Document dae7ykVGxpGLzn1vQpaNm2Y1e
FILE NAME: John Crane (JC) DATE: 0000 DOC#: JC055 DOCUMENT DESCRIPTION: Crane Sales Literature Part II
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: ail general services on valves handling high and low pressure steam, oif, water, air and ammonia.
SIZES
Bite
w Y iK ft Vi W,
Styles 8M-S15
S tyle 5 M
S ty le BIB
A r>proiim *te
F eet per Spool F eet p er Spool W eight per Spool
260 100
42 27 17 13
lib .
87
1 lb .
51
J lb .
38
1 lb .
20
1 lb .
18
1 lb .
Size
%' Yf fir % w K'
,, S tyle m . , B lytcSU
A w roxttotU
F e e t p e r S jmwI r e d per Spool IVeigU pee Spool
10
n
lib .
43
46
5 lb 5.
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 Bings 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 also 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-300.)
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-B 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.
J
7
I I
CRANE PACKING COMPANY
6400 OAKTON STREET, MORTON GROVE, ILLINOIS 60053 (C hicagoSuburb)
In C a n ad a : Crane Packing Company, Lid., Box 3243, Station C, Hamilton, Ont. In M exico: Industrias Jo h n Crane de Mexico, S .A . Poniente 152 '679 Industrial Vallejo, Mexico, D.F. In B razil: John Crane Industria E Comerclo, Lida. Avenida Jurubatuba 600, Sao Bernardo do Campo, S .P . In A ustralia: John Crane Mauri Pty,, Ltd., 166 Eldridge Road, Bankstown, Nevr South W ales, A ustralia In Europe: Crane Packing Ltd., Slough, Bucks, England In J a p a n : Jo h n C ran e Ja p a n , Inc., No. 6, Tenjinbashi>suji 6-chom e, O yodo-ku, O sa k a 531, J a p a n
O FFIC ES, W A R EH O U SES AND SERV ICE TH E W O R LD O VER
I I
Printed in U.S.A.
PACKIN G RIN G SETS
BULLETIN NO. P -394-1
CRANE PACKING COMPANY i
64 0 0 OAKTON STREET, MORTON GROVE, ILLINOIS 6 0 0 5 3 (C hicago S u b u rb )
In C a n a d a : C rane P acking Com pany, Ltd., Bo* 3248, Station C , Hamilton, Ont.
m
In M e x ic o : tn d u stria s Jo h n C rane de Mexico, S .A . Panlente 752 /679 In d u strial Vallejo, Mexico, D.F. In B razil; John C rane Indu3tria E Comercio, Ltda. Avehida Jurubatuba 600, Sao Bernardo do C am po, S.P. In A u s tra lia : Jo h n C ran e Mauri Pty., Ltd., 166 Eldridgo Road, Bankstown, New S o u th W ale3, A u stralia In E urope: C rane Packing Ltd., Slough, Bucks, England
In J a p a n : J o h n C ra n e J a p a n , Inc., No. 5, T en jln b ash l-su ji 8-chom e, O yodo-ku, O sa k a 531, J a p a n
O FFIC E S, W A R E H O U SE S ANO SER V IC E T H E W O R L O 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 temperature and pres sure encountered and the mechanical require ments of the equipment.
The sets are furnished pre-formed, pre-cut and pre-assembled to the proper I.D., 0,D., and stack height of the stuffing box dimensions. This eliminates the time and labor cost nor mally involved in forming, cutting and assem bling the correct num ber o f rings, ft also greatly reduces the chance of error by inexpe rienced maintenance personnel.
FOR HARDENED STEEL SLEEVES
Style 805-MBF (illustrated above at left): Made up of accurately die-formed rings. Packing is manu factured from the purest asbestos yarn with a monel wire insert, by the br2id-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 sleeves of 500 Brinell hardness or over.
FOR MEDIUM HARD SLEEVES
Style 1033 (illustrated above a t right); Recom mended for use on medium pressure centrifugal boiler feed pumps equipped with medium hard steel sleeves (270 to 500 Brinell). Set is composed of die-formed rings of Styles 101 and Super-Seal
No. 1 in a suitable assembly. (See Bulletins Nos. P-389 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 p ressure centrifugal boiler feed pumps equipped with bronze sleeves. S et 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-graphlted plastic packing.
When ordering sets, specify diameter of shaft, inside diameter and depth of box.
o
<)
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 Everseai "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-seaiing 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 iow temperatures up to 250 F. Style 823; Made of asbestos and rubber construc tion for high temperatures up to 350 F.
) When ordering sets, specify diameter of shaft, inside diameter and depth of box,
4
FOR RECIPROCATING AMMONIA COMPRESSORS (slowSpeed)
Style 751 (Illustrated above): Made up of dieformed 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 761 (Illustrated at right): Made up of machined split-babbitt rings held to the rod by coiled steel springs, Each babbitt ring is imbedded between tv/o property 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 Bulietin No, P-389,) Each ring is separated by oil-
proof gaskets. Recommended on rotary compressors handling ammonia, CO2 and Freon,
FOR AMMONIA VALVE STEMS
Super-Seal No. 1 valve stem packing in spool form is recommended for refrigerants such as ammonia,
Freon, CO2 and methyl chloride. (See Bulletin No. P-390.)
'S
When ordering sets, specify diameter of rod or shaft, inside diameter and depth of box.
f
% RECIPROCATING AND
f CENTRIFUGAL HOT OIL PUMP PACKINGS
RECIPROCATING PUMPS
FOR OIL OVER 450 F. -- MediumHardStesl Plungers
Style 1011 (illustrated above): Consists of alternate die-formed rings of Styles 605-0 and Super-Seal No, 2, (See Bulletins Nos. P-391 and P-390,) Rec ommended for use on stainless steel, medium hard cold-rolled 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.
I CENTRIFUGAL PUMPS
FOR OIL OVER 450 F. -- High Pressures (Hardened Steel Sleeves)
{
Style 101-AL (illustration)' Consists of accurately about a core of pure dry asbestos rovings. If
;
die-formed metallic packing rings made by spirally desired, each ring can be separated by a gasket
wrapping thin ribbons of soft annealed aluminum cut from oil-proof asbestos sheet packing.
foil loosely about a core of pure dry asbestos rovings.
Style 101-CU: Made up of accurately die-formed
Either set is recommended for use on pumps equipped with hardened steel sleeves (500 Brinell or more). Both will withstand temperatures up to
metallic packing rings formed by spirally wrapping thin ribbons of soft annealed copper foil loosely
1000 F,, pressures to 1500 psL and speeds to 4000 RPM, Packing rings are lubricated and graphited.
FOR OIL UNDER 450 F, -- Medium Pressures (Herd and Medium Steel 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,
!u
!
When ordering sets, specify diameter of rod or plunger, inside diameter and depth of box,
7 i--
EXPANSION JOINT PICKING S
Style 6-AM (illustrated above); Especially devel oped for high temperature, high pressure expan sion joints- Rings are made by braiding a jacket of pure asbestos yarn with monel wire insert over a non-metaIJic core of high temperature plastic.
FOR TEMPERATURES UP TO 1200 F.
Style 177-AJ; 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
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,
Packing remains resilient and presents a low fric tional wearing face, allowing joints to expand and contract freely without strain on the anchors. Rec ommended for expansion joints handling high pressure super-heated steam and hot gases.
bevels for concave-convex nest sets. Recom mended 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 tem peratures to 1200 F.
alkali or solvent services, either liquid or gas. Has temperature range of --100p F, to 4-6005 F.
VShen ordering sets, specify sleeve diameter and inside diameter and depth of box.
Prinled In U.S.A.
s e c . I CHEIWICAI P A C K IN G S
6 | LANTERN RINGS
BU LLETIN NO. P - 3 2 5 - 6
"John Crane" Chemlon Braided Packings are recommended for hot or cold add, alkali, corrosive, or solvent service--regardless of the concentration --a t temperatures from --X20F to +500F, They are particularly adapted to chemical, refining, paper, food or kindred industries. Completely nontoxic, they are perfectly safe for handling food products and related liquids or gases. Other advantages are a very low coefficient of friction and sub stantially longer service life over packings fabricated from other materials,
Chemlon Eraided Packings are constructed from either braided tape or fiber yarn, depending on service requirements. T hey assure maximum service life, since the packing remains intact, even though individual strands might wear away. Their construction provides maximum flexibility --so that even small rings can be formed without buckling the I.D. or distorting the O.D.--and also provides uniform density and a smooth wearing surface.
Types and Service Recommendations
1, Solid braided T FE tape -- for low shaft speeds or valve stems in highly corrosive service, 2, Braided, bleached TFE fiber yam -- for higher shaft speeds in highly corrosive service. 3, Braided asbestos with either surface lubrication or complete impregnation of TFE suspensoid -- for moderate, 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
Services
Style Temperatures No*.
Services
.... .....
Style Temperature i
Nos, '
"..1
CAUSTIC ALKALI SOLUTIONS
CHLORINE LIQUID AND BROMINE
CHLORINE (Gas) FOOD
...
.
GASES (Other than Oxygen and Halogens)
; INORGANIC ACIDS 1, Nitrating Acids
C-1030 C-1045 704 706 712 C-1050
-120 to 500 -120 to 500 -100 lo 500
0 to 300 -40 to 400 -120 to 500
C-1030 -120 io 500 C-1045 -120 to 500 704 -100 to500 C-1040 -1-32 to 350 C-06 -100 to 600 C-12 --100 to 600 C-1030 -120 to500 C-1045 -120 to 500 C-1050 -120 to 500' C-60 --100 to 600
C-1030 -120 to 500
C-1045 --120 to 500
706
Oto 300
C-1050 -120 to 500
C-1030 -120 to 500
C-1040 +32 to 350
C-1045 -120 to 500
710
Oto 125
C-1050 -120 to 500
2. fluorine-contain C-1040 +32 to 350
ing Acids
704 -100 to 500
706
Oto 300.
712 --40 to 400
3. All inorganic acids other than nitrating and fluorinecontaining acids
C-1030 C-1040 C-1045
704 706 710 712 C-1050
-120 to 500 +32 to 350 i -120 to 500. -100 to 500 :
Oto 300; 0 to 125 1 --40 td 400 --120 to 500-;.
*HYDROGEN
C-1030 --120 to 500 :
PEROXIDE(Strong) 712 --40 to 400'j
OLEUM
C-1030 --12to 500
(higher concen C-1040 +32 to350 !
trations)
C-1045 --120 to 500
710
OV tIoU 1X2fm5-J .
*0XYGN
C-1045 --120to 500 C-94 -100 to 600 704 -100 io 500
STEAM, AQUEOUS C-1030 -120 to 500 Solutions, Solvents C-1040 +32 to 350 C-1045 -120 to 500 j C-06 -100 to 600 C-12 -100 to 600 C-60 -100 to 600 C-1050 -120 to 500
*HOTBt Orderi row*/ ipedly Intended Unric to that rpeelel precaution can be token In handling and packaging la exclude aiganic mailer,
STYLEC-06-- Braided ,of high quality v/hifce asbestos yam, each'strand of which has first been impregnated with TFE. suspen soid. 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 -f-600*F.
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 raiige; --100*F. to -j-600*F.
Ring form, Style C-13.
style c-1030 -- Braided of bleached TFE 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 FFM, Tem perature range: --120*F. to -f-500*F.
Ring form, Style C-1031.
STYLE C-1040 -- Braided of bleached T FE multi-filament yarn and externally lub ricated with Fluorolube. For high speed applications and highly corrosive services. Recommended temperature range: 4-32*F, to -}-350sF,
Ring form, Style C-1041.
STYLE C-1045 --- Braided of bleached TFE multi-filament yarn and surface lubricated with TFE 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 4-500*F.
Ring form, Style C-1046.
Meets specification No. MIL-P-24393,
STYLE C-105C --*Braided of bleached TFE 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 -j-500*F,
Ring form, Style C-1051.
Meets specification No. MIL-P-24393.
STYLEC-io-- Braided of high quality white asbestos and impregnated throughout with TFE suspensoid and a special lubricant A dense resilient packing designed especially for paper mill applications. Temperature range: ~100*F. to 4-000'F.
Ring form. Style C-61. Braid-over-braid Style C-58 also available.
Meets specification No. MTL-P-24377.
STYLE C-94 -- Braided of AAAA asbestos yarn, each strand of which has first been lubricated with TFE suspensoid. Suitable for temperatures up to 4-600*F., oxygen or other gases.
Ring form, Style C-95.
Styles C-994 and C-995 -- low chloride.
style #704 -- Braided entirely of pure TFE, no lubricant. For highly corrosive services where any type of lubricant is undesirable. Temperature range: --100*F. to 4-500"F.
Ring form, Style #706.
STYLE #706 -- Braided of pure T FE and impregnated throughout with a special chemical resistant lubricant. Temperature range; 0 to 4-300'F,
Ring form, Style #707,
STYLE #710 -- Braided of pure TFE and impregnated with a lubricant especially suitable for use in nitrating acid services. Temperature range: 0 to 4-125'F.
Ring form, Style #711.
STYLE #712 -- Braided of pure TFE and lubricated with a non-hardening, nonmelting lubricant. Temperature range: --40F, to 4-4G0*F,
Ring form, Style #713.
NOTES; Ail of the above styles are available In spool or toil form from Vo" up. On high pressure pump applications, it is advisable to eUernaie thin Tf separator rings with any of the above packings.
U O H N C R A N E " C H E M L O N -- T h e Be st In T F E Fa c Kf n g s
"John Crane" Chcmlon. C-V Packing rings have proved to be the 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 most corrosive add, alkali, or solvent service conditions,
Cheralon C-V rings offer the advantages of a wide operating tem perature range from --120!?. to *f5G0F,, plus an extremely low coefficient of friction, "Breakout" 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 perm its positive sealing a t finger tig h t gland pressure. Also, this design provides a void between each ring to compensate for the relative Irigh coefficient of expansion in TFE.
Chemlon C-V rings are used in sets, th e number of rings dependent on the stuffing box length and pressures en countered, In all cases, a minimum of two pressure rings, together with male and female adapters, is recommended.
. ..100
' V a i V3
iy;:V*-VM:
' V* * Vi r Sciffi
g r* :' r *. 'A * 1
.150 ;;^o.:
1 1'/>
\'p W* '*&.!} \ ,200 w Vl
!.,:,10ff.:
i : ? m
r^'V*'$j;p - K 6 -i/iifet':
-.% *: w*
; % *j
.1*50
1825 -:
1U23
ft &.
- .??*
!$SI& , A i i i
- .200
m i$k\ ' /.?00 :
: :
. ?f- 1222 J
w25P
\
C 9-, i S Wh
:y,200 2P3 \
'SO/
/ f e i w ' ;-r.5; 2032 : ;.1^ 2 :; .300
v m - .% ; .
.200
<614
W* Vi > ;wo,
' m *\v>
.250 2230
. >200
i' a 2 i ,
\rixm m z -.".w ' ~,v <
,300:;., ; :
} . 3 i l :'y350
> 5<crt hu/flht of od moie adaptors il ,072", $jcc|< height of alt tomaie adaptors It seme c i width f cross loctian of fina
tJOTUSs (J ) In addition to the above slandor'd stock sites, molds to moke many other sixes are available, (2) All rings are endless rsnd can be diagonally cut with /son knife for Installation purposes Isen II Is not desirable or practical to diloirembfo the valve unit.
JOHN CRANE
CHEMLON-
For High Pressure Service
STYLE C-VH RINGS
This design incorporates a heavy wail and heel section necessary to withstand pressures up to 500 PS! and over ion pressures over 1000 P5I, metal adapters are recommended!. This packing is for high pressure application, suchas found in hydraulic cylinders and pumps.
QQfrZ:]
BPS
203$
mm* .2034;
: v* *;i.yi* -, 111
I ! Ite :
ii
te ll
KJ
* Slock hoishl of oil me)o odoplart 1 ,072", Slock hoighl of oil fo/nolo odoplor; l< coma a: width of rose section of ring.
T h e B e s t in T F E P a c k i n g
`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, AH of these packings are. recommended for safe and effective handling of acids, alkalis, solvents and hydraulic fluids in any concentration at temperatures from ~120F. fco+SQCPF.
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 resil ient 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 of 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 applica tions, For further particulars on filled TFE, write for our Bulletin T-127,
.
STYLE C-14--A hard endless packing ring, pro duced by forming wire-inserted asbestos yams,
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 w ith T F E euspensoid, around a mandrel and. molding to size.
For special applications, such 0 push-rod housing seals and for heat exchangers handling corrosive gases and liquids.
STYLE #772--D ie-form ed, re silie n t endless rings of interlocked shreds of pure T FE , 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 #772-5--Endless or split rings are mold ed of pure TFE 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 lubricant, Oiler 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 T FE rod o r tub ing and made to any design or configuration. Recommended for applications, where close dimensional tolerance are required, These are precision manufactured products.
J 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.
A'ate; Chemlon Molded and Machined Packing style* are sold by the ring. When ordering, accurately specify stuffing box f.D ,. O.D., depth, and bevels, if any,
1
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.
,
4 0 0 QAiXfQH &TR
Crane inPtaziti jtton'GntoilftdiiWto/
Jr A**l/sMw b n C m i t 'm t\ ?\
: ; JnJapanj JphirjCran*Japan,<rw,,.
O fiPiG S W t A t t n p V S S G A n O
^ ' V'--' -
Style C-1045
Style C-1045 is an improved Teflon multi-filament yam packing devel oped specifically for high spaed rotary services handling corrosive chemicals or solvents a t temperatures from --120F. to 50QF. Through a bleaching and shrinking process prior to braiding all carbonaceous material has been removed and greater dimensional stability gained. The results re;
1, L ittle 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 woven to elimi nate large voids, Bach filament or strand 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 th e 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.
Sires are available from A " to 34* in available in 1 and 5-lb, spools.
increments. Sizes from W to A*
1-LB, SPOOLS
5-LS, SPOOLS
COILS
Size
Approx,
ft. por spool
% 79 35 21 14 8 6 5
She
Approx. ft, per spool
I;V a "
393
183
05
70
40
30 25
Size
Approx, Approx, ft perlt. ft por coll
W
3,7
14
W
2,7
10
"/* .2.3
10
1.8
10
Bleached -Filament
Teflon* Yarn
*DuPont trademark
INTERLACED CONSTRUCTION ADVANTAGES
Greater flexibility than other braided packings--because the Smoother wearing surface and smaller surface interstices--
yarn* pass diagonally through the packing. Large tree* section the result o f tighter construction with each yarn locked into the
packing can be formed info small diqmcfer ring* vvifhool Buckling b a sic structure.
the l,P; or distorting iiHp 0 , 0 .
... ..... .. t
. . . . ........................ Maximum resilience--provided by the uniform Construction
Longer servicee-life--because the interlaced construction re-
v.:; ' ;
m ains intact evetnn if individual yarns on the l,D. w ear aw a y . *
*>fl'
Uniform densiftl yv tIlhirrnoVuignhlionuiitl itkhae npna.cUkninng^-n^rgAfenaUterfi unrumml bl felrf roiff ' # -. LLleisSsS* ga laa nndd ^add jpu ss tt mmeenntt---- tt he
and density of inf?r- ;.
corner and center waips} iresultf, in
diitriBufion if.,vam si s-i* -iace4^.dn*t^
provides long' serv ce wit ess a Went .on.
KEEP SHAFTS COOL, SEALS TIGHT, WITH "TEFLON" FIBER
Picking the right packing for almost any kind of service conditions is now an easy task ...if you use new, white fiber packings of "Teflon" TFE-fluorocarbon resins,
H ere's an improved braided packing--made completely from "Tefion,,--with a preshrunk yarn of "Teflon" fiber, specially treated to remove temperature-raising contaminants. And it's impregnated with 35 per cent by weight of TFE dispersion to better the seal and simplify break-in, without need for supplemental lubrication,
What's been happening in packings--Long processed into packings, "Tefion" 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 "Tefion" fiber is different from other TFE resin struc tures because the molecular orientation of the fibers gives them greater mechanical strength. For instance, the "Tefion" 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 "Tefion".
resin, has that cool, white look. Removal of heaf.generating partidec
means higher speed m e n added resin improves seat, reduces leakage.
Pre-shrmkirsg 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 TF 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 scaling qualities of this new packing.
Where to use new braided packing--Install new packing of
impregnated, braided "Tenon" 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 dale. In all these cases, "Teflon" fiber packings have proven to be a sound investment for the cost-minded engineer.
Some n e w designs--"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. 1) 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 of a combination set results in decreased wear, increased packing life and best of all-- lower leakage rates.
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--Typical Case Histories: "Teflon" Fiber Packing
Equipment item
Service
Operating Conditions
Pump
(M ilton Roy "C cftsU roetrie")
Hydrocarbon solvents, metal alkyls, metal halides
5/16-io, piston dia.; 4-12 sirokes/min.; 1,000psi.; 77*F.
Results Braidedpackingof'Teflon"TFEfiberimpregnatedwithTFEresin;isstill operating satisfactorily after 114 yrs. Previous packings lasted 2 to 6 mos.
Compressor
(W orthington piston type)
Anhydrous ammonia (Moisture content 5% or less)
2VHn. shaft; 7-in. stroke; (610 fpm,); 8 psi.; 6 rings
Braidedpackingof "Teflon"TFEfiberstill inservice without leakageafter 4mos.; "V" ringsmolded from shredded lead foil failed after 1-2 mos.
Heat exchanger
(floating head)
Autoclave (agitator shaft)
High pressure steam
200 psi.; %-in. packing; 6 rings
Braidedpackingof 'Teflon" TFEfiber eliminated leaksinheat exchanger used to vaporize nitro bodies, and is still operating after 1 yr. sendee. Previous packing failed after 2 mos.
Formaldehyde, sodium hydroxide, hydrochloric acid, acetic acid
4-in. shaft; 100 rpm, (100 fpm.); 221F,; Vt -in. packing; 15 rings
Braided packingof 'Teflon" TFEfiber impregnated withTFEresinstill operating satisfactorily after 11 mos. service despite excessive run-out of shaft. Best life obtained fromprevious packingwas3mps.
Centrifugal pump (Lj Bout PL-20)
Mixedacids; 90%cone. nitricand 35% cone, sulfuric acids
Wn-'m. shaft; 1750 rpm. (515 fpm,); %-in, packing; 6 rings
Packingset consistingofbraidedringsof "Teflon" TFEfiber alternated withrings of soft "Teflon" resin; was still operating satisfactorily after 6 wks. of no-leakage service. Previous packing lasted only 1 wk.
Centrifugal pump (DurironH5 trie s:
throttle hushing)
Oribo-dichlorpbenzene
254-in. shaft; 1750rpm, (975 fpm,); 150 psi,; 518F,
Braidedpackingof 'Teflon"TFEfiberusedas throttlebushingtomaintainpositive pressure on mechanical seal; 3tll operating satisfactorily after 7 mos. Carbon bushing lasted 2 mos.
Agitator shaft
(in fusion kettle)
Caustic solution
4-in. shaft; 158 rpm. (165 fpm.); 432T.; 6 rings of5/*-in, packing; 40 psi.
Previously used packing lasted l mo., but braided TFE fiber packing lasted 6 mos, without lubrication.
Agitator shaft
(in solvent still)
Organic solvents
4-7/16-in, shaft; 45 rpm. (52 fpm,); 212T.; 54-in, packing; 30 psi,
Previously used packing replaced every 2 mos,, yet never completely contained solvent fumes. PackingofbraidedTFEheld 8mos, withoutleakage.
Agitator shaft 0o sulfomtor)
Sulfuricacid and bromine
2-15/18'in. shaft; 60rpm. (45 fpm,); IS4F.; 54-in. packing; 50 psi,
Center bearing shaft froze each time drive shut down; repacked twice weekly. Braided packingofTFEstill inserviceafter 2 mbs.
Tamp rings very firmly in place in stuffing box, Tighten gland nuts before starting pump to squeeze impregoated 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
&
GLAND
SHAFT
T T /P
'j* 'j*
Sintered Teflon Rings John Crane 774
Resilient Packing of Teflon Fiber John Crane jfC-1045
<J/ %|/ 4f 4r
GLAND
FOLLOWER I2d g
r
' f
Excerpted with permission of the DuPont Company from (heir copyrighted article In Ilia "Journal of Toflan,"
Heat-Resistant Multi-Filament Teflon* Yarn
*D u P o n t tradem ark
Style 0-1050
Style 01050 is a soft multi-filament yarn braided packing that 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 adjustment.
3. Has greater resiliency than has been previously possible with this type of packing.
In addition, the clear and colorless lubricant combines with Teflon's outstanding inertness and non-toxic properties. This makes Style C-1050 ideal for food handling and processing equipment as well as concentrated acid service a t temperatures from --120 to -5-500 F,
Sixes are available from W to HHin to lA u available in 1 and 5-lb, spools.
increments. Sizes from W
1-1.8, SPOOLS
Size Approx, ft, per spool
7 S
It
vi
W
6
w
5
5-LB SPOOLS
Size
Approx, ft. per spool
390
170
* 18
25
COILS
fifxe
Approx. Approx. ft. per lb, ft, per coil
* / '
3.7
J4
2.7
10
2,3
10
W
i.e
10
INTERLACED CONSTRUCTION ADVANTAGES *. .
Greater flexibility than other braided packing--because the yarn pa diagonally through the packing. Large cross section packing can be formed into small diameter rings without buckling the 1.0. or distorting the 0 .0 .
Longer service-life--because the interlaced construction re mains intact even if individual yarns on the i,0 . wear aw ay.
Uniform density throughout the p ackin g-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#
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 m ost destructive acids, corrosives, alkalis and caustic solutions and will withstand extreme tem peratures 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 alm ost nonexistent, yet assu res 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 Ve" to \" in spools and V*' to 7/uin die-formed rings, both in increments of V\t>".
CRANE PACKING COMPANY
6 4 G O A ^T Q 'N S T R E E T ; M O R T O N G R V E , iik k lN lS SO .O S: (nlrwStkri
iff cw na Cm t: FuMii'j
C, M/ioillmh; Um-, '
t
lo MVit'IW InBjfjnti John Cr-B) tiv Mwea, $VA. - wmau; '11. W inufttMdl Vilcji fA.-/.ico, O.R
inVr'atU-.- Jcifif Crijv lhua|Wp,ECb^ftil.'il-' * Avvuinit JnMihatutw W i Smp HVfnw/to cib Ciw'fi, S.P.
jnAustralia:Simww ripmiPlV,>:W^;8S/e//dn'f lau,
>>9ijfj Kitim tifittu-, iri., Wo; 6;.Tiio)lnbiiihieii/| C-clin(ho. Qyaf'fth'fifv t , j'pan
awi'cfe,WAWM.'gatsfi ArtpeeRvice.th|wpRi;.R ovpt
d i s t r i b u t e !? b y
Printed U U.S.A
Lst Much Longer in Any Service
9 Corrosion Resistant
o 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 th at 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 held 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 Ne. M J M
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 Canada: Crane Pocking Company, Lid., Box 32, Slailon C. Hamilton, On!. In Mexico: Indust/Jas John Crane de Mexico, S.A. Ponienlc 152 *879 Industrial Vallejo. Mexico, O F. In Brazil: John Crane Industria E Camcrdo, Ltda. Avonida Jurubaluba 600. Sao Bernardo do Campo. S.P. In Australia: John Crane Mauri Pty., Ltd., 189 Eldrldgo Road, Bankstown, New South Wales, Australis In Europo: Cran Packing Ltd., Slough, Bucks, England In Japan: John Crane Japan. Ine* No. 8. Tenjlnbnuhl-suji 6`chcmo. Oyodo-hu, Osaka 631. Japan
OFFICES. WAREHOUSES AND SERVICE THE WORLD OVER
rtinted In V.B.A.
(CONDENSER TUBE PA CK IN G S FITTINGS AND PROTECTORS
BULLETIN NO. P-393-1
1
AND ACCESSORIES
CRANE PACKING COMPANY
6400 OAKTON STREET, MORTON GROVE, ILLINOIS 60053 (Chicago Suburb)
In C a n ad a : Crane Packing Company, Ltd., Box 3248, Station C, Hamilton, Qnt. In M exico: Industries John Crane dc Mexico, S.A , Poniente 152 1679 Industrial Vallejo, Mexico, D.F. In Brazil: John Crane Industria E Camerclo, Ltda. Avenida Jurubatuba 600, Sao Bernardo do Campo, S.P. In A ustralia: John Crane Mauri Ply., Ltd., 166 EldrJdge Road, Bankstown, New S outh W ales, Australia In Europe: Crane Packing Ltd., Slough, Bucks, England In Ja p a n : Jo h n C ran e J a p a n , Inc., No. 5, T enjlnbashl-suji 6-chom e. Oyodo-ttu, O sak a 531. J a p a n
O FFIC ES, W A R EH O U SE S AND SERVICE THE W ORLD OVER
Condenser Tube Packings
Style 602
Style 601-E
Style 603
Style 601-E Endless Metallic Rings are manufactured 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 metai. 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 v/aters or normal cleaning solutions.
Rings are available for all tube sizes and sheet drillings. Sizes Va", Ht" and Va" can be furnished from stock,
Styte 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 chemicai solutions used for tube cleaning. They can be accurately finished to any required size.
HIGH TEM P ER A TU R E
Heater Tube Packings
Syie 601-ECA
Style C-78
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 took 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 v/here 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 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.
T Wv. O-/ S T A' N, : D-Ay R; yDv' M ETH O D S FOR
CONDENSER T U B E S W355&I."?T,, H O U T * FERRULES
INLET END NEW CONDENSERS
FIG. A. inlet end rolled into the tube sheet and belied.
OLD CONDENSERS m s. Lead slugged fiber bushing on loading pin.
METHOD FOR 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 belied. (See Figs. Bthrough E.)
OUTLET END--Tube packed with John Crane Metallic Packing. (See Figs, F through J above.)
Advantages: (1) no ferrules required; (2) rapid installation; (3) inlet end fixed; (4) outlet end metallic 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.
OUTLET END NEW AND OLD CONDENSERS
HG, H. Second expansion ring ready to be caulked into place.
. Fm
Finished Outlet completed stuffing box. Packing locked in position,
Condenser Tube Packings
ADVANTAGES OF JOHN CRANE CO NDENSER 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 Not Affected By Contaminated Or Chemically Treated Water Last For Life Of Tubes
Condenser Tube Packing Tools
r v ..c
..... j ......... i _ _ 1
- ________ 1
PLAIN TUBE DRIVttIG TOOL
HAND INSERTION TOOL
UNIVERSAL TUBE DRIVING TOOL For driving tubes out of tube sheet.
Fits *6" through 1" tubes.
SELLING TOOL
LOADING PIN
REMOVALTOOL Cutters remove metallic or liber packing
without disturbing the tube.
PACKING EXTRACTOR TOOL For use when the tube has been removed. Drives into the packing tor easy extraction simply by turning the tool in a counter-clockwise direction,
SLOTLESS FERRULE WRENCH Requires only a slight turn of the back handle Jo grip slolless ferrule tightly. Ferrule is tightened or released by turning the large handle in the usual manner.
Super-Jet Condenser Tube Cleaner
The Super-Jet Condenser Tube Cleaner provides the fastest, sim plest and most effective method for maintaining maximum he2t 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, Bullet-shaped slug removes heavier or thick siime 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 UghW/eight gun weighs only 2% lbs. An operator can use it for lengthy periods without fatigue.
INTERCHANGEABLE SLUGS
Bulfet'Shaped for heavy or Scraper-lype for scale and
mineral deposits.
Printed in U.S.A.
I-
Condenser and Heat Exchanger Tube Protectors
NYLON POLYPROPYLENE TEE
j I I
CRANE PACKING COMPANY
64-00 OAKTON STREET, MORTON GROVE, ILLINOIS 6 0 0 5 3 (C h ica g o S u b u rb )
In C a n a d a : C rane Packing Com pany, Ltd., Box 3248, Station C, Hamilton, Ont.
In M e x ic o : In d u slrias Jo h n C rane do Mexico, S .A . P oniente 152 :679 Industrial Vallejo, Mexico, D.F.
I
In B ra z il: Jo h n C rane Induairla E Com erclo, l td a . A venida Ju ru b a tu b a 600, Sao Bernardo do C am po, S .P .
In A u s tr a lia : Jo h n Crane Mauri Pty., Ltd., 165 EJdridge Road, Bankstown, New S o uth W ales, A u stralia
In E urope: Crane Packing Ltd., Slough, Bucks, England
In J a p a n : J o h n C ra n e J a p a n , Inc., No. 6, T e n jin b a s h i-s u jt 5 -ch o m e , Q yodo-ku, O s a k a 531, J a p a n
O FFIC ES, W A R EH O U SES AND SERVICE TH E W O R LD OVER
lip
;
f
E A S Y T O IN S TA L L
NyJpn end Polypropylene Protectory:
y . ,;C,
A' Cleon tube end allow to dry. Lightly .mtcmarurwtttwK coot outer surface of tube protector
***?**
, -
j 8. Ppsh protector Into tube with l/gfjt,\
'!$*, sIppdy'p/eHvr*' m .......
JpE Protectoisf
, ......m / _.w.,%J, , .,r ... . John Crane JF Tube Protectors are"
manufactured so as, to press flt];:|n;i;;
the end of the tube. Just pushjnto.
tube with light, steady pressure,'
'. d
'
V'-vV
EXCLUSIVE JO H N CRANE SM OOTH FLOW 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
H I ossvtes m a x i m u m , I -^5? V |d^^|c> th Vr'aler f ) ^ ' eliminpfinr ^ '^ ' ' ' ""* ' 1"
Irfe dr
:. *.*.
' '.y- .
`
r>
I
SAVE THOUSANDS OF DOLLARS ANNUALLY IN SURFACE CONDENSER AND HEAT EXCHANGER MAINTENANCE AND REPLACEMENT COSTS
W ID ELY U SED IN M ARINE, UTILITY
and IN D U STRIA L PO W ER PLANTS
. . . EQ U ALLY EFFEC T IV E IN
CH EM ICAL PLANTS, R E F IN E R IE S
AND
G AS C O M P R E SSO R STA T IO N S
JOHN CRANE PLASTIC TUBE PROTECTORS oiler 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 impervious to the most destructive chemicals, corrosives and alkalis at temper atures up to 500'F.
SIZESi
lu b e Site
N ylo n
Protector Length P o ly p ro p y le n e
% " x 18 B W G W x 16 " % " x 18 " V*"%1b " V" x U "
l ,, x 13 " l"x 1 " 1" * M " "x10 " 2" x 8 "
6" 6" 4" 6 " b" b" b" b" --
4"
6" 6" 4" & 6" 6" b" b" 6"
4
Note: Other sizes can he made to order.
TP6
4" & " 6"
4 " & b". 4" & b" 4" & 6" 4" t 6" 4" & b"
b" 4" & 6"
--
NEW TUEES STAY THAT WAY
JOHN CRANE
ROTARY EXPANDING
TUBE END CLEANER
TheJohn Crane Cleaner has been specifically developed for old tube installations. It has a special cutting blade that cleans salt deposits, scale, etc. from the portion of the tube end to be covered by the tube protector. I t is designed so it cannot pass beyond this area.
The adapter end of the cleaner is threaded to 7/32"--24 U.S.F. gauge and will fit any small motor used for cleaning boiler tubes either direct or by using a flexible shaft.
Cementing of nylon and polypropylene tube protectors is recommended to pre vent their working out during backwash and cleaning operations.
Cement is easily applied with a small brush (see page 2). It bonds in seconds and dries to full strength in a very short time. Available in H pint cans.
Cementing of TFE protectors is not required, as they are made to a press fit.
H Crane Packing Company also manufactures a complete tine of
:
Expanding Tools and
*
Condenser Tube Cleaners
i Crane Packing Company trademark
Printed in U.S.A,
Form No, P -313
P L E A S E fi I K E F O I L
k k ' k k k k k k 'k k k i c k "k k
WING I NFORMATI ON
A, DEPTH OF DRILLING
_ ____________
B, DIAMETER OF COUNTERBORE ____________________
C, DEPTH OF T A P P I N G -------------------------------
D, OUTSIDE DIAMETER AND GAUGE OF TUBE
-------------------------------
E, NUMBER OF THREADS PER INCH ______________ ____ _
CONDENSER MANUFACTURER AND SERIAL NUMBER----------
NUMBER OF TUBESIN UNIT
ARE BOTH TUBE SHEETS DRILLED AND TAPPED
ARE TUBES FLUSH WITH FACE OF SHEET OR EXTENDED
ARE TUBES MEW, NECKED OR DEFORMED
INTEND USING FERRULES
WHAT CONDITION ARE FERRULES IN
SHALL WE FURNISH TOOL5
N A M E O )- E N G IN E E R
STR EET A DDRESS.
CITY.
Printed in U,S.A,
M ECH ANICAL PA C K IN G D IV ISIO N
C R A N E PACKING C O M P ^ f f Y i
,
,.&4 0 GL OAKTON STREET MORTON GROVE, ILUNOIS
SEC. I
g | HYDRAULIC PACKINGS
V-RING PACKINGS
GENERAL INFORMATION
John C rane V-Ring Packings are design ed for versatility, reli
ability, long life and low friction lo ad s in virtually all typ es of reciprocating motion applications. T h ese Include rod and p iston s e a l s In h ydraulic an d p n eu m atic c ylin d ers, p r e s s ram s, ja c k s an d s e a ls on p lu n g ers an d p isto n s in recip ro catin g pum ps. T hey are also readily suited to certain slow rotary ap p licatio n s su ch a s valve stem s. A vailable in a large selectio n of m aterials and designs. Jo h n C rane V-Ring Packings cover all operatin g conditions en coun tered in the fluid pow er
industry,
If split hom ogeneous V-Rings are u sed , and additional V-Ring should be added to the above.
With C hem lon (TFE) V -R in g s, It m ay b e d esira b le to U6e metal separator rings and m ale and fem ale adapters at pressures over 1000 PSI.
Everseal Fabric V-Ring Sets
Fab ric V-Rings are furnished split, u n less otherw ise specified. The following chart m ay be used for split V-Ring S e ts;
MATERIALS
T he w ide variety o f m aterials may b e generally classified into three categories; hom ogeneous rubbers, fabrics and Chem lon (TFE).
E a c h c a te g o r y of m aterial h a s c h a ra c te ristic s that m ak e It e s p e c ia lly su ited fo r certain op eratin g con dition s. In m any in stan ces, V -Rings of different m aterials can be used in a set com bination to gain the best advan tages of each, ,
0 to 1000 PSI ^ 4 Rings;
lOO.to ', ' 3oto A ; MODPSI'' . 3000 PSI 5000 PSI : .. . .PMW ,
5 Rings
6 Rings;!;; m m m
When endless fabric V-RIngs are used, fev/er rings are needed;
1500 to 0 to 1500 PSI 3000 PSI
3000 to 5000 PSI
50P0 to ! ; ^5iX) fl 7500 PSI ;
HOMOGENEOUS RUBBERS
3 Rings
4 Rings
5 Rings
6 Rings
T hese can be furnished to handle a range of operating con ditions from very low p ressu res to relatively high p ressu re applications. M aterials that will h andle tem peratures from sub zro to elevated conditions are availab le. The characteristics o f the rubber m aterial, itself, p rovid es a seal that is sen sitive to low p ressu re differentials.
One or m ore hom ogeneous V-Rings m ay be substituted for en d less fabric V-Rings in a set. When used, they should be
p laced toward the bottom (male) ad apter or Inboard end of the set. A fabric V-Ring should alw ays back-up a hom ogeneous V-fllng in com bination set.
FABRICS
Piston p ack in g s in a hydraulic cylin der m ay contain le ss VRings than shown ab o ve, sin ce sealing at this point Is not as
Fab ric p ack in gs a re usually con sid ered a s the h eavy duty type m ade to resist higher p re ssu re s and tough se rv ic e co n
critical a s a rod p acking and is usually satisfactory If no piston drift Is encountered under static conditions,
d itions s u c h a s m obile and mill typ e h yd rau lic c y lin d e rs an d
reciprocating pump applications, M aterials are available to
FINISHES
handle a variety of fluids and tem peratures.
The recomm ended su rfa ce fin ish es fo r optimum service life
In m any s e r v ic e s , fa b ric V -R ing s a re often u sed in com bination with one o r m ore hom ogeneous rubb er V-Rings to obtain the best quality o f both. Fabric V-Rings. b ecau se of their fibrous m ake-up, tend to resist extrusion. T he addition of ho m oge n e o u s V -R in g s to the s e t p rovid e fo r a m ore sen sitive s e a l,
o f V-Ring packin g s e ts, reg a rd less of m aterial, Is 16 micro-
inch es RM S (max,) for dynam ic su rface s against which the packing m oves and 32 m icroinches RM S (max.) for static sur fa c e s which the packing contacts. If rougher surface finishes a re used, the service life and sealing efficiency of the V-packing se ts will b e reduced con sid erab ly. '
C hem lon (T FE) V-Rfng p a c k in g s c a n b e m an ufactured in d if ferent w a ys, ea ch resulting in a p rod uct with individual ch a r acteristics, B ecau se of the chem ical inertness of ibis m aterial, it provid es the solution to difficult and extrem e chem ical and tem perature operating conditions that cannot be handled with other m aterials.
RECOMMENDED NUMBER OF V-RINGS IN A SET FOR VARIOUS PRESSURES
H om ogeneous Rubber an d /or Chem lon (TFE) V-Bing S e ts;
GLAND OR STUFFING BOX LENGTH
T o calculate the proper confined height of a V-packing set (the length of the s p a c e into w hich th e'V -p ack in g set will be in stalled), add the nom inal stack height o f all of the component parts of the set, Including both ad apters and V-Ringa. Add the p lu s toleran ce sp e cifie d for e a ch Individual part in the set to this total. The resultant figure will represent the length of the stuffing box, T his when added to the required plus toler an ce n e ce ssa ry for m achining the m etal parts will give the confined stack height.
0 to 500 PSI 3 Rings
500 to 1000 PSI 4 Rings
1000 to 3000 PSI 5 Rings
PUMPS VS, CYLINDERS
Although the operatin g con dition s m ay b e sim ilar in a recfp-
rocating pump and a hydraulic cylinder, the packing perform ance may not be equal. Pump packings are usually subjected to greater mechanical loads, as evidenced by the wear pattern 180 apart on a used packing set. This v/ear pattern is in the same plane as the rotation of the crankshaft, and the action of the crankshaft is not entirely eliminated by the crosshead. Gen erally, it is necessary to add additional V-Rings to a pump packing set to compensate for these mechanical loads.
DESIGN AND INSTALLATION When It is necessary to Install V-Rings over or through threaded surfaces or other sharp projections, be sure to provide ad equate clearance between diameter of packing ring and pro jection, A diametrical clearance of .060" is recommended. Stuffing box or cylinder bore and the piston rod should have a 30 x 1/16" minimum chamfer at its entrance to facilitate installation and eliminate possibility of damage to sealing lips of packing. Bevel, burr or undercut ail sharp edges and corners in packing area at time of manufacture. In reciprocating service, avoid any design In which the V-Ring must pass over corners, holes, ports or over a step diameter arrangement.
Do not design an installation so that bottoming or other me chanical loads are transmitted to the packings. Packings are designed to seal fluid pressure only--not to act as bumpers. When determining rod or piston bearing areas, do not include packings and adapters in calculations, as they are not designed to take bearing loads. Ail packing rings should first be lubricated with a material non-lnjurious to the packing. Split rings should be installed so that joints on successive rings are 130 apart, then 90 (see page 7). Joints should never be placed oyer or near each other. Ends of ail cut rings should be opened sideways when being placed around rod. Rings are furnished cut to fit and should not be trimmed, since the slight overlap at the joints is necessary for satisfactory sealing. On installations where pressure is exerted in both directions, such as double-acting cylinders, opposing sets of packings should always be installed so that the sealing lips face away from each other. The female adapters should be located adja cent to a fixed or rigid part of the piston or gland so that no pressure loads will be transmitted to the other set of rings. When installing endless rings, a means must be provided to eliminate the air cushion which becomes entrapped between the rings when they are inserted into the stuffing box. To do this, collapse a short section of the sealing lip by inserting a thin brass or plastic rod between the packing ring and stuffing box wall. Care must be exercised to avoid injury to ring lip or box wall.
ADAPTERS
Both male and female adapters must be used with V-Ring sets
to properly support and back-up the packing, For special applications, metal, laminated phenolic or other hard ma terials may be used for the male and female adapters. In applications where side loads are present or where mechanical ioads of any kind will be applied to the packing, hard adapters should' be used. The male adapter must be made of a rigid material if spring loading is to be applied to the set, (See back page for dimensions on machining adapters.)
For high pressures or v/hen surge or shock pressure conditions exist In the system, it is recommended that a close fitting metal or phenolic bushing be used behind the female adapter as a back-up and anti-extrusion device. This will allow the female adapter to flex under the pressure or shock load, but will pre vent it from extruding and fracturing.
SPRING LOADING V-PACKING SETS The use of springs to preload V-packing sets can have definite advantages; however, each application must be considered on its own merits, taking into account the specific operating con ditions involved. Springs are not generally recommended for high speed or quick reverse motion on reciprocating applications. Plunger pumps fall Into this category. High speed may cause the packing to shift or "bounce," allowing fluid to by-pass the packing. As a rule of thumb, spring loading for a fabric or homogeneous V-packlng set can be figured on the basis of 5-pounds per linear inch or mean circumference, V-Ring sets of TFE, whether C-VU, C>VH or standard AN design, require a heavier spring load. A 10-pound spring load per linear inch of mean circumference should be used with a minimum total load of 15 pounds. Using the above zs a guide, the following must also be con sidered; Number of V-Rings and the cross-section of the set, speed of operation and the primary reason for the use of the spring loading in this particular unit. Evidence gathered through field experience and laboratory tests Indicates that spring loading is not necessary in most ordinary hydraulic and pneumatic cylinders being manufac tured today. If a V-packing set is properly designed to fit a fixed glaoo dimension and installed properly, extended service life and proper sealing will result without the use of springs.
If the man requirement of a spring is to adjust for differences in stack heights of sets, a wave spring can be used and acts essentially as an "adjustable shim." Split wave springs serve well for this purpose; however, a wave spring's compensation for wear is minimal.
Springs are not a stock item but may be ordered through your local spring manufacturer or supplier. When a recommenda tion for spring loaded hydraulic packing is required, forward the request to Crane Packing Company, along v/ith all the operating conditions and other information indicated on our Hydraulic Packing Data Sheet No. P-345,
H O M O G EN EO U S V-R IN G S
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 genera! services, an all-purpose compound that effectively handles 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 psi. 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,
I
STANDARD SIZES
INTERFERENCE -*> HEEL
CLEARANCE
( G L A N D WIDTH)
B STACK HEIGHT
FABRIC V-RSNGS
John Crane Fabric V-Rings are recommended for liquid and gas service on aii 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 and hy draulic cylinder applications and are available in a
number of compositions covering an exceptionally wide range of operating conditions.
Fabric V-Bings 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.
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
b
On split packing installations no gland pressure is re bolted down metal-to-metal on shims.
quired to effect a seal in the packings themselves. How
ever, lightgland pressure is usually required to seal the Crane Packing Company can provide complete engi
Joints, If light pressure will not produce the desired seal- neering service and recommendations upon request.
DESIGN FEATURES
1, Pressure access allows immediate pressure distribution and packing response,
"BaiMojlnt" nesting surfaces facilitates breathing without pinching, wedging or lip collapse.
Adequate Jubricaliorireservoir.
Uniform bottom thickness eliminates weak points and insures centerilne hinge action,
Mofded-in Up interference insures tight static seal and conformation to bore and rod deflections.
Heei clearance prevents "riding" at heel and eliminates Up toe-in.
The fabric in the V-Rings is so (aid to assure mximum
strength --. an important consideration for maximum
packing life.
\ :/Vj.-.;./
.''V'
1'.: -' ' . '
DIMENSIONAL DATA
Nominal Packing Space
Me lA Me % Me V2 Me % il6 *A % % JMe
1
Height of Adapters
+ .1 3 8
.312 .375 .438 ,500 ,563 .625 .687 .750 ,813 ,875 .938 1.000 1.062 1.125
1 - _] e
i A ]h - H-c-*
Stack Height V-Hing
.+,020
A-H 00
,093 ,125 ,156 ,187 ,218 ,250 ,281 ,312 ,343 .375 ,406 437 .468 ,500
Overall Height V-jRJng 4-.020
?-.0 0 0
.142 ,194 .245 .280 .332 ,387 .431 ,435 ,533 ,571 ,615 ,669 .710 .765
Stack Height F, Adapter c 4-,020 c - .000
.187 .250 .313 .375 ,438 .500 ,562 ,625
.688
,750 ,813 .875 .937
1,000
INSTALLATION DETAILS FOR FABRIC REINFORCED BRINGS
INSTALL MALE OR BOTTOM ADAPTER RING FIRST.
LEAD-IN CHAMPHER
STATIC SURFACE FINISH-- 32 RMS
DYNAMIC SURFACE FINISH-- 16 RMS
STAGGER ALL JOINTS ALTERNATELY ISO*, THEN 90*. RINGS SHOULD OVER LAP SLIGHTLY AT JOINTS
DON'T CUT RINGS,
INSTALL FEMALE OR TOP ADAPTER RING LAST,
SHIM
GLAND SHOULD FIT SN UG AGAINST PACKING, IF NECESSARY TO PREVENT CRUSHING THE RINGS, USE SHIMS AT THIS POINT.
NOMINAL STACK HEIGHT (See Page 6 For Tolerances)
Nomina
if Height
PacfcWg ' Height.^ .
Of ? '
Space V V-Ring p Adapters-P;
Ho
.093
,312
V i
.109
.344
Va
.125
,375
%2
.140
.406
Vi*
.156
.437
"2
.171
,469
%
,187
.500
l%2
.203
.531
Vie
,218
,562
'H i
.234
.594
Vz
,250
.625
%2
,265
.656
%0
.281
,687
%
,312
.750
%
.328
,781
"Ho
.343
,812
%
,375
,875
'H o
.406
,937
%
.437
1.000
'H e
,468
1.062
1
,500
1.125
'P. . /! 1 Tl Ring .41 ,50 .45 .56 .50 .63 .55 .67 .59 ,75 .64 ,81 ,69 .87 ,73 ,34 .78 1,00 ,83 1,06 ,83 1,13 ,92 1,19 .9 7 1,25 1.06 1,37 1,11 1,44 1.56 1,50 1.25 1,63 1.34 1,75 1,44 1,87 1.53 2,00 1.63 2,13
Total,Stick Height (Includes Adapters And V-Rings As Indicated)^
: 4 "
V-V, 6;;v.v:v;
Rings Rings : Rings Rings Rlngs Rings
.5 9
,68 ,78
,87
,96 1.06
.67 .78 .89 1.00 1.11 1.22
.75 ,88 1,00 1.13 1.25 1,38
.83 .97 1,11 1.25 1.39 1.53
.91 1.07 1.22 1.38 1.53 1,69
,98 1.15 1.32 1,50 1,67 1.84
1.06 1,25 1.44 1,62 1.81 2.00
1,14 1.34 1,55 1.75 1.95 2.16
1,22 1.43 1,65 1,87 2,09 2,31
1.30 1,53 1,76 2.00 2.23 2.47
1.38 1.63 1,88 2,13 2.38 2,63
1,45 1,72 1,98 2.25 2.51 2.78
1,53 1,81 2.09 2.37 2.65 2.94
1,69 2.00 2,31 2.62 2.93 3.25
1,77 2,09 2,42 2.75 3,08 3,41
1,84 2,38 2,53 2.87 3,21 3.56
2.00 2,38 2,75 3.13 3.50 3.88
2.16 2.56 2.97 3.37 3.78 4.19
2.31 2.75 3.19 3,62 4.06 4,50
2.47 2.93 3.40 3.87 4.34 4.81
2.63 3.13 3.63 4.13 4.63 5,13
#;.vt i f i l i gp p
Brtgsv | K $ 1,15 1.24 1.33 1.44 1,50 1.63 1,67 1,81 1.84 2.00 2.00 2.18 2.18 2,37 2.36 2,56 2.52 2.74 2,70 2.93 2,88 3,13 3.04 3,31 3,22 3.50 3.59 3.87 3.73 4.06 3.90 4.24 4,25 4.63 4,59 5.00 4.93 5,37 5.27 5,74 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 -- 1209 F, to -f-500p 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 Pressure Service A very sensitive and resilient type packing that is particularly suited for use In control or regu- latdr valves handling gases or fluids.
STYLE C-VH RINGS For High Pressure Service
This design Incorporates a heavy wall and heel section
necessary to Withstand pressures up to 50q PSJ and over.
On pressures over 1000 PSI, metal adapters are recom
mended. {Sea back cover.) ...
C-VH Rings are recommended for high pressure applica tions such as hydraulic cylinders and pumps.
-r
ALWAYS C ttA M THAN STUffIMG BOX CP.0 5 S. SECTION
y/ yX 4
yyi /J 7 V j. ,
\y y y { 7
xZA
XA l Vo l MX Fo* ______ J" "j
stack h eig h t
f NOMINAI RADIAL THICKNESS
C-VU RING CONSTRUCTION
r
A LW A Y S v y y y w /y ffi, 7 h a c k
CSEATEi THAN S T U F F IN G BOH CROSS' 5ECTION
v /y y f vvyj ty f yf /
\ s /y , l height
x v /, * M,/'
v>
i 0f l nom in a l
Y J X RADIAL
______ j
T H IC K N E S S
* -------- R ---------- i
C -tIH RING CONSTRUCTION
STACK HEIGHTS
and
ADAPTER
DIMENSIONS
(Styles C-VU and C-VK BJnps and Sets)
RAi-
Nominal Packing
.
stack Height.
Height Of
W n t Adapters
At-M O "
1 ' R ig
Total Stack Height (Include* Adapters atid V^ings a* Indicated)
.* -
'!? ** ,, .
. .
. - *
T.*': .. *." 1 (:IW-7W. :' "Aej`r. '.
. _ .
.. * 'i'.-V;
1 **
~.w ': iOw Vi% .v."'V/
.3
4
5 a
rr & " 9 ,`V10
Riwfrf Rigs
Rings
vRiflES
Rings
-* M'iT? W^V\
Vs .100 .125
3Ao .150
V22 .175 H .200
%2 .225 f a , .250 1J/32 .275 % .300 % .325 716 .350 % .375 l/z .400 % .425 V\6 .450 % .500 2lA z .525 % .550 2A .600
W u .650
Vs .700 Wo .750
l .300
,197 .223 .260
,291 .322 .353 .335 .416 ,447 .473 .510 ,541 .572 .603 .635 .697 ,728 .760 ,322 .335 ,947 1,010 1,072
.297 .353 .410 ,466 ,522 .573 .635 .691 ,747 ,803 .860 .916 ,972 1.023 1,085 1.197 1.253 1.310 1,422 1,535 1.647 1.760 1,372
,3 9 7 .497 .597
,478 .603 ,723 .560 .710 ,860 ,641 .816 .991
,722 .922 1,122
,303 1.023 1,253 .885 1.135 1,335
,966 1.241 1.516
1,047 r 1.347 1.647 1,128 1.453 1,778 1,210 1.560 1.910 1.291 1.666 2.041 1.372 1,772 2.172 1,453 1.373 2,303 1,535 1.935 2.435
1,697 2,197 2,697 1,778 r 2,303 r~2.S23 1,860 2.410 2,960 2,022 i 2.622 3,222 2.135 2.835 3,485 2.347 3,047 3,747 2,510 3.260 4,010 2,672 3.472 4.272
.697 .853 1.010 1.166 1.322 1.478 1,635 1.791 1,947 2.103 2.260 2,416 2.572 2.723 2,885 3.197 3,353 3.510 3.322 4.135 4.447 4.760 5.072
.797 ,978 1.160 1.341 1.522 1.703 1.885 2,066 2.247 2,428 2.610 2,791 2.972 3.153 3,335 3.697 3,873 4.060"] 4,422 4.785 5,147 5,510 5,872
.897 1.103 1,310 1.516 1.722 1.928 2.135
2.341 2.547 2,753 2-960 3,166 3.372 3.578 3.785 4.197 4,403 4,610 5,022
5,435 5.847 6.260 6.672
,997
1.228 1.460 1.691 1,922 2.153 2.385 2,616 2,847 3.078 3,310 3.541 3.772 4,003 4.235 4.697 4.723 5.160 5-622
6,035 6,547 7.010 7.472
1.097 1.353 1,610 1,866 2.122 2.378 2.635 ["2.891 r 3,147 3.403 3,660 3-916 4.172 4.428 4,685 5,197 5,453 5,710 6.222 6.735 7.247 7.760 8.272
1,197 1.478 1.760 2.04 2.322 2,603 2,835 3,166 3,447 3.728 4.010 4.291 14,572 4,353 5;135 5,697 5,978 6,260 6.822 7,385 7.947 8.510 9.072
MOTE; 1, Slack height of sets should be measured v/ith a m inim um of JO pound load applied to set In unconfined state.
2. Minimum of three pressure rings per set recommended If space permits,
STANDARD SIZES (C -V U a n d O V H R in g s and M a la a nd Fe m a le Adapters.)
Homlntt BXa**.
10.1 A
1/3 X 1/3 X 1/3 X 1/8 X 1/8 X
p
5/16 3/3 7/16 1/2 5/3
Size Stack Mold f*>. Ht Style
`V,;
"W (IN'
25 ,075 26 ,100 27 ,125 28 ,150 210 ,200
X X XX XX X--
1/8 X 11/16 .1/16 X 3/8 3/16 X 7/16 3/16 X 3/2 3/16 X 9/16
211 ,225 36 ,075 37 ,100 33 ,125 29 ,150
3/16 X 5/3 310 .175 3/16 X 11/16 311 .200 1/4 X 7/15 47 .075 1/4 X 1/Z 48 .100 1/4 X 9/16 49 .125
X , ,1 XX XX XX X--
X ,,
X XX XX XX
1/4 X 5/3 410 ,150 1/4 X 11/16 411 .175 1/4 X 3/4 412 .200 1/4 X 7/3 414 ,250 5/16 X 1/2 53 ,075
XX X MW XX XX XX
5/16 X 9/16 59 ,100 5/16 X 5/3 530 .125 5/16 % 11/16 511 -ISO 5/16 X 3/4 512 ,175 5/16 X 13/16 513 .200
XX XX XX XX XX
5/16 xl 1/8 13 ,325 3/8 X 9/16 69 ,075 3/8 X 5/3 610 ,100 3/8 X 11/16 611 ,126 3/8 X 3/4 612 .150
XX XX XX XX XX
3/8 X 13/15 613 .175
3/8 X 7/3 614 ,200
3/8 xl
616 .250
3/8 xl -1/3 618 ,300
7/16 X 5/3 710 .075
X ---r XX XX X XX
7/16 X 11/16 711 .100
7/16 X 3/4 712 ,125
7/36 X 13/16 713 .150
7/16 X 15/16 715 ,200
7/J6 xl
716 .225
XX XX XX XX X ---
7/16 xl -1/8 713 ,275 1/2 X 3/4 812 ,100 1/2 X 13/16 313 ,125 1/2 X 7/8 314 ,150 .1/2 X 15/16 215 .174
XX XX XX XX XX
Nomina) Size
Boa Size
0,
10 00
l/Z *1
816
1/2 *1,1/3 313
1/2 *1-1/4 820
9/16 x 13/16 913
9/16 * 7/3 914
9/16 * 15/16 915
9/16 xl
916
9/16 *1-1/16 917
5/3 * 13/16 1013
5/8 * 7/8 1014
5/3 * 15/16 1015
5/3 *1
1016
5/8 *1-1/3 1033
5/8 *1-3/16 1039
5/8 *1-1/4 1020
5/3 *3-3/8 1022 5/8 *1-1/2 1024 13/56 *1-1/16 1117 11/16 *1-1/3 1113 11/16 *1-3/16 1119
11/16 *1-1/4 1120 3/4 xl-1/15 1217 3/4 *1-1/3 1213 3/4 *1-3/16 1219 3/4 *1-1/4 1220
3/4 *1-5/16 1221 3/4 *1-3/8 1222 3/4 *1-1/2 1224 3/4 *1-5/3 5226 13/16 *1-5/16 1321
13/16 *1-3/3 1322 7/3 *1-1/4 1420 7/3 *1-3/3 1422 7 /3 . *1-1/2 1424 7/8 *1-5/3 1426
15/J8 *1-7/16 1523 15/36 *1-1/2 1524 15/16 *1-9/36 1525 1 *1-3/15 1619 1 *1-1/4 1620
1 *1-3/8 1622 1 *1-7/16 1623 1 *1-1/2 1624 1 c *1-9/16 1625 1 . *1-5/8 1626
Stack Ht
,200 .250 ,300 .100 ,125 .150 .175 .20 0 .074 .100 .124 .150 .ZOO .225 .250 .300 .350 ,150 .175 .200 ,225 .125 ,150 ,175 .200 ,225 ,250 ,300 .350 ,200 ,225 .150 ,200 ,250 ,300 .200 .225 .250 .075 .100 ,150 ,175 ,200 ,225 .250
~ Mold Style .
XX XX X XX XX
XX XX XX XX XX
XX XX XX X X--
X X
_.
XX
XX
XX
X_
XX XX XX XX
X XX XX XX XX
XX XX XX X XX
X X
X X X--
X.
X XX XX X
Nominal Size Stack Meld Bp* Size,/. No, Ht Style
ID 00:.
"H"
1
*1.3/4 1623 ,300
1
*1.7/3 1630 ,350
1-1/16 *1-9/16 1725 ,200
1-1/16 xl-11/16 1727 ,250
1-1/16 *1-13/16 1729 ,300
1-1/3 *1-3/8 1822 .100 1-1/3 *1-1/2 1824 .250 1-1/3 *1-5/8 3326 .200 1-1/8 *1-11/16 1327 .225 1-1/3 *1-3/4 1820 .250
X X
>X--
XX
XX
XX
X ,r
X
X X
--X
XX
1-1/8 1-1/8 1-1/3 1-1/3 1-1/3
*1-7/3 *2 *2-1/2 *2-1/4 *2-3/8
1830 .300 1822 .350 1834 .400 1835 ,450 1338 ,500
X X
--Xe
XX
X
X--
1-3/16 *1-1/2 3924 .125
1-3/16 *1-13/16 1929 .250
1-2/16 xl-7/2 1930 ,275
1-2/16 xUS/16 1931 .300
1-3/16 *2
1932 .325
X
X
X X
--X
X--
1-1/4 1-1/4 1-1/4 1-1/4 1-1/4
*11/2 *1-3/4 *1-7/3 *2 *2-J/3
2024 ,100 2023 ,200 2030 ,250 2032 .300 2034 .350
X XX XX XX --X
1-1/4 *2-1/4 1-5/16 *2 1-3/3 *1-3/4 1-3/3 *1-7/3 1-3/8 *2
2036 .400 2132 ,275 2228 ,150 2230 ,200 2232 .250
X X X XX XX
1-3/3 *2-1/3 2234 -300 1-3/2 *2-3/16 2235 .325 1-3/2 *2-1/4 2236 .350 1-3/3 *2-1/2 2240 ,450 t-7/16 *1-15/16 2331 .200
X X
r--X-
X
X
X--
1-7/36 *2-1/16 2233 ,250
1-7/16 *2-3/16 2335 ,300
1-1/2 *2
2432 ,200
1-1/Z *2-1/3 2434 .250
M /2 *2-1/4 2436 ,300
1-1/2 *2-1/2 2440 .400 1-5/8 *2-1/4 2636 .250 1-5/8 *2-3/8 2633 .300 1-5/2 *2-9/15 2641 .375 1-5/8 *2-5/2 2642 .400
X X
aXw
XX
XX
XX
X J--
XX
X X
--X
X--
?di.t !?n. t0 t,,e ab0^ 5tanc)^ d stock sizes, molds to make m any other sizes a rt a rail able. (2) All rings are endless and can be diagonally cu t with pen knife for instal lation purposes when it is not desirable or practical to dissassem ble the valve unit, *
Nominal J. , Bex Size:
:,a 'ip ; : p b ; '
Site Stack
No; H,<t*>:.
iflsiB !&:<
/ "!`Wr Mjj|H
1-11/16*2.7/16 2739 ,300 I-11/16*2-3/2 2740 .325 1-3/4 *2-1/4 2336 .200 1-3/4 X2-3/8 2833 .250 1-3/4 X2-1/2 2840 ,300
1-3/4 1-7/8 1-7/8 1-7/8 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
XX
X X
WWW
XX
XX
Xr
X X X XX
2 2
*2-5/8 3242 .250 *2-11/16 2243 .275
X X
,--X
2
*2-3/4 3244 .300 X X
2
*2-7/8 3246 .350 X
2
*3
3248 .400 X --
2-1/6 *2-13/16 3345 .300
2-1/3 *2-7/8 3446 .300
24/8 *3
3448 .350
2-3/36 *243/16 3545 ,250
2-3/15 *3
3548 ,325
X X
--
X
X
--X
2-1/4 X2-7/8 3646 ,250
2-1/4 x3
3643 ,300
2-1/4 x34/4 3652 .400
2-3/3 *34/8 3250 .300
2-7/26 *3-7/16 3955 .400
XX XX XX XX X --*
2-1/2 *3
4048 ,200
2-1/2 *3-1/3 4050 .250
24/2 *3-1/4 4052 .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 *3-3/3 4254 ,300
H2-3//44
*3-1/4 *3-3/2
4452 ,200 4406 ,300
3
*3-3/4 4360 ,300
3 3-1/8 3-1/8 3-1/4
*4 *4 *4-3/8 x4
4864 .400 5064 ,350 5070 .500 5264 .300
X
X X
--*
~~- X
XX
X a--.
X X X *m0am*
TEMPERIZED STYLE 775-T V-RINGS
Nominal'
M a
Stack Height
% ,130 .083 ,192 ,083
*/4 .255 .083 .317 .140
3/s .380 .156
.442 .197
% .505 .197
Nolo: Dimensions are in inches
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 impervious to practically all chemicals, corrosives and solvents over a wide temperature range from --120 to +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 promoted and packing life is increased many times over.
Temperized Style 775-T V-Rings are manufactured in production quantities only. They are designed to AN specifications and are available in a range of sizes as shown in the Dimensional Data Table.
i/p x 1 X . 0 8 3 % 6 x 1M x .0 8 3 % x lV g x .083 34 X 11/4 x , 0 8 3 % x m x ,083
1
x i y 2 X .083
V6 x l% 6 x .0 8 3
11/4 x 1 3 4 x . 0 8 3
i y 4 x 1 % x ,140
13/s x 2 x . 1 4 0
STANDARD SIZES (AN Design)
11/2 x 2 x ,0 8 3 l*/ 2 x 2 1/2 X , 1 4 0 1 3 4 x 21/4 x . 0 8 3 i y 4 x 23/g X , 1 4 0 1 % x 2 1/2 x . 1 4 0
2 x 2 1/2 x . 0 8 3
2
x 2 % x .140
2 i/ g x 2 3 4 x . 1 4 0
2y4 x 2 % 2 i/ 4 x 3
x .140 x .140
2 1/2 X 3 x . 0 8 3 23/g x 3 x .1 4 0 2 1/2 x 3 y s x , 1 4 0 2 1/2 x 3 i/ 4 x . 1 5 6 2 % x 3 1/4 x . 1 4 0
2 3 A x 3 1/2 x . 1 5 6
3
x 334 x .156
3 i/ s x 3 7/q x . 1 5 6 33/g x 4 x .1 4 0 3 1/2 x 4 y 4 x . 1 5 6
33/4 x 4 1/2 x . 1 5 6
3 % X 434 x .197
4
x 4 % X .197
4 y 4 x s y 8 x .197
4 1/2 x 5 x . 0 8 3
4 1/2 x 53/g x . 1 9 7 4 3 4 x 53/s x . 1 9 7 5 14 x 5 % x .1 4 0 534 x 6 % x .140 6 1/2 X 7 y 8 x . 1 4 0
1 , An induced elastom eric action at normal operatine tem perture cause the I.O. a n d 0 ,0 , tip s to expand to Insure maximum sealing on both the rod end ih cyJ. Inder all.
2 . Consistently sharp lips provide a positive seal un der both static or dynamic conditions.
3 . C o m p le te uniformity through precision dies that resu lt in bolter overall tt\inz performance.
4 , More com pact install, tion in th a t ices stack heigh! is required than with o th er type V 'B ings.
5 , Practically unlimited storage life w ithout loss of dim ensional stability or other properties.
10
STYLE C-78V ASBESTOS TFE V" RINGS C-VH and AN Design
o Style C-7SV 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 well 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
f i S t Sfcwci a n
v -S ta c f
mm
He
He 450" 1% 2 3 /s 3 0 0
Ya
5/s 4 5 0 1% 2 1 /4 .200
; (
He He 4 5 0 1% 23/4 ,400
%
4.50 1 % 2 % .300
Yi* He 4 5 0 V/s 21/4 ,150
. '% 7/s 4 5 0 2
2 3 /4 .300
% X 450 2
3
,400
%
V /s ,150 2 Va 2 3/4 ,200
IY4 .200 2 V a 2% .250
% VA .200 2V a 3
,300
%
m .250 2 % 3
.250
7/s i% .300 2 3 /a 3 l/s .300
X
m .200 21/2 3 l/s .250
1
m .300 21/z 31/4 .300
1Vz m .250 21/2 33/8 .350
V/s m .300 31/4 41/s .350 1He VA .215 33/e 41/4 ,350
1Ya v /4 .200 31/2 41Va . .300
IYa 2
.300 31/2 41/2 .400
XHe XHe 4 5 0 3Hc 4Mc .350
lHo 2Ke .300 3>He 5He .500 1% X3/4 4 5 0 43/4 51/4 .600 1% V/s .200 1% 2 H .300
l%e 2He .300
1% 2 J/ l .300 1Vz 2 % ,350 V/2 2% .400 l% 2!/s .200 1% 2V t .250
DIMENSIONAL DATA (AN Design) Nominal Size
.STACK HEIGHT
MH
1/4
%
3/8 %
I/2 1
He lH e
% V/s
%m
%m
3/4 V/a
He 1Ya
Ho lHe
% 11/2
% l 5/s
1
1%
1
II/2
V/s 1%
lHe 1 %
1Va 1% 1He 2Hr.
lHo 2He
II/2 33/s
13/4 23/a
13/4 2% I 34 3 V/s 21/4 lHo 2He
CHefkliy ,083 .083 .083 .156 ,083
,140 ,083 .083 .083 .140
.140 .156 .083 .083 .083
,083 ,083 .156 ,197 .197
,140 ,197 .197 .083 ,156
H
2V
21/4
2% 23/s 2H
2He
2/ic
21/2 21/2 23/4 234 3 334 4
41/2
5
51/4
s ' SpS : i
2 % .083
3
.156
2% .083
31/s .156
2 He .197
31/s .156 23/8 ;.97 3 .083 31/4 .156 31/4 .083
334 ,197
4
.197
43/4 .197
47/s .197 51/2 ;i97
534 .156 6 14 .197
11
M ACHINING DATA FOR METAL ADAPTERS
Homogeneous, Fabric, C-V U , C-VH , Temperized 775-T and C-78V V-Rings (Recommended Material-- Bronze or Brass)
0.D.MIN.-.008
H OM OGEN EOUS AND FABRIC V-RINGS
J.D.MAX.+OOS"
45%
R RAD,
Z1
H
/
-- Jt---------- /
.010"
FEMALE ADAPTER
*--o.d.min.-.020X030"
z
k --LD.MAX. +.02<#b3tf
Pressures P.S.I.
Clearances female Adapter
1500-2000 .005 20003000 .004 3000-5000 ,003
NOTE;
Clearance* for female adapter* used v/ith homogeneous V* Rings at pressures over 1900 pel, should be decreased per small table above.
MALE ADAPTER
:<
m
mm
ttS pP
k 0
tSlft
k
.177 -125 ,166 .048 .06
Va .240 425 483 .080 ,06
% .302 ,125 .219 ,093 .09 % ,365 .125 .250 .120 .12 % .427 .125 ,281 .144 .14
%Va .490 .125 .307 .170 .16 .615 .125 .373 ,219 ,19
%Va .740 .125 .433 .269 .22' ,365 .125 ,500 ,318 ,25
1
,990 .125 .563 .364 .23
CHEM LON CV-U , CV-H , TEM PERIZED 775-T AND C-78V V -R JN G S
c-yu FEMALE AMD MALE ADAPTER
C-VH, 775T and 073V FEMALE AND
MALE ADAPTER , ^
z , vPacking;Space ; Reference
A7 .: B
;-. ; n C . ; MAX. '
Dv
90*
r X X /|C X X
A
^X X X /
! 1
- -- A -- *"
A K...
_i-- c
f i
---- A --
>.072*
%
.188 .123 .136 ,020
Va
.250 .145 ,163 .020
Hi
.312 r ,176 ,190 ; .020
%
.375 .202 .212 .025
%
.437 ,229 ,239 .025
Va
,500 .255 ,267 .025
%
,625 .307 .321 ,030
Va
.750 .360 ,371 .030
NOTES: ( 1 ) Fem ale adapter stem dia, is + .0 0 5 , box bore is --.005. Male adapter stem dia. is + .0 1 5 , box dia. is - . 0 1 5 .
(2) Female adapter tolerances arc + .0 0 2 J.D., + .0 0 3 0 .0 ,
-.0 0 3
-.0 0 2
M ale adapter tolerances are + . 0 0 5 LD ,, + ,0 0 0 O.D.
-.0 0 0
-.0 0 5
CRANE P A C K I N G C O M P A N Y
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: C ran e Packing C om pany, Ltd., Box 3248, S tation C, H am ilton, O nt. In Mexico: In d u s tria s J o h n C rane de M exico, S .A . Ponionfe 152 i679 indu strial V allejo, Mexico, D.F. In B ra zil: J o h n C rane In d u strie E C o m e rd o , Ltda. A vcnlda Jurubatufaa 600, S ao B ernardo do C am po, S .P . In A astral Ia : Jo h n C rane Mauri Pty., Ltd., 160 Eldrldge Road, Bankstown, New S o u th W ales, A ustralia In Europe: C ran e P acking Ltd., S lo u g h , B ucks, England In Japan: John Crano Japan, Inc., No. 5, Tenjlnbashl-suji B-choma, Oyodo-ku, O sa k a 531, J a p a n
O FFICES, W A REH O USES AND SERVICE THE W ORLD OVER
CUP ACKINGS
:
!
Homogeneous U-Cup Packings
i
V
r
STANDARD
"AN" DESIGN
John Crane Homogeneous U-Cup Packings are available in a full line 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 compietely automatic in action.
j
mm
cu`
Smaller cross section
S2/es space.
Increased Up body offers g reater resistance to high pressures, sensitivity to low pressures.
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.
fo r
!
John Crane Fabric U-Cups are a heavy-duty seal
INSTALLATION
i
designed primarily for slow moving rams and pis
.
tons such as found in hydraulic -presses, jacks and
The preferred installation, for a fabric
cylinders, Space saving and ease of installation
U-cup is with the use of a pedestal or
features m ake these unitary seals attractive to de
pedestal and back-up cushion ring.
signers, They are designed with heel clearance for minimum friction and positive lip interference,
The pedestal keeps the lips of the U-cup sway from tho bottom of the gland,
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 c le a ra n ce s betw een the metal parts are held to a minimum.
and it does not exert radial pressure on the Ups, This allows the molded-in lip interference to proyide the Initial seal and the pressure to actuate the lips.
Pedestals are made of one or more laminations of gasket material, Tho length or height of the pedestal can be
varied to fit the specific gland or stuffing
box.
POPULAR Sizes and DIMENSIONS
The back-up cushion ring acts as an
anti-extrusion ring and protects the
U-cup at higher pressures. It is usually
molded of the same material as the
U-cup, and since it does not function as a seal, the back-up ring may be used in split form.
Pedestal Ring and Back-Up Cushion Ring
The use of braided filler rings is a carry-over from leather U-cups, Leather does not have an elastomeric memory, and the braided flax filler rings were used to maintain lip contact at low pressures. Fabric U-cups have a moided-in lip interference and the elastomer binder provides the "'memory" to maintain lip contact at all pressures.
O
Piston Snap-On Installation--Fabric U-cups can be economically installed on one-piece pistons, Befow is a sketch of how this can be accomplished.
It is important that a sharp corner be machined where the bottom of the groove meets the shoulder. This is the secret in the success of this type of installation. For this reason it is recommended that a slight chamfer be cut in this corner, which tends to force the lip tightly into the corner assuring that it will be retained on the piston.
4
i
i
U.S.A.
J
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 80 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 500 FSf, HUVA-cups can be used in both air and hydraulic cylinders for pressures up to 1000 PSf, HUVA-cups will handle pressures up to 5000 PSI if back-up rings are used to bridge the clearance behind the packing and prevent extrusion. Generally, the back-up rings are cut from 1/16" thick gasket sheet material. 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 iips are obtained on both U-cups and HUVAcups by knife trimming, U-cup lips are cut straight (90s" to the axis) and HUVA-cup lips at a 20* angle. The angle trim on the HUVA-cup lips provides a better seal at low 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 2 nd 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 and pres sure actuated lips.
tijiiui\/njh ui-Mi jmr Oe Popular Sizes
f S il)
</* % '/*
54
*/i
11115111
V ie
%!
V
%*
Yi
y*
Yt
%
Va
'/*
2 y 2 y* 2% 2%
2Vu,
2V t 2 Va 2 Va 2V t 3
S S II
Vu, Vu Vu Vu &
kJ
i
G (Mai) 8 Mart ~ 2 W ~ C ( M m ) N(M ln) J = R ( M I o ) 'r 2 W - r C ( M a i )
P iU ln ) *
" CfMai)
A {mw*'L'M/32I;Jo8
M(Mar) **
AiMjfi)" L + 1/32Ilo!
--1Wi-nriA"H I111fJIIJ___ H(iUM llU lir
D IM EN SIO W S
A - G ro a t* Length
8 - C ytln d ar H are
C - Minimum
C learance
G - Plilan G ro o ve O lem eltr
C - Urtfllfl of H O V A Cup
M - H o d B e a rin g O itm e u i
tl G la n d D iam eter
P - P isto n D iam eter ft * H od D iam eter W N o m in al C ro a t-S e c tio n oi
H U V A Cup
RECOMMENDED MAXIMUM O IAM ETRA CLEARANCES
:' "
TYPE O f SEflVICS
UP TO 10 PS)
: OVER 1000 PSI
Ughi O u Vi M orilum D u ty Hairy Duty
,020 ,015 .010.
-V : .015
,010
.006
7
"A i
y#
'/ j
V*
y*
M*
/t
y
y*
Va
Va
' Vu
%
'/a
Va
1
y*
"A t
IM *
y*
7/a
j y*
y*
Via
vu
%
1
vu
y*
i
154
%
IM *
1 %
%
1 '/a
i%
Vt
154
i'/ i
%
1 !4
17k
54
1%
1M*
54
I '/
17*
%
1 Va
2
%
1%
2 '/
%
2
2%
*4
Note; Other sizes available. 3
2 Va
3Vu
%t
2 "A i
3 Va
Vu
3
3Vu
54
3 Ma
3 Va
54
3 '/a
3 Va
'A i
354
3 Va
Va
3 y*
A
Va
3%
A Va
Va
A
A /i
Va
A Va
AVa
Va
A Vu
5
Va
AVt
S
Va
A Va
S Va
Va
5
SV u
'/ a
5%
6
54
S fi
6 Va
Vu
& Vt
7
Vu
7%
3
Vu,
954
10
"M
U Va
12
V
13
14
y?
14
15
'/y
Cbemlon TFE U-Cup packings are available in a wide range of sizes, For sealing purpo se s, 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 packings conforming to Ihe drawing below are generally recommended for operating pressures up to 1500 PSI, On installations where operating pressures exceed 300 PSI, diametral clearances at the heel of the cup should be held to .004"-,006",
DESIGN and INSTALLATION for TFE -CUPS
The gland ring supporting the heel of the packing must be close fit to the rod, having a maximum radial clearance of .003", It is recommended that the rod surface finish be 16 RMS {max.). Internal threads should be offset so that no damage will be done to the U-cup lips upon Installation.
STANDARD SIZES and DIMENSIONS
s n
NK IgB
&W 4
V* 3A 'A Vu Vu
V
%
Va \ Vu
Vu
'A 1
Va ! VU
Vu
V l'/ i
Va
vu
Vu
Va VA
\Va
Vu
Vu
^4*-- !
V V A
Va
Vu
Vu
1
VA
Va
Vu Vu
VA 1%
Va
Vu
Vu
VA VA
Va
Vu
Vu
VA V A V* %, Vu
VA 2
Vu Va Vu
V A 2'A Vu Va Vu
The installations shown in the drawing above are recom
V A 2'A Vu % 'At VA 2V% Vu Va Vu
mended. One illustrates a typical outside packed installation
VA 2 'A Vu Va Vu
and the other an inside packed installation. The same general
design rules apply for both of these types; however, provision
2 \ IV Vu Va Vu
should be made for support of the cup at the base of the
2'A j 2V* Vu Va Vu 2 A 2% Vu Va Vu
groove to permit the lips to flex under varying pressure loads.
2 V 3
Vu Va Vu
kJ
The metal support ring or adapter used for this purpose should not exert axial pressure at the base of the groove, since this
V A 3'/* Vu Va Vu
would tend to retract the Jips of the cup away from the sealed
2 A 3 'A y .
Va ! Vu
surfaces. It is suggested that the metal support ring be con
2% 3 'A V* 'A i Vu
structed so that it will be properly centered,
3
3 % ! Vi 'A ! Vu
U-cup packings can also be adapted for spring loading.
5
CRANE PACKING COMPANY
6 40 0 OAKTON STREET, MORTON GROVE, ILLINOIS 600 53 (C hicago
In C a n a d a : C rane Packing C om pany, Ltd., Box 3248, Station C, Hamilton, Ont. In M e x ic o : Induatrias Jo h n C ran e do Mexico, S .A . Poniento 152 i'679 Industrial Vallejo, Mexico, D.F. In B ra z il: Jo h n C rane Industrie E C om ercio, Ltda. A venlda Ju ru b atu b a 600, Sao Bernardo do C am po, S .P . In A u s tra lia : John C rane Mauri P ty., Ltd., 166 Eldrldgo Road, Bankafown, Nev/ S outh W ales, A ustralia In E urope: Crane Packing Ltd., Slough, Bucks, England In J a p a n : J o h n C ra n e J a p a n , In c., No. 5, T o n jln b a sh l-su ji 0-ch o m e, Q yado-ku, O s a k a 531, J a p a n
Suburb)
O F F IC E S , W A R EH O U SES AND SERV ICE THE W O RLD OVER
Printed in U ,S A
ISTON CUP
/ ....
^Piston 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 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 PS I,
DESIGN and INSTALLATION
John Crane Piston Cup Packings incorporate an exclusive square cut heel design that eliminates binding in service and at the same time strengthens the hinge area at the heel. Special Up design provides proper Interference (when instated) to hold low pressures,
By designing the back-up plate with a shoulder of proper diameter and height, not only is the centering of the packing automatic, but a controlled squeeze is applied on the packing to prevent it from working loose under pressure.
Where shouldered piston rods are used, it Is recommended that an O-ring static seal be installed to prevent leakage along the rod. This elim inates the need for employing the more expensive tapered piston rod ends and piston assembly. When large diameter cups are used (4" 0,0. or over), several equally spaced bolts or screws are recommended in order to se cure the cup installation firmly in place.
To insure proper operation and long service life of piston cup packings, avoid any design in which the packing must pass over corners, holes, ports or over a step diameter arrangement. For best results cylinder bores should be finished to 16 RMS,
CLEARANCES
It is recommended that the back-up plate be made with close clearances and with square corners to prevent cup extrusion. Excessive clearance between it and the cytinder walls results in early cup failure, because of the extrusion of the hee) of the cup into the clearance gap. Clearances resulting from the bore diameter (cup size nominal) and B diameter shown ini the table on page 3 are recommended for normal operating pressures.
The inside follower plate should have clearance as indicated by diam eter A to prevent pinching of the lip against the cylinder bore,
A controlled squeeze or compression to the bottom of a piston cup is essential. Over-compression is the most common cause of premature fail ure of piston cups. When the bottom or base of the cup is compressed, the material moves outward radially. If more squeeze than required to seal is used, the cup material is forced into the bore of the cylinder causing high friction, excessive wear 2nd possible toe-in of the lips.
RIGHT
WRONG
An installation squeeze of .005" to .025" is all that is necessary to seal the bottom of the cup to the piston. This squeeze can be controlled with a metal shoulder on the piston. A metal spacer washer should be used if the piston or follower does not incorporate the shoulder.
2