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(conoco) Interoffice Communication RECEIVED APR 21 1977 To Messrs. John Elkins and Bill Henry, PVC Plant, Oklahoma City From Paul Pickard, CED, Ponca City Subject April 13, 1977 Sound Level Survey A Oklahoma CityyPVC Plant i/ The subject survey was completed in March, 1977, by W. G. Warren, Jr., and Paul Pickard. The dBA readings recorded during the survey along with 90 dBA contour lines are shown on the attached drawings (SLS-33-42-1-D and SLS-33-42-2-D). The results of this data indicate that there are three areas where noise abatement is needed. These are as follows: 1. The Loading Area On the West End of the Dryer Building (Ground Level and Upper Deck) 2. The Compressor and Boiler Rooms 3. The Steam Vent On the V-40 Reactors There are areas in the plant that exceed 90 dBA (i.e., beneath the V-40 reactors), but personnel exposure Is less than that allowed by OSHA. We strongly recommend that a dosimeter be placed on selected individuals to determine more accurately exposure times in various areas of the plant. This data is valuable in evaluating the noise abatement and allows documentation of personnel exposure for future needs ^ Recommendations for reducing the noise levels in the areas listed above and the order of priority are as follows: 1. Loading Area On West End of Dryer Building Noise levels in this area range from 93 to 103 dBA which, according to OSHA, allows from 5 hours 20 minutes to 1 hour 20 minutes exposure for an 8-hour shift. Present work patterns require personnel to be in this-area 6 hours and longer per day. This, we feel, should be the matter one priority in the plant and make the following recommendations: a. The air duct to the air transfer pumps is radiating a noise level of 104 dBA approximately one foot from the surface. This duct runs from one end of the building to the other and affects the noise level of the entire area. Sketch No. 1, attached, shows a system that will prevent the vibrations of the duct from transmitting to the building wall and lower the noise level to approximately 90 dBA. VEV-261011 T Joint Letter Page 2 April 13, 1977 j b. The air blowers on the second deck create a noise level of 95 to 100 dBA over the main portion of this platform (see Drawing SLS-33-42-1-D). These machines and ducts should be lagged using the system shown in Sketch No. 1. Exceptions to Sketch No. 1 are 2 inches of fiberglass should be used on the blower cases and the Muffl-Jac cover may be replaced with Muffl-Lag as shown on the attached brochure. After a and b above have been completed, another sound level survey should be conducted to determine what further steps are needed, if any, to bring this area down to an acceptable level of approximately 92 dBA. 2. The Compressor Room The installation of the snubber on the 200-hp XLE compressor has lowered the level in this area to below 90 dBA and reduced the vibration in the offices on the east end (see Charts 1 and 2 attached). The noise and vibration reduction in the offices was not. quite as much as predicted in the previous report. However, it should be noted that the predicted reduction was based on the XLE compressor alone. It is now apparent that the two unmuffled compressors were contributing more to the noise and vibration levels than expected. Installing snubbers on the two smaller compressors should eliminate this. This area has more employee exposure than in the past and even more is expected in the future. Reducing the noise level in this room would Improve voted communication greatly. We are unable to find any data sheets on these compressors In the CED files. If you can furnish us with the bore and stroke, RPM, CFM, Intake size, and number of cylinders, we will size a snubber for your approval. Boiler Room This room has an ambient level of 78 dBA, which preiodically rises to 97 dBA. The source of this noise is the control valve (PC-1) located overhead boiler No. 1. This valve and associated piping should be lagged with PF-705 fiberglass and covered with a Muffl-Jac (see attached brochure). 3. Steam Vent On the V-40 Reactors For short periods of time during steam venting, personnel on the upper level of thr reactors are exposed to levels as high as 96 dBA (see Drawing No. SLS-33-42-2-D). With the increased number of VEV-261012 f t Joint Letter Page 3 April 13, 1977 i residential units being erected near the plant, this vent may become the source of citizen complaints. To lower the noise level on the upper level and preclude any complaints, we recommend installing a steam blowdown muffler. The "shop" type shown on the attached data sheet has been used successfully in other Conoco facilities or you may prefer a commercial model (see attached brochures on Aeroacoustlc Corp. and Alwltco Blowoff Silencers). The wide range of noise levels personnel are exposed to in the V-40 complex make it very difficult to determine the amount of exposure experienced. The use of a dosimeter on V-40 personnel would accurately determine exposure for this area. The dosimeter is also very useful in evaluating your noise abatement program and documenting personnel exposure for future needs. As noted previously, we suggest a follow-up survey once the above listed recommendations are completed. Noise control very often requires a step-by-step approach to do an effective job, particularly in an area such as the loading area. The recommendations contained in this report are a step toward a quieter working environment. If you have any questions concerning this report, please feel free to call. P. L. Pickard Designer Technical Services ymc Att CC: C. H. Klunick, Houston L. N. Vernon, Houston JX'A. Kuhn, Houston R. T. Ferrell, OKC A. W. Simons, OKC R. A. Frohreich, OKC (BGL-FCH-File) * VEV-261013 oo 3 3in z S C7 n tA \/> % 0 -T lA 0 r r1 3 p o tn X a 8 c a m 2 a co O> < o Vi Z > ii 8 > H 5 z o *n > Z >r< N m a 0>. Pt -n *n A 0 7v) y P fi r& r* o (N -n i f 0A u T- 0 c * lA 0 X r *71 ? TO iP f* 6> c 0 S* 1r f5i! l n,/ r\ .n ,T> m < 2L c OKJ" SOUND PRESSURE LEVEL DEC1BLES - RE 0.0002 MICROBAR *'- -'* o z > a H * s n * - 0'S I! i! ft* 1^ %* Ok s* 'D .jw o ^ ir ^ M ^ o/vrf N i'D 'V T ^ O Chart 2- Orua. CiTV Wt- ZOOVA^- *L(U Comm. kJois^ v ta Z *S Fuooa sound pressure level dB RE 0.0002 microbar NOISE CRITERION CURVES VEV-261015 T CHART NO. *3 <5ry /Vs f977 LOCATION OF ANALYZER: QC fJ&yfO, AlO*. - Oau/tSSra**'* &/? O/Zift cf fa titJf- 7o ^tco 4- EXPOSURE (HRS/DAY) O.S.H.A. = 48 A/jS>/U7&Z COMMENTS: <r*2/f/ce s Ma/ ko*s//2n> 'pre& OrV6/2 //>/$* xf&ArfMG+sr k/oa*c 6* 7U>*> /s &***/ Mu </<5vO. VEV-261016 1 CHART NO. 4 OKLA- Pvc Mattet-f /977 * LOCATION OF ANALYZER. &COW&6. a*T & EXPOSURE (HRS/DAY) O.S.H.A. = 4 COMMENTS: /%l&uSQ. tf+jr> >*J f OtS*f *4* a/o- / /*/ VEV-261017 SOUND PRESSURE LEVEL- DECIBLES RE 0.0002 MICROBAR O&A* Cfry ftfc f*77 CHART NO. i> < r Ul ~ - .25 oc s] 1 "t5 r-; -3 -4 0 .8-- < \< | 1 f r f 1 .. >--f t N j /* ft4 % 1 4. tl*1 l*4 & i* : ii -w > > 4. <r.- ' % * % ! :'rir s !** H & > "A" SCA LE .jfv * ' i. % ' \ j r ! 71 <1 31 t i i y > <i i i i! \<V! * \ i1 [` 0\ t |i j i > f 1"4 ri ii u r . *9 s 1 250 \ 500 \ IK 1 2K 1 4K f OK..... - CENTER FREQUENCY OF OCTAVE BANOS IHil LOCATION OF ANALYZER: /A/ Ooo# Of /?a?& EXPOSURE IHRS/DAY) O.S.H.A. * / j/cOA /n AfoJvT** COMMENTS: 7Z//S jZ>cs * y~*Jo/ZK- fa*/* frtr ***# ft**/* VEV-2610iS CHART NO. Cm fay PVC /%a>jT /977 000 014 LOCATION OF ANALYZER:/fcoM A/Xt&r Cfi EXPOSURE (HRS/DAY) O.S.H.A. * 7 COMMENTS: /tJTAXC* C~40i f 40Z 4Wouiry Ae f/rrf> Mru far**# -4&/ VEV-261019 CHART NO. 7 AM/ZC^/ SVc /Za+'T 77 SOUND PRESSURE LEVEL- DECIBLES RE 0.0002 MiCROBAR LOCATION OF ANALYZER: AtrdX* &/Z EXPOSURE (HRS/DAY) O.S.H.A. = / //eu*Z A*'+-for&* COMMENTS: VEV-261020 ttoJitoM MU frfC//rpt-J4C) 4* Mf<s. 0>y ' tf/LT>6B$ /&or>, tt. S*UPPoef fTMp ?74PP/aJ<9, *?cerw$ <tsau<-0 *JnT T&ucM rot>v&erdoe&j<v4TrGspr>eb<rJa**& OUCf 5UOOU? /*<CH/er* / c>wfA/f/<r<r>aAji*J<f /*/ot/9re/4C /aJ+oLat'w rw 70*J op 4rQU4C aJ&7&5 : /. rue 4/p over pop rue r/z&Jerea /?#**/*$ eue/t/m pe rsat* rue r&x moss <r&/i/V<Fc.r'<>*s$ jfr k/uez /f eyvrep* 7W #&&&*/# 2* Tee 4 Over* 4/a Scopes* fW*vcr* /?> aa&0 C/f/J6 7Ut* *ys/"*/-* &*c*pr ts* 2'y or r/t>6L<$4** 4*jr> 7U* Afv//U-JA e*+v*/z, />f*ty Se /@6fXM*n> y Mvfi-tAe$. &T<tf a4?sJL 4 2mr/3hlf?......... dat : ? uajct /2L/.GT 4&S/a/x_______ CHKD. OY.&&.UI OATtt.4L-r.Zl77 _______ ------------------------------------------------------------------ <Z2zx...&________________ ! VEV-261021 ihut ho------------or____ JOtt MO--------------------------- OWENS CORNING fibergias Industrial Insulation 700 Series Commercial 0 9 Industrial DiM January '9,< A highly versatile group of Fibergias insulating boards designed to insulate ductwork and equipment operating at temperatures to 450F. uses The 700 Series boards have been designed primarily to insulate heating and air conditioning ducts, ovens, tanks, boilers, hot water generators and other hot equipment. Type 701--A lightweight resilient insulation, in board form, used on vessels having irregular surfaces where the exterior finish is supported by welded studs, pins or other mechanical attachments. Type 703--A semi-rigid board recommended for use on equipment, vessels and air conditioning ductwork. Type 705--A rigid board with very high strength characteristics for use on chillers, hot and cold equipment, heating and air conditioning ductwork where greater abuse resistance and goo<} appearance is required. benefits tower operating costs--tt>e exceptional thermal efficiency of Fibergias 70Q Series Insulations lowers operating costs. End-use tailored--three densities offer a selection of products to meet upclpc performance and economic requirements. * Lower maintenance coats--700 Series resists damage, maintains structural Integrity and efficiency. Thickness stays uniform. description Fibergias * 700 Series Industrial Insulations are made of inorganic glass fibers pre-formed into semi-rigid to rigid rectangular boards of varying densities. The series consists of Type 701. 703 and 705. Each type has specific thermal and physical characteristics which makes it suitable for the uses described. Type 703 and 705 are available with a factory-applied vapor-barrier facing to prevent condensation on cold surfaces and to provide a neat finished appearance Neat, finished appearance--the boardlike characteristics of the heavier density 703 and 70S products provide neat square corners. The factory-applied facing provides an attractive finished appearance. Immediate building code approval--Fibergias 700 Series Insulation has a UL flame spread rating of less than 25 'Trtdwnark HogU>prod Own* Coming ffborglw Corporation performance characteristics Sound absorption coefficient* (2" thick #6 mounting) Frequency (Hi) 125 250 500 1000 2000 4000 NRC (nauieilen Type 701 703 70S 34 .32 48 .70 .74 82 .90 .97 .97 .97 .99 .99 .86 .87 .90 .83 .85 .86 .17 .88 .92 Size and density Density (PCI) nicftness fin Vi" increments) Compreeetve Strength (pef at 10% deform.) Standard Ofie (Inches) Thermal cone. ($ 75F Mean Temo. 1After compression pKkigte. 701 1.88 r*-4" 703 Too Y'-7" 70S 6.00 l"-2" 4.5t 100 350 24" X 48" 0242 0.230 0 220 Thermal conductivity facings Types 703 and 705 are also available with the following factory-applied vapor barrier facings: FRK--foil-reinforced kraft (available UL rated if specified in order). NEOPRENE COATED--either clear nr black (UL rated). fire hazard classification Unfaced, faced, and coated flame spread 25 fuel contributed 50 smoke developed 50 (Compared to untreated Red Oak as 100.) caution The recommended Economic Thicknesses shown are chosen with respect to cost, thermal performance, and energy conservation. It is possible that heat may be generated from the resinous binder of insulations it ignited by external sources such as welding slag, cutting torches, etc. Care should be taken to avoid direct contact with the insulation by fire or ignition sources. Mean temperature, F Moisture absorption--lees than 2% by volume. Bacteria and fungus roilatanca does not breed nor promote. Odor--odorless. Humidity and temperature effect--cycling conditions will not cause spalling or crumbling. Corrosion--does not celerate corrosion of copper, steel, or afuminun^. application recommendations Type 701--lightweight unfaced flexible insulation in board form for use on vessels having irregular surfaces, where the compressive strength is not a performance criteria. Types 703 & 705--board insulations normally impaled on welded pins on flat surfaces. They are cut in segments and banded in place on irregular surfaces. Unfaced boards are normally finished with reinforced insulating cement or weatherproof mastic. Faced boards, with joints taped to provide a continuous vapor barrier, may be left unfinished or may be canvas jacketed. specification compliance HH-I-558B, Form A. Class 1. 703* * & 705. HH-I-558B, Form A, Class 2. 703** & 705. HH-I-558B, Form B, Type 1, Class 7. 701. Navy Bureau of Yards and Docks. 16YF. 703** & 705. Corps of Engrs. C.E.--301.08, .11 thru .17. 703** & 705. NFPA, 90A, 703 & 705. tyD# J03 fj In '.pi'i.ialty iwndur.i'd l.jr r.onfrar.ls where r.r-rhlir.aliiin '** f.orriplrarir.r. Ir, the above Federal Spaofication n required Available oia<n or laced lor use on hoi or cold equipment and for air conditioning ductwork VEV-261023 Wjrtfftifrr Hi iii ii i m iiti na i ~ i economic thickness Selection of an insulation for any specific application should take into consideration the following important criteria: 1. Cost ol insulation applied. 2. Cost of heat energy at midlife. 3. Cost of capital. 4. Capital investment in heat production equipment. 5. Temperature differential. 6. Sire of the pipe surface. 7. Conductivity of insulation. 8. Depreciation period--insulation and facility. The thicknesses shown in the tables below are based on the following typical conditions: \ twl Commercial (full lima); Annuai fuel price increase: 4% Initial heat cost: $2.75/1OO0 lb. steam Heat cost at midlife: $4.07/1000 lb. steam Cost of money: 7'/?%/year Capital Investment: $20/lb. steam/hour Flat insulation cost (1"): $3.40/sf Depreciation time: 20 years Hours of operation: 8760/year Commercial (part time): Annual fuel price increase: 4% Initial heat cost: $3.00/1000 lb steam Heat cost at midlife: $4.44/1000 (b. steam Cost of money: 7'A% /year Capital investment: $20/ib. steam/hour Flat insulation cost (1"): $3.40/sf Depreciation time: 20 years Hours of operation: 5400/year Economic thickness for healed equipment to 45V (80F ambient, still air, commercial full time) Surface Tame. ISO 200 300 400 450 Type 701 IT HL ST 2H 7 B5 3* 9 86 S 13 69 7 17 92 7* 20 93 Type 703 ET HL ST 2% 7 64 3% 9 86 S 13 89 9V, 16 91 7 16 92 Type 70S ET HL ST 2* 6 84 3* 8 66 5 12 86 6 16 91 7 17 91 Economic thickness for heated equipment to 450F (80F ambient, still air. commercial part time) Surface Tamp. 150 200 300 400 450 Type 701 ET HL ST 2 9 66 3 11 87 4% 16 91 5'* 21 95 6 24 97 Type 703 ET HL ST 2 8 86 3 10 67 4 16 90 5 20 94 6 21 94 Type 705 ET HL ST 2 8 85 3 10 86 4 15 90 5 19 93 5tt 21 94 rr economic tWclwiM mint Wt m hpet >w, BHiftw/HnmM tod BTsMirfoce tamperMure, f Thickness to prevent condensation on cold ducts and equipment The following chart indicates the recommended thickness for installation on cold air ducts at various temperature differences (duct to air). Also shown are values for heat gain and approximate maximum relative humidity allowable. Temperature Difference* 20 25 30 35 40 45 50 Recommended Thtchnea* gpchea) 1 1 1 1 1H 1H 2 Heat Gain ttu/trtw 43 52 6.1 7.1 57 63 5.4 PermlaaEHe Relative Humidity 90% 87% 89% 88% 90% 89% 90% Offices of Owens-Cornlng Flberglas Corporation Akron. Ohio Albany, Georgia Albany, New York Albuquerque, N.M. Anchorage, Alaska Atlanta, Georgia Baltimore, Md. Berlin, New Jersey Bethlehem, Pa. BiFfings, Montana Binghamton, New York Birmingham, Alabama Boise. Idaho Boston, Massachusetts Buffalo, New York Charleston, W. Va. Charlotte, N.C. Cherry Hill, New Jersey Chicago, Illinois Cincrnnall, Ohio Cleveland, Ohio Columbia, S. C. Columbus, Ohio Pallas, Texas Denver. Colorado Oes Moines, Iowa Detroit, Michigan East Hartford, Conn. Elkhart, Indiana Evansville. Indiana Flint, Michigan Fort Wayne, Indiana Fresno, California Grand Rapids, Michigan Greensboro, N. C. Greenville, S. C. Harrisburg, Pa. Honolulu. Hawaii Houston, Texas 216--867-5770 912-439-7091 518-869-0221 506-294-5511 907-272-6425 404-355-6821 301-727-0234 609-767-3300 216-865-0427 406--252-8496 607-754-4732 205--671 -7369 208-342-9311 617-235-7540 7T6--832-1410 304-744-2291 704-372-7065 609-428-3590 312-583-0100 513-281-1173 216-884-9440 803--252*9983 614--451-8420 214-233-9241 303-757-6121 515-874-4748 313--547-8000 203-289-6411 219-294-3627 812-425-5124 313-787-6573 219-483-9552 209-266-4193 616--452-6788 919-273-0528 803-271-9331 717--761-0430 808-537-3832 713-869-9363 Indianapolis, Indiana 317-898-1140 Jacksonville, Florida 904--786-5880 Kansas City, Missouri Knoxville, Tennessee Lansing, Michigan Utile Rock, Arkansas Los Angeles, California Louisville. Kentucky Memphis, Tennessee Miami. Florida Milwaukee, Wisconsin Minneapolis. Minnesota Mobile, Alabama Monroe. Louisiana 816--753-7725 615-584-6161 5f7--372-4030 501-664-2133 213-724-5383 502-456-4230 901-362-2010 306-651-2113 414-344-3811 612-884-5375 205--471-5465 318-325-7202 Nashville, Tennessee Newark, New Jersey New Orleans, Louisiana New York, New York Norfolk, Virginia 615-298-3646 201-484-8800 504-837-2902 212-759-3810 804-855-0114 Oklahoma City. Okla. Omaha, Nebraska Orlando, Florida 405-528-4468 402-397-2072 305-424-6371 Philadelphia, Pa. Phoenix, Arizona Pittsburgh, Pa. Porlland, Oregon Providence, R. I. 215-688-8650 602-277-6217 412-563-7766 503--620-1014 401-434-7437 Raleigh, N. C. Richmond, Virginia Rochester, New York Rock Island, Illinois 919-833-7716 804--272-5851 716-381-0340 309-788-6309 Sacramento. California SI. Louis, Missouri Salt Lake City, Utah San Antonio, Texas San Bernardino. Catif. San Diego, California 916-927-1896 314-991-2640 001-487-6204 512--342-9531 714--885-3496 714--292-7722 San Francisco, Calif. Santa Clara, California Scarsdale. New York Seattle. Washington Shreveport. Louisiana Spokane, Washington Springfield, Illinois Syracuse. New York 415--873 7950 408--247 -1050 914--472 3400 206--762 4250 318--222 7100 509-924- 6532 217-787- 2530 315-455- 5601 Tampa. Florida Toledo, Ohio Tulsa, Oklahoma 813--877-7516 419-259-3030 9f8--627-1220 Washington. D C. (Gov't.) 202-296-3296 Washington. D.C. (Sales) 301--434-6100 Wichita. Kansas 316-265-2522 Windsor. Conn. 203-524-5967 INTERNATIONAL GENERAL OFFICE. Toledo, Ohio 419-259-3492 EXPORT SALES OFFICES: Isla Verde. Puerto Rico 609--791 -2402 Miami. Florida 305--377-0974 New York. New York 212-759-3810 Toledo, Ohio 419--259-3023 EUROPEAN SALES OFFICES: Brussels, Belgium 02/72.23.26 Milan, llaly 2/6887-851 Paris, Survilliers, France 1/471-9210 Wiesbaden, Germany 06121/562031-34 . OWENS 'CORNING FlBERGlAS OWENS-CORNlNG FIBERGLAS CORPORATION Mechanical Products Div<s>on Flberglas Tower, Toledo. Ohio 43659 Pub. No. 1-IN-6MO Utho In U.S.A. January 1974 VEV-261025 eSSSS&sie&c-. Sfits METAL JACKETING SYSTEMS TECHNICAL PRODUCT INFORMATION MUFFL-JAC ACOUSTICAL JACKETING DESCRIPTION Childers Muffl-Jac* is a special composite jacketing of high quality lead laminated to Alu minum for the reduction of noise levels and protection of thermal insulation materials. It is designed to reduce the radiation of sound gen erated by or within piping end equipment. Standard Childers Muffl-Jac is supplied with an outer layer of Type 3003 or 5005 high purity Aluminum, exhibiting exceptional resistance to most weathering and corrosive environments, and an Inner layer of lead. It is manufactured In rolls, sheets, or is pre-fabricated. A special ft*" corrugation is incorporated into standard Muffl-Jac; corrugated jacketing adds stiffness (for attenuation of the lower frequen cies) and strength, reduces glare from external light sources, allows for expansion of the jack eting. eliminates "coil break" over small size piping, and does not show dents as readily. For special uses, Muffl-Jac* Is available in a variety of metals and finishes. ADVANTAGES Muffl-Jac$ is applied in one operation, unlike comparable products, thereby reducing appli cation costs. The acoustical effectiveness of Muffl-Jac is superior to the separate applica tions of lead and Aluminum, due to the special bonding properties of the adhesive. Muffl-Jac has high transmission loss characteristics, and also serves to protect underlying sub-structures and/or thefmQj insulations against mechanical abuse, weather, and corrosive environments. Childers Products Company provides technical assistance (nine choice, selection, and applica tions of complete acoustical Insulation systems for industry. If stu0M are required to deter mine the solution of a noise reduction problem, Childers Is assisted by recognized Industrial acoustical engiiyering consultants. Childers Mulit-Jac* has been tested by an in dependent acoustical laboratory in accordance with ASTM designation E 90-70, standard clas sification for determination of sound transmis sion class. Muffl-Jac has an STC-26 rating.The sound transmission loss graph for Muffl-Jac is printed on the reverse side for reference. USES Childers Muffl-Jac is used over mineral fiber or glass fiber insulations. It is applied over straight runs of piping, HVAC Ducting, casings, enclosures, gearboxes, and other regular sur faces. For Irregular surfaces, such as com pressors, pumps, blowers, fittings, flanges, and valves, Childers offers an equally effective noise reduction mastic material. MUFFL-LAG, a trowelable transmission loss compound. APPLICATION Childers Muffl-Jac is applied in a similar man ner as standard insulation metal jacketing. It is applied over the insulated surface, making sure a two inch overlap exists for each radial and longitudinal lap of jacketing. For vertical appli cations, mechanical supports should be applied to hold the insulation and Muffl-Jac in place and support the load. Muffl-Jac is then se cured with conventional fastening devices such as strapping and wing seals or other mechani cal means of attachment. For maximum acoustical effectiveness, a sepa ration should exist between the radiating sur face and the Muffl-Jac. This separation is filled with previously applied glass fiber or mineral fiber insulation of 1 to 2 inch thickness and 4 to 8 lbs./ cu. ft. density. Like alt transmis sion loss materials, Muffl-Jac must be sealed at all joints, laps, cutouts, and gaps with either Childers Chil-Joint (CP-70) or Chil-Byl (CP-76) joint sealants. For large irregular cutouts, gaps, and all irregular surfaces, MUFFL-LAG is used to provide an essentially air-tight monolithic treatment. When sealed, the Muffl-Jac appli cation is considered complete, and effective noise control is achieved. t f r Copyright 1976 Childers Products Co. P.O.Box 22228 (23350 Mercantile Rd.) Beachwood, Ohio 44122 (216) 464-8020 Telex 98-5497 OTHrfl PLANTS AT: 8'4H '> ISOS' <2151 943 7600 Talaa 84 340S HauWwi, Tun 77122 <7131 SSI-3661 Tala* 77-6184 lot Anftias. Calif. M022 (2131 7266306 Talaa 67-3639 Windw. 0"lans. Canada (SIS) 944 6800 Talaa 24-77647 Carteot. Vtna/uala 61.79 11 Talaa 21245 Ca'iait. Altetii. Canada (403) 276 6638 Talaa 038 24 793 MJE-874 Supersedes CRL-AL-866 VEV-261026 f 4 Test Report of Cedar Knolls Acoustical Laboratories o i The following Octave Band Analysis shows the procedures for arriving at the noise reduction capability of typical Muffl-Jac applications GAS PIPE Hi *Ldo|UIdSBlln*"lto A-w*.gh.g (flB> Weighted Level* JB) MReUmFnfLa-nJtAwCei*gfhdteBdi (leTveill* (OS) 125 250 500 HO -15 95 S 7 >904S2 -17 77 106 3 <03 20 03 IK 97 970 2716 2K 90i 91 32 $9 CHEMICAL PIPS ID (OB) Ahe* legging -- weighted <even ftOOP PIPE LD fdfil Allar lagging -- weighted lever* 111 106 99 95 92 ss 0* 76 71 61 9752 9794 i03 so 106 00 10712 l>sde ref 20a Pa Pa Pascal-nm< 4K 051 06 38 48 9643 92 63 T11o3ta4l 8 (l.n) <05 dBA OOdBA 113 JB flint 69 dBA 109 08 flm 64 OBA .016x36"x36' Aluminum Muffl-Jac $1.40 per sq. ft. Available in Rolls & Prefabricated -- Weight 1% lbs. per sq. ft. Prices Apply to Quantity Shipped to One Destination at One Time PRICES SUBJECT TO CHANGE WITHOUT PRIOR NOTICE. ORDfftS SUBJECT TO PRICES IN EFFECT AT TIME OF SHIPMENT. F.O.B. SHIPPING POINT TERMS: NET 30 DAYS. 1 % PER MONTH SERVICE CHARGE ADOED TO PAST DUE BALANCE r VEV-261027 Effective Noise Control with Lagging that's simple to apply, and Guaranteed to do the job! by childers products company --iii rnmn iiVUlFf t-l./UI acoustical coating reduces ...a revolutionary material for sound attenuation developed by established acoustical engineering consultants Years of specialization in industrial noise control preceded the introduction of MUFFL-LAG The formulation for MUFFL-LAG was developed specifically to overcome the shortcomings of existing products used for noise control in piping, tanks, machinery, and other industrial installations. Now Childers offers not only a practical method of controlling noise, but also reliable technical guidance before and after attenuation. If your noise problem has not been fully identified, send for our information form, which is easy to complete. After examining your situation, at no cost, Childers will advise you the best route to take. Jn some cases, a free evaluation in your plant may provide the solution. When more information is required to determine the proper solution (cost of effec tiveness, influence on production, etc.) a detailed study will be made, leading to a specification from Childers which will be backed by the Childers Guarantee Studies will be made by recognized Engineering industrial noise consultants Years of accomplishment in noise control for architects, engineers, industry, and government have distinguished these firms in this field. Recommendations are made on the basis of your specific needs, regardless of the products marketed by Childers. Lead by itself and other metals traditionally used for noise reduction oftentimes have many shortcomings. Developed with the advice and counsel of established experts in the acoustical engineering field, MUFFL-LAG overcomes virtually all of the drawbacks of these other materials. It has exceptionally high trans mission loss characteristics. MUFFL-LAG is monolithic in treatment, and has resistance to impact and contamination. (TOP) ji-.iouse lab analysis at Oonley, Miller & Nowikas, Consulting Acoustical Engineers associated with Childers Products Company for the development of new noise con trol products. (BOT) Remote instrumentation console measures trans mission loss effectiveness of MUFFL-LAG at Cedar Knolls Acoustical Laboratories. For testing sound transmission and absorption and other characteristics, their facilities are among the most extensive in the world. This polymerbased acoustical coating combines substantial reductions in installation costs with highly effective noise control. If you have already measured accurately the extent of your noise problem and MUFFL-LAG is the logical solution, we welcome your order. VEV-261029 istallation costs as much as it reduces noise Economical Installation -- MUFFL-LAG can be applied easily with a trowel in its liquid form. It adheres readily to most materials. No special skills are required. An air-tight seal can be formed readily, even around elbows, valves, and other fittings. Its thixotropic characteristics permit application to vertical surfaces. MUFFL-LAG cures to a non-volatile, touch-dry condition fn less than one hour. The coating is normally applied over glass fiber or mineral wool. A coating of .140" thick will yield surface density of 1.5 tb./sq. ft. Highly Efficient Noise Control -- Independently certified test results show transmission loss for frequencies between 100 Hz and 5000 Hz. MUFFL-LAG has a rating of STC 20 (sound transmission class). This material has high mass and cures to a firm condition with no voids. The following Octave Band Analysis shows the procedure for arriving at the noise reduction capability of a typical Mufft-Lag application. 6RASWP 63hi (461 1Lo * 4 46kdfuHmanMot **iglwig ( ) n 46IM ( ) 1 0(461Muffi * |T l) 72Kr.u<l*wt tuyiWd i - WEMICALPli*# 1461IP 4>0Ml*. >*M -- *4mflm l*l| fLloO(U46P1PlPE AN*. ItQpMg -- 1 108 9* IP d6'K.n 1110 --19IS0S as 213002 91-44a BO s1118o00-.763o81 9I9K7f7t 69 29*0 91T 54 in 108 99 9$ 92 79 67 57 as H '03 08 102 83 78 88 N H' Sum rf 0p**i'" s 4K 85 MJdBItov 881 OSdBA 4 894BA 93 11346 (Hnl 50 68 4BA 92 sa 109 46 85 4BA Itm\ 1 | Requires no Maintenance -- MUFFL-LAG* Is supplied in aluminum gray color and does not require painting. Areas damaged by mechanical abuse are easily repaired. Mechanical Protection -- When cured, MUFFL-LAG remains flexible, and forms a tough protective coating. If damaged accidentally, this polymer based material can be spot repaired to form an air tight seal simply by patching the break with MUFFL-LAG. In addition to its exceptional acoustical properties, MUFFL-LAG is an excellent weather proofing coating for thermal insulation, being easy to apply and quick setting. Impervious to Chemicals -- MUFFL-LAG Is inert in its cured state and is non corrosive and impervious to almost all acids, alkalis, and oils (see Chemical Corrosion Resistance Chart). Air tight. Waterproof Seal -- MUFFL-LAG contains no voids when cured and is waterproof and air-tight. Chil-Glas *5 is recommended as a reinforcing membrane. High Melt Point -- Unlike some types of lagging, which can melt at temperatures as low as 180 F., MUFFL-LAG with stands temperatures in excess of 350* F. Contains No Lead -- MUFFL-LAG meets the chemical ingredient requirements of the Food and Drug Administration. It can be used in conjunction with other Childers Products coatings to meet U.S.D.A. Standards. Consistency -- MUFFL-LAG is available in two gallon cans, complete with 1 small bottlp of mixing material which is mixed simply prior to application, it comes in the consistency of plaster and is applied with a trowel. Normal curing time is 1 hour to touch dry. In the unmixed condition, shelf life is at least Transmission Loss Test - ASTM E90-70 -- The special test facilities available at Cedar Knolls Acous tical Laboratories enable them to con duct this test exactly in accordance with the standard of the American Society for Testing of Materials and their independent report shows the results achieved and the STC 28 for which the material qualified. SUPERIOR DAMPING CHARACTERISTICS Though flexible m character, the energy losses in flexure are high so that MUFFL-LAG can be applied to any resonant surface to provide superior damping characteristics. Sound Transmission Class (STC) Average Weighting Test Report of Cedar Knolls Acoustical Laboratories j Frequency in Hz j (Tested in accordance with ASTM E90-70) i i j Physical Properties of M^FFL-LAG* Chemical Corrosion Resistance Trot|| applied Tranamlaalon Low Coating Coverage @ 1.5 Ib./sq. |t. Approx. 11 sq. ft./gat. Rams Relardancy; UL-94, SC-0 Vertical teat (H ') Consistency: Like thick piaster Weight: Appratc 17 IbsVgal. Stability (uncured) Minimum ft months {test in prog) Hardness: qjrcol hardness 30-35 Clean-up: Chlorinated Solvents (N-F) Water Absorption: 0.4% by weight {Soaked in Boiling Water) Service Temp.: -lOTto 350*F Application Temp.: 20*F to 100*F % So(0a by Vol.: STC 2ft (Cedar Knolls Acoustical Lab) Weight Chang# (%) Solution 14 90 355 Days Days Days Appearance Cone. Ammonium Hydroxide None -- 1.1% Very Slightly Darker 10% Ammonium Hydroxide None 3% 0.5% Very Stightty Darker 10% Sulphuric Acid None None 0.2% Very Slightly Darker Concentrated Nitric Add None -- 1.6% Slightly Yellow 10% Nitric Add None 0.2% 0.6% None Concentrated Hydrochloric Acid None -- 0.7% Slightly Darker 10% Hydrochloric Acid None 0.1% 1.1% None 25% Aqueous Cstcfum Chloride None 0.4% 0.4% Very SKghtty Oarker Distilled Water None 0.5% 0.?% None Brake Fluid Gasoline None 0.5% 0.6% None None 0.1% 0.4% efvi-o-n--o Toluene Methyl Alcohol 0.1% 0.3% 1.1% Stightty Darker 0.5% 0.2% 0.5% rii-o--n-f Motor OH 0.4% 0.7% 0.7% Very Slightly Darker MUFR.-LAO It ftglKtrtJ ndwwli VEV-261031 BKiLilMfe. On vessels & pipes MUFFL-LAG Is applied easily with a trowel and adheres well to most materials. It is self-supporting in its cured state. An air-tight seal can be formed readily around elbows, valves, fit tings, or other irregular surfaces. On enclosures An effective noise attenuating enclosure Is achieved simply and quickly by forming a structure of glass fiber board 4-6 lb. /cu. ft. and coating it with MUFFL-LAG. TYPICAL APPLICATIONS Power Houses, Steel Mills Casings of blowers, generators, compressors Inlet and exhaust pipes Steam pipes Fan casings Pump casings Of enclosures Petro-Chemjcal Refineries Pipes Blowers, generators, compressors Gearbox enclosure^ Pump casings of enclosures Heavy Fabrication' Gearbox enclosures Crane drive enclosures Partial enclosures for presses, saws Compressor casings Hydraulic pump enclosures Fan casings Cyclone air extractor casings Food Industries Conveyor chutes pipes Cyclone casings Compressor casings Gearbox casings Pump enclosures Mill casings Architectural H.V.A.C. ducting Pumps, blowers, fan casings General Manufacturing Small enclosures for gearbox Enclosures for hydraulic pumps Steam pipes H.V.A.C. ducting Compressor houses, generators Equipment test rigs Exhaust pipe and muffler casings Casings of Vibratory Screws Plastics Industries Pelletisers Grinders Conveyor pipes childers products compan1 World's Largest Manufacturer of Meta! Jacketing, Costings, Adhesives, and Sea/ants P.O.Box 22228 (23350 Mercantile Rd.) Beachwood, Ohio 44122 OTHER PI ANTS AT IrnMl. r, imo; Homfm. Tm 77072 (SIS) 943 7600 (7131 691 3661 Ttlcit 94 3400 T*l* 77 S164 liK*nrlvCi<l 90027 f7131 7286306 Trlr. 67 3639 Windsor. 0nt*r.ri C>nad> (619) 944 6800 T<M 74 7764 7 61 79 IT T.U 21745 (216) 464-8020 CjI?**,. Albtrtj Cantrfi 1403) 276 6638 THe* 038 24793 Copyright 1976 Childers Products Co. vev- '61033 COATINGS / ADHESIVES / SEALANTS MUFFL-LAG HIGHLY EFFICIENT TRANSMISSION LOSS COATING FOR EFFECTIVE NOISE CONTROL DESCRIPTION MUFFL-LAG is a tough, durable, and flexible polymer based acoustical coaNng for use In conjunction with 4 to 6 lb. density fibrous glass and other insulations; It may be used over any surface needing sound attenuation. It has a Sound Transmis sion Class rating of STC-28. MUFFL-LAG is waterproof, forms an air-tight seal, and is thixotropic. USES MUFFL-LAG is a superior noise control coating which was developed for use over any surface, such as piping, enclo sures, HVAC Ducting, compressors, pumps, fittings, flanges, valves, and other large surfaces. II has found many applica tions in the Petro-Chemical, Power, Plastics, Gas, and Heavy Fabrication Industries. MUFFL-LAG is also used to seal gaps, cutouts, and overlaps when MUFFL-JAC (a composite metal jacketing of aluminum and lead) has previously been applied to regular surfaces. MUFFL-LAG is gray in color, harmonizing with process equip ment and metal jscksting. It Is also available In other colors upon request. ADVANTAGES MUFFL-LAG combines substantial reduction in installation costs with highly effective noise control. It has a rating of STC28 (Sound Transmission Class). MUFFL-LAG is easy to apply by trowel or palm, has high mass, sets up quickly, cures to a limp condition, and contains no lead, it may be used in Food Processing facilities. MUFFL-LAG requires no maintenance; areas damaged by impact are easily repaired by coating the break with MUFFL-LAG. When catalytically cured. MUFFLLAG remains permanently flexible to permit limited expansion and contraction. MUFFL-LAG has a high melt point; it will stand temperatures up to 350*F with no effect upon the coating. It is impervious to most chemicals, acids, alkalis, oils, and Is non-corrosive. APPLICATION MUFFL-LAG ja applied by trowel or palm firmly on to 4-6 lb. density fibrous gists Ineutation. Other fibrous types of insula tion mqy be used,.however higher densities may be required. The insulation is first secured in piece and a tack coat of MUFFL-LAG is applied at a coverage rate of 20 sq. ft./gal into which Chii-Glas IS reinforcing membrane is embedded. Then a finish coat of MUFFL-LAG is applied to achieve a .140" dry film thickness, or a total coverage rate of 10-11 sq. ft./gal. approx. Embedding the Chil-Glas within the MUFFL-LAG affords maximum strength end dimensional stability to the cured film and should be applied. Joints or patches should have at lesst a 2" thick overlap of Chil-Glas. The thixotropic consistency of MUFFL-LAG also permits vertical and overhead applications without sagging. It easily bridges gaps and imperfections. COLOR Gray (Other colors available upon request) NET WEIGHT 17 Ibs./gal. approx. AVERAGE NON-VOLATILE 95% by volume SERVICE TEMPERATURE RANGE (Temperature to which dry coating is subjected) -lOf to 350#F APPLICATION TEMPERATURE (including wind chill factor) 20*F to 100-F CURING TIME To touch -- 30 minutes (Curing time will vary depending upon temperature, humidity, and amount of hardener used.) COVERAGE 11 sq. ft. per gallon CLEAN-UP Methylene Chloride FLAME RETARDENCY UL-94, SE-0 Vertical Test {1/8") List Price $40.00/Gal. (Supplied in IVi gal. containers) oCopyright 1976 Childers Products Co. P.O.Box 22228 (23350 Mercantile Rd.) Beachwood, Ohio 44122 (216) 464 8020 Telex 98-5497 OTHER PIAMTS AT: BtrsM.f*. laasr (2ISI 943 *600 Tele* 64 34W MfluMM, Teia 77672 <7|J|69(366f Tele* 775164 let Aretes. Wit. SWH (?MI 77*6306 Tele* 67 3639 Wintftnr. 0*W<e.C*ntfi (5191 944 6*00 THea 74 77647 Ceui. Vxerue< 61/9 11 Telea ?I?4S Cf*f!Y, Albetti. Cmtrii 14031 ? 76 6636 Tele. 030 24 7W MLE-176 Supersedes MLE-1174 Test Report of Cedar Knoils Acoustical Laboratories HANDLING, MIXING & APPLICATION INSTRUCTIONS STORAGE 1. Keep the materials stored In a cool location (approxi mately SO to 80 degrees F) prior to application. 2. Avoid prolonged storage at elevated temperatures. CAUTION: High temperatures will shorten the shelf life of this product. MATERIALS | MIXING EQUIPMENT 1. \Yi gallons of Muffl-lag In 2 gallon container 2. 1 -2 oz. squeeze bottle of thickener 3. 1 -2 oz. squegze {route of hardener 4. A long, thin, flat. non-spt(ntering wooden or metal mixing device (paint type mixer), approximately 12 inches long. MIXING INSTRUCTIONS To mix the total contents (percentages also apply) 1. Add a sufficient Aortton of the thickener squeeze bottle for desired viscosityTo the contents of the bucket and bland in. Mix thoroughly for 1-2 minutes. 2. Add the contents of the hardener squeeze bottle lo the mixed MuffMag and thickener and blend In. When ambient temperatures are above 90*F add only one half the contents of the hardener squeeze bottle to extend the pot life. Mix thoroughly for 1-2 minutes. NOTE: Unnecessary mixing beyond two mintues only reduces the time available for application prior to cure. 3. Be certain to wipe cling on side walls and base of con(piner into mixture. APPLICATION INSTRUCTIONS The contents of the container in which the Muffl-lag Is shipped will cover approximately 16 square feet at the rec ommended dry film thickness of 0.14 inches. 1. Transfer mixed material to the surface to be treated. 2. Spread a thin coat over the surface. Using a (rowel or other application tool, apply pressure to the coating when sprosding lo assure contact and Impregnation of the glass or othar type Insulation being coated. 3. Embed Chil-glas as into coating. 4. Apply flood coat of Muffl-lag to desired wet film thickness. NOTE: To. help determine proper wet film thickness, small swatches of desired dry film thickness can be at tached to insulation using catalyzed Muffl-lag as the adhe sive. and used as a gauge. The following Oclave Band Analysis shows the procedure for arriving al the noise reduction capability of a typical Muffl-Lag application. <jA$ PiPCXr Oil"**' HZ Ip (4Q) MtooMefl ir*8l Mg* l*Q '481 IT l) 63 2S ?S0 500 IK i* 06 19 in, '06 97 90 <5 3 9 1 81 >9 '03 97 91 f i* 29 in >*i fQ8) CHEMICAL MPE lc ictBi *H* I99"'IJ -- FLOUB PIPE lo inBl An** 'AW-q - mmehM* I***'* iB ab-h^ ?s 89 a S' Of 1 M > 95 ?2 ?S M 90 7% 49 41 44 99 '03 '06 '02 6? 6* '8 76 n 6' p* p .4.4 >/' Su- 4P 86 1'?90 " - 66 '06 -Pi O )' M 79` 9' i*3 -8 66 *:B* 92 mo rye i< -h 44 87 -B VEV-26 Murneiz fo& steam /*>iowor,i\ v/ SIZING TABLE> Steam Cap. lb/hr* 4,000 10,000 15,000 25,000 40,000 50,000 80,000 100,000 150,000 200,000 L Ft. 2 2 1/2 3 3 3 a 4 4 6 8 Dl In. 1 1/2 2 3 3 4 4 6 6 8 10 d2 In. 4 6 8 10 12 14 18 20 24 30 Number of 1/4" Dia. Holes for Press. 20 PSIG 40 PSIG 75 PSIG 150 PSIG 36 24 20 20 90 58 40 36 133 87 55 40 221 145 91 51 353 232 145 82 442 290 182 102 706 464 291 164 884 580 364 204 1326 870 546 306 1768 1160 728 408 For air, use next size smaller muffler. This muffler has been made as small as 2" o.d. 12" long with 3/4" x 8" inner pipe, 36 - 3/16" holes for 225 PSI steam with fine results. Muffler may be installed vert, or horiz. - preferably vertical to irect pressure waves upward. VEV-261036 Low in cost, compact, lightweight and easy to handle, SM Type Mufflers effectively silence the annoying and objectionable noise created by steam exhaust outlets. Unlike other mufflers for steam exhaust service, they are constructed with expansion chambers com pletely free of obstructions, in which the exhaust steam is expanded, then disseminated at reduced velocity through the perforated cylinder wall openings of the muffler-without noise, and with negligible mechanical impedance. As an additional safeguard for meeting the require ments of unusually demanding applications, SM Muf flers are supplied with heavy duty metal cylinder wail disseminators for successfully combating the other wise potentially damaging effects of high flow rate and temperatures up to 1000* Fahrenheit. Constructed of corrosion resistant materials and treated with a special coating for resistance to con ditions where alkalis could be a problem. For quick, direct connection to steam exhaust ports, SM Mufflers are supplied with standard pipe thread connections in a full range of sizes from 1 to 6 inches. SM TYPE SPECIFICATIONS Model si* ax SIS SM SM S40 SM A B C 0 e F Wfht./lb. t Exheuet Surface Aree/lff* i i*a 1VS 2 3 3* s* 5* 6* 1*4 13*4 18'4 23* 7U 7*4 12 17 15* %1 M4 1*4 2* 8<4 1 1 4 S 11 S1.S 39.9 79.5 119.3 294.4 (All dimensions in inches) 4 7* 23* 21'4 2*4 9* 14 344.0 8 10* 3034 27* 3* 13* 25 635.4 10 STEAM TEMPERATURE *F (SATURATES) Patented VEV-261037 allied uiitan fcbmpaHi) Presented By: forjP0* S' A-i-V~ BULLETWB 32 R2 . BLOWOFF SILENCERS `r*M^ muMl i /' Wi * W* 1 THE AEROACOUSTIC i P.0. BOX IS AWTYV1LLC NEW YORK lOfl bi^ VEv'"26103? BLOWOFF SILENCERS Whenever a gas u-'der high pressure discharges into the atmosphere or to a lower pressure in a pipeline, a large amount of objectionable noise is generated. A large steam boiler blowing off excess steam at 2600 p.s.i. through a power relief valve will generate noise levels of t40 db. at 50'. Noise levels of this magnitude will permanently damage the hearing of people in the vicinity of the discharge and will provoke neighborhood complaints from as far away as two miles. A type RBS (see Fig. 1) blowoff silencer will bring these levels down to a safe, under 90 dbA level at 50` and eliminate neighborhood complaints. A small 1/4" air line, discharging 100 p.s.i. air from a pneumatic cylinder, will generate 100 db. 5' from the discharge. This is above the present OSHA 90 dbA limit for continual exposure, ft is an annoying and distracting noise that can easily and cheaply be eliminated by using a small type SBL (see Fig. 2) blowoff silencer. The noise of these discharges is generated by the turbulent reaction of the jet with the surrounding atmosphere plus the noise generated by the shock waves associated with supersonic flow, The Aeroacoustic blowoff silencers quiet these jets by first diffusing the jet down to a relatively low subsonic velocity. The small type SBL depends entirely on the diffuser for its noise reduction. An acoustically absorptive section follows the diffuser section in the large type RBL. HBL, RBS and HBS silencers, providing the additional silencing required by large volume flow. BLOWOFF SILENCER DESIGNATIONS When the gas being silenced is dry (air, methane, etc.) and rain is kept out of the silencer, the less expensive types RBL and HBL silencers are satisfactory. For use with steam or where rain can enter the silencer, types RBS and HBS must be used. The Models RBS and HBS incorporate our proprietary water resistant acoustic packing in the absorptive section to minimize the effect of water on their operation. The Model SBL silencers are inexpensive units for flows below that of the smallest RBL series. BLOWOFF SILENCER SIZING The maximum permissible flows for Model RBL, RBS, HBL and HBS silencers re given in TABLE 1. These units will handle and silence any flow up to that tabulated. Exceeding the tabulated flow rqtes may result in damage to the silencers, so be certain of the design flow. Flow rates for Model SQ|.'s are given in TABLE 2. CLUSTERING DISCHARGES Models RBL, RBS, H0L and HBS can be provided with several inlet connections, to allow one silencer to service several discharge lines. Sizing is still based on maximum total flow per TABLE 1. SILENCER EXIT ft INTERNAL VELOCITY The silencing effect can be negated because of aerodynamic noise generated within the silencer or by the silencer exhaust, if velocities excee^ 300 ft/sec Internal and exhaust velocities of Aeroacoustic Corp. Blowoff silencersare well below this value if sized per TABLE 1. BLOWOFF SILENCER ACOUSTIC PERFORMANCE Fin 3 gives dbA values ar various distances from an unsilenced, vertical discharge steam jet, based on actual measurements of a typical system. Figs 4 and 5 give the corresponding noise levels, also based on actual measurements when using RBS and HBS blowoff silencers. The small SBL silencer gives a 25 to 30 dbA reduction when used on 100 p.s.i. air. FIGURE 1 Long I stand Lighting Company Northport Powtr Station 360,000 KW powor control valva illencer (Blowoff Silencer) 320,000 PPH steam - 1,00(f F -- 2695 PSIG VEV-261040 Q SOUND PRESSURE LEVEL db re .0002 db A weighted V SOUND PRESSURE LEVEL db re .0002 db A weighted FIGURE 4. SILENCED STEAM JETS Model RBS SILENCER YEV-26104i .TABLE 1 Mini DinmtiAM. ImIim Mb. A C 1 12 12 60 -1.5 12 19 60 2 12 24 60 3 12 36 60 -4 24 24 60 5 24 39 68 6 24 36 60 7.5 24 45 60 9 36 36 69 10 36 40 75 -11 12 13.5 tfi 20 36 42 36 49 42 49 49 a 4f 60 75 75 94 94 84 -25 60 60 94 30 60 72 102 , 36 72 72 102 ' -42 72 64 102 49 64 94 101 56 84 96 120 64 96 K 123 72 96 106 123 1! toa 108 123 90 106 120 129 100 110 121 132 144 120 120 120 132 132 132 132 144 144 144 129 135 135 141 141 MAXIMUM FLOW CAPACITIES - STEAM Wl, lb*. MtM BBS Srtenwr In IMO PPM Sinn 250 f 500 F 1009'F Matffl H8S SiltMw In 1009 PPH Stum 250 F SM F 1000 F 220 275 41D &50 650 700 000 1.050 1.465 1.005 1.753 1.902 2.S2S 3.275 3.900 4.740 5.550 6.210 6.9S0 7.940 10.025 11.200 12.350 13,900 15.500 17,200 19.000 21.000 23.100 26.000 8.4 12.6 168 25.2 33.6 42 50.5 63 76 84 93 101 113 135 169 210 252 303 354 412 471 540 605 695 770 980 945 1040 1140 1240 73 11 U.6 22 29.2 36.5 44 55 65 73 80 88 96 117 146 112 220 260 304 354 405 462 $20 607 675 750 925 910 990 1080 6 9 12 IB 24 30 36 45 54 60 66 72 91 96 120 150 180 216 259 294 336 384 431 486 540 600 660 725 79$ 865 10.5 15.8 21 31.5 42 52.S 63 78 9$ 10$ 116 126 141 169 210 263 315 300 442 BIS 590 675 755 870 960 1070 1180 1300 1420 1550 91 13.7 192 275 36 5 44.5 $5 69 81 91 100 110 120 146 111 229 27$ 325 390 442 506 560 650 760 045 940 1030 1140 1230 1350 75 112 >5 22.5 30 37.5 45 56 67 75 82 90 101 120 ISO 188 225 270 323 366 420 480 540 610 675 75(0 825 90S 990 1080 MAXIMUM FLOW CAPACITIES - AIR M4el R8l $i)Mfr In <000 PPH Air BF 256 F 500 F MmIH HBl In 1000 PPH Air 60 F 250 F 500 F 14 21 2B 42 56 70 84 105 126 140 154 158 189 224 290 350 420 504 590 69$ 79$ 900 1010 1135 1260 1400 1540 1700 1850 2020 11.5 17 23 34 46 $7 69 86 103 115 126 138 156 184 230 288 345 415 483 565 645 735 825 930 1030 ttso 1270 1390 1520 1660 10 15 20 30 40 50 60 75 90 100 Iffl 120 135 160 200 250 300 360 420 490 560 640 720 910 900 1000 1100 (210 1320 1440 175 26 35 62 70 67 105 131 157 175 192 210 236 260 350 437 525 612 735 057 980 1120 1260 1410 T570 1750 1920 2120 2300 2520 14 4 21 5 29 43 58 72 96 109 130 144 158 173 194 230 288 360 432 520 605 707 008 922 1040 1160 1205 1435 1&90 1740 1900 2070 (25 16.8 25 37 50 62 75 94 113 125 137 ISO 169 200 250 312 375 450 525 612 700 600 900 1010 1120 1250 1370 1510 1650 1800 HORIZONTAL MOUNTING INLET AVAILABLE WITH WELO NECK OR FLANGED CONNECTION VERTICAL MOUNTING I TABLE 2 TYPE SBL BLOWOFF SILENCERS Single Unit Multiple Unit*; M*4 SOU 2 3 4 42 43 44 45 46 48 410 412 Ptp CaMKtiea Star* (IPS! 1/4 3/8 1/2 3/4 1 1/2 1 1/2 2 2 1/2 3 3 1/2 31/2 4 Am 0 in 192 2.56 4.14 6.60 11.0 160 160 160 21 0 160 210 21.0 0 83 1.06 1 70 2.60 15 1 15 1 rss 160 160 17 1 17 1 176 0hchr|<tSCFM at aPacrau SHinctf (Air) 1 PSI 10 PSI 106 PSI 9 25 79 14 45 H3 28 87 54 170 275 540 108 340 162 510 216 680 270 850 324 1020 410 1360 540 1700 650 2040 1080 1620 2160 2700 3740 4300 5400 6500 BLOWOFF SILENCER CONSTRUCTION The Blowoff Silencer has to handle very targe amounts of energy, during its' operating period and hence, has to be of very rugged construction. For example stram, at t,000*F and 1.000 PSI pressure?, vented to atmosphere through a 4" valve, will flow at a rate of 910.000 PPH and dissipate energy equivalent to 141,000 horsepower. Unsilenced, this jet wilt produce 1 >0 db of acoustic power referred to 10f * watts The AeroAcoustic Blowoff Silencer dissipates this velocity energy in the silencer diffuser section. In order to handle these tremendous amounts of power, the internal diffuser section of the AeroAcoustic Type R0L Blowoff Silencers is made of t/2" steel plate in the larger models To be sure of getting a Blowoff Silencer that can do the job and also stand up under the tremendous forces involved in the blowoff gas velocity, specify the AeroAcoustic Type RBL or SBL Blowoff Silencer. VEV-261042