . . P * Piston Znametet 8 Hod Otaivoter W * fionUnai.CfOSS'Senton of HUVA Cop RECOMMENDED MAXIMUM OIAMCTKAI CUADNCES T fp OF SSflVIC UP TO : W PSJ OVH 1000 PSI Ughi uty m .015 Medium Oufy JWS ,010 Heavy Duty m m N o te : Other sizes available. 3 Cbemlon TFE U-Cup packings are available in a wide range of sizes. For sealing purposes, the U-cup depends upon contact made by its flexible lips. The solid section at the heel of the cup is generally narrower than the packing groove width and does not come into contact with the groove base and the adjacent part until pres sure is applied. Consequently, when installed, the pack ing is slightly pre-loaded, U-cup packings have low frictional qualities and are completely automatic in action. Due to their design, they can be assembled satisfactorily in glands which have variations in cross sectional dimensions, thus permitting more liberal manufacturing tolerances, U-cup packings are also very successful in applications where it is de sirable to reduce excessive packing friction. OPERATING PRESSURE U -cup pack in g s conform ing to th e draw ing below are g en erally rec o m m e n d e d for o p e ra tin g p re s s u re s u p to 1500 PSJ. On in stallatio n s w h ere o p eratin g p re ssu re s ex cee d 300 PSI, diam etral c le a ra n c e s a t th e heel of the c u p sh o u ld b e held to ,004"-,006", DESIGN and INSTALLATION for TFE U-CUPS T h e g lan d ring supporting th e h e e l of the p ack in g c lo s e fit to th e rod, having a m axim um radial c le a ra n c e It is reco m m en d ed th at th e ro d su rfa c e finish b e (m ax.), internal th read s sh o u id b e o ffset so th a t no will b e d o n e to th e U -cup lip s u p o n in stallatio n . m ust be o f .003", 16 RMS dam age STANDARD SIZES and DIMENSIONS :Q 05;- if g n | Va A Vu % Vi 'A Vu> Vu Zl 1 V* Vu Vu % I 1/ Va Vu Vu % VA v* Vu Vu Vi VA ~ v T Vu Vu 1 VA Va Vu Vu I 1/ VA 'XI Vu Vu VA VA A Vu Vu VA VA Vu, Va Vu ~|c|----, T he installations show n in th e draw ing ab o v e a re recom m en d ed , O ne illustrates a typical o u tsid e p a c k e d installation \ V 2 Vu Va Vu va 2V> Vu Va Vu VA 2Va Vu Va Vu VA 2% Vu Va Vu VA 2Vi Vu 7/n Vu a n d th e o th er an inside p ack ed installation. T h e sa m e gen eral 2 2% Vu Va Vu d esig n ru les apply for both o f th e se ty pes; how ever, provision 2Vi 2% Vu Va Vu should be m ade for su p p o rt of th e cup a t the b a se of the 2'A VA Vu Va Vu g ro o v e to perm it th e lips to fiex u n d e r varying p re ss u re lo ad s. VA 3 Vu Va Vu I T h e m etal su p p o rt ring o r a d a p te r u se d fo r th is p u rp o se sh o u ld VA 3 Vi Vu Va Vu n o t ex e rt axlai p ressu re a t th e b a s e of th e groove, sin c e this w o u ld te n d to re tra c t th e lip s o f th e c u p a*//ay from th e s e a le d su rfa c e s . It is su g g e ste d th a t th e m etal su p p o rt ring b e co n s tr u c te d so th a t it will b e p ro p e r)y c e n te re d , 2Vi VA Vi Va Vu 2% 2Vi y Va Vu 3 3 % % Va Vu U -cup packings can also b e a d a p te d for spring loading. 5 DISTRIBUTED BY CRANE PACKING COMPANY 6400 OAKTON STREET, MORTON GROVE, ILLINOIS 60053 (Chicago In Canada: Crane Packing Company, Ltd., Bo* 3248, Station C, Hamilton, Ont. In Mexico: Industrlas John Crane da Me*lco, S.A. Ponlento 152 SE13 Industrial Vallejo, Mexico. D.F. In Brazil: John Crane Industrla E Comcrcio, Ltda. Avenlda Jurubatuba 600, Sao Bernardo do Campo, S.P. In A ustralia: John Crane Mauri Pty., Ltd., 166 Eldrldge Road, Banksfown, New South Wales, Australia In Europe: Crane Packing Ltd., Slough, Bucks, England In Japan: John Crane Japan, Inc., No. 6, Tenjlnbashi-suji 0-chome, Oyodo-ku, O saka 531, Japan Suburb) OFFICES, W AREHOUSES AND SERVICE THE W ORLD OVER Printed in U.SA p S fi W S ilaim i # 8 ^mrnrn SU rJjiiijgitHtiffl m k r y i ISTON CUP ACKINGS JIL &JfM m. | il -Sr. lu r,J` }i(S fjM g liS Il Pisten Cup Packings Homogeneous and Fabric John Crane Piston Cup Packings re designed specifically for pis tons in reciprocating pumps and pneumatic and hydraulic cylinders, They offer the best service life for this type application, require a minimum recess space, minimum recess machining and are simply and quickly installed, Homogeneous piston cups are available in a variety of com- 5 pounds for specific applications. Fabric piston cups have cotton, asbestos or other suitable fabric frictioned with synthetic elastomers to meet various service conditions. Homogeneous piston cups are generally recommended for low pressure service applications since their greater flexibility at the sealing lip makes them more responsive to light pressures, Fabric cups with their more rigid construction are recommended for higher . pressure services up to 3000 PSI, DESIGN and INSTALLATION Jo h n C rane P iston C up P ackings in co rp o rate an exclusive sq u a re cu t heel d esig n th at elim in ates binding in se rv ic e a n d a t the sa m e tim e stren g th en s th e h in g e a re a a t the heel. S p ecial lip d e sig n provides p ro p e r In terferen ce {w hen in stalled ) to h o ld low p re ss u re s , By d esig n in g th e b ack -u p p la te w ith a sh o u ld e r of p ro p e r d iam eter an d height, n o t only is th e cen terin g o f th e p ack in g autom atic, b u t a controlled s q u e e z e is a p p lie d on th e p ack in g to p rev en t it from w orking lo o se u n d er pressure. W h ere sh o u ld e re d p iston ro d s a re u se d , it Is reco m m en d ed th at an O -ring sta tic se a l b e in stalled to p rev en t le a k a g e alo n g th e rod- This elim in ates the n eed for em ploying the m ore exp en siv e tap ered piston rod en d s a n d p isto n a sse m b ly , W hen la rg e d ia m e te r c u p s a re u se d (4" O.D, o r over), se v e ra l e q u ally s p a c e d b o lts o r s c re w s a re reco m m en d ed In o rd e r to s e c u re th e c u p In stallatio n firm ly In p la c e . To In su re p ro p e r o p e ra tio n a n d long s e rv ic e life o f p isto n c u p p a ck in g s, avoid an y d esig n in w hich th e p a ck in g m u st p a ss ov er co rn ers, h oles, p o rts o r o v er a step diam eter arrangem ent. For b e st results cylinder b o res should b e finished to 16 RM S, CLEARANCES It is re c o m m e n d e d th a t the b a c k -u p p la te b e m a d e with c lo s e c le a ra n c e s a n d w ith s q u a re c o rn e rs to p re v e n t c u p ex tru sio n . E x cessiv e c le a ra n c e b e tw e e n it a n d th e cy lin d e r w a lls re su lts In e a rly c u p failu re, b e c a u s e of th e ex trusion o f th e heeJ o f th e cu p into the clearan ce g ap . C learan ces resulting from th e b o re d iam eter (cup siz e nom inal) and B d iam eter show n in th e table' o n p a g e 3 are rec o m m e n d e d for norm al o p eratin g p re ssu re s. T h e Inside follow er p late sh o u ld h av e c le a ra n c e a s in d icated by diam e te r A to p rev en t pinching o f th e lip a g a in st th e cylinder b o re. A controlled sq u e e z e o r co m p ressio n to th e bottom of a piston cu p is e sse n tia l. O v er-co m p ressio n Is th e m o st com m on c a u se of p rem atu re fail u re of pisto n c u p s. W hen th e bottom o r b a s e of th e cu p is co m p ressed , t h e m a te r ia l m o v e s o u tw a r d r a d ia lly . If m o r e s q u e e z e th a n r e q u ir e d to s e a l is u s e d , th e c u p m a te ria l Is f o rc e d Into th e b o re of th e c y lin d e r c a u s in g h igh friction, e x c e ssiv e w e a r an d p o ssib le toe-in of th e lips, RIGHT WRONG An in stallation s q u e e z e of ,005" to ,025" is all th a t is n e c e ssa ry to se a l the b ottom o f th e c u p to th e p isto n . T h is sq u e e z e c a n b e co n tro lled w ith a m tal sh o u ld e r o n th e piston, A m etal s p a c e r w a sh e r sh o u ld b e u se d if th e piston o r follow er d o e s not in c o rp o ra te th e shoulder. 2