Document KGQrRdKqgmjwQ8x88MqqgYZyo

+ tu S2h, s' -H- H SAFETY RESPIRATORY PROTECTIVE ' EQUIPMENT SSU0 THIS PACE RCVlifiO ENGINEERING STANDARD JAN 1SS4 JUNE 1SS4 S2H 6TANOAAO RfAPPMMEO JUNE 1SS4 P*S 1 of S fms s:*ncifO inducts rtquirsma.-ttj ot tftt Cccuaat'Ona ai r:. y\a Health Act ot 1970 (OSHAl as pu&lishtd in me Federal Register DSHA information is printed in red 1. SCOPE 1.1 Thie standard doee not apply for expoturr m airIvornr radioactive contamination for which vpecval conf idcrauon may be aeeetaary. 1.2 Du Pont policy and elated public position on engineering control* and respirator* it that "each em ployee i personal work environment should be main tained at a safe exposure level through implementation of coat effective engineering controls augmented anecessary by personal protective equipment and/or work practice control!." 1.3 This standard provides information for the selec tion. use, and care of respiratory protective equipment (respirators). The term "respirator" in this standard is used inclusively and applies to atmosphrrr-supplvmj.tnd air-purifying devices that provide breathable air to the wearer within the limits of the equipment, whatever the source of air. Administration (NIOSH/MSHA) ahall be used when available. 3.1.1 Respirators purchased attar Sapt 30, 1974 shall be manufactured per quality control plan approved under Tide 30. Code of Federal Regulations. Part II. Such equipment will bear an approval lahcl bearing the letters "TC" instead of "BM." 3.1.1.1 Excaptions. Self-contained breathing apparatus approved by Bureau of Mines under Schedule 13 through 13-E equipped with an audible end-of-servier life indicator and gas mask* approved by Bureau of Mine* under Schedule 14F is approved for uve until further notice provided they (1) were fabricated, assembled, or built under an approval or any mod ification thereof issued by the U. S. Bureau of Mines. Department of the Interior. (2) were purchased on or before June 30. 1973, and (3) are maintained in an ap proved condition. 2. GENERAL 2.1 Each aite should have a properly.trained individ ual responsible for the respirator program. 3.2 A list of the respirator* and their manufacturers! certified by M05H may be obtained by requesting HEW Publication No. 80 -- 144 plus cumulative supplements from: 2.2 Respirator training is available through ESI) spon sored course*. Ref (1) through (S) outline requirements for proper roapirntor program. The individual re* poosible for the aite program should be familiar **1th Fief (1) through (6). 2.3 Engineering Standard S9H outlines requirements for canister/cartridge use for sir-purifying respirator*. SIH for St testing, and S1H for air distribution. NIOSH Testing and Certification Laboratory 944 Chestnut Ridge Road Morgantown. WV 34S4S Division of Technical Services NIOSH Robert A. Taft Laboratories 4414 Columbia Parkway Cincinnati, OH 45224 ;i.4 Respirator* should not be used as a substitute for 3.3 At the present time, there are no approval sched ndequate exhaust ventilation or other feasible engineer ules for air-suppiied suit*. ing control methods. 4. USES AND LIMITATIONS 2.S Respirators ahall be worn at all times where the at moaphere may be bartafal to employees due to unusual conditions, and wiser* work is necessary in areas where worker* may be exposed above safe limit*. See S2T for information on exposure limit*. 11.4 Each locution shall develop written procedure* de scribing the seieetioo, use. and care of respirator*. 4.1 Users of respiratory protective equipment shall have medical approval. This should be documented in each person's medical record. 4.2 Thn air-purifying roapiratora; La., eaniatur gaa maaka, ahemieul-cartridge ronpiratora, and maohnniaaf-flltor raapiratora (Table 1C) ahall not ba unad tor raaeua work. These respirators do not supply 3. APPROVED RESPIRATOR* 11.1 Only equipment approved by the National Institute tor Occupational Safety and Health/Mine Safety Health oxygen and therefore do aot protect against possible oxygen deficiencies. Another reason for tbit require ment it that that# maaka are aot intanded for use against unlimited or unknown concentration* of contaminants. r onions onntao in rae a>* com OSHA regulations. Sactien tsio 13* CONFIDENTIAL suacousarru ho so Vendors and marchandisa designation* trs given to describe materials and may not mciuda all acceptable products. Substitutions by suppliers am w be made only on approval of ins local authority initiating Ova uae of trvs standard. DUP 0960S77 i'ilJilli.'I* __________________ I THt ooeuMCwr ts the property op c i ou pomt ot ncmoum amo company the tedprcal iMEAOUATWVa WGMKi'*- M4V W/hT tr*** MG^rVRlTPft VUTTWYlT T*r 0pm*%*n* Ot OSS fl*- DU 040787 32H Pg a N MSPIRATORY PROTECTIVE EQUIPMENT JANUARY IH4 Till* >W WOVJunetoea + 1*4 4.2.1 UTien the air it deficient in oxygen, the svmpioms range from increased volume of breathing and acceleration of pulta rate to unconsciousness and death, depending upon oxygen content and the degree of a perron'* activity. Unconsciousness to Immediate when a man breathe* pure nitrogen end death may follow In a few minute*. 4.2.2 An oxygen deficiency may indicate a hazard other than inert gaa: e.g., flammability (ace 4.4), akin toxiciu. or absorption through the akin, particularly hydrogen cyanide. Portable oxygen and toxic-gz* de tector* are deicribed in S3T. 4.7 Reapiratory protection may be required for cancer auspect agent*. Refer to OSHA regulation* for specific requirement*, Section 1910.1000 teries, and to SZT. 4.g An unconlaminated (upply of air muat be aaaured when tiling a ho*e tnaak with blower. 8. SELECTION 8.1 In aelecdng a reapirator, the following factora (5.1 - 5.1.4.1) and Tablea 1 and 2 abould be conaidered. Engineering Dept Report, Acceaaion No. 15147 "Reapir ator Selection,'' will provide guidance. SSH. o2 4.3 Air-purifying reapirator* ahould not be used in at mospheres immediately daagerona to life and health or when the contaminant hat poor warning properties, ex cept a* noted in S9H. 4.4 The following warning aigna require immediate re turn to freah air: a. 'jneomfortable heat in the inhaled air. (A prop erly operating canister will become warm on expoaure to certain gnses_or vapors, bat a caniater which become* extremely hot indicate* that concentration* above the canister Until have been encountered.) b. '(f nausea, dizziness or aigna of distress develop. ' ' C. 1 f the canister has a window indicator which show* the specified color change. d. I f any leakage is detected by ameil, taste, eyes, nose or ti roat irritation. a. Nature of the hazard b. Severity of the hazard e. Type of contaminant d. Concentration of the contaminant *, Period protection is required 1. Location of the contaminated area with respect to a source of respirable air ft. Expected activity of the wearer It. Operating characteristics and limitations of the available respirators i. Safety regulation* of state or local governments 8.1.1 Self-enailalnad breathing apparatus rattd for at lass) 30-minute iss-itaa dme should be ased for entry into potentially irraapirable atmosphere. 8.1.2 Self-oontained breathing apparatus with lea* than a JO-minute air supply shall be used only for emergency egress and not for rescue work or reentry. e. If high breauhing resistance derelope. 1.1.3 Operating time for self-contained apparatus Is based open moderate work rates. Operating time is 4.8 L'sett should select canisters and cartridge* speci redaced by Increased inspiration required by heavy fically approved for the toxic gas and eoneantration to be exertion. encountered. Canister masks that bear the label "All Service," "All-Purpose," or "Universal" should not be 5.1.4 Only poaHIva praaaur* self-contained used for a specific gas or vapor if a caniater is available breathing apparatus or eeintonation air-lino respira for that specific gaa or vapor. tor and atof-cantalnad breathing apparatus, shall b* used In oxygen-dafletont atawapharaa or wtwro tha 4.8 Many toxic gases and vapor* are flammable and the contaminant to, or might bo, biunodlotaty dangerous user could be exposed lo a potential fire or explosion. to Bfo and health (Table 1A). The air In the self- Work in aunoapharea in or nanr the flammable range la eontained unit of the combination air-line respirator and prohibited. When the possibility of flammable atmo self-contained breathing apparatus shall be used only for sphere* edits, a check should be made with an ex- egress in event the hoee-line supply of air is interrupted. plosimeter and pertuisaable concentration* confirmed The volume of this exit supply may vary for different prior to entry. Standard F4J provides Information and applications, but shall be ample to allow the worker suf instructions for use of portable flammable vapor and gaa ficient air to escape from the contaminated area. In any detectors. case, this supply shall nos be lass than 3 minute*. Portions points* inodira from OSHA regulate**. Soenon itiO.1000 son**. CONFIDENTIAL DUP 0960578 4T DU 040788 N JANUARY 1554 Tl^lt Pago Wav Juna 1554 RESPIRATORY PROTECTIVE EQUIPMENT 1 u "i I1H Pago 3 5.1.5 Escape masks arc used onl> for rut from oi throufh contaminated area. These mal>> in- air sup plied or in certain caaea a cartridge respirator mat l,,used For detailed information on lelrctmn and iimitutitm*. conault Haskell Laboratory* report- li-trd sRrf (7). (8). and (9). These reporta ahould Ik* a.aUaid< from thr Departmental OSH Coordinatora. 5.1.5 Entry Maskl. Lac aclf-containrd bn-atkinc apparatus with at leaat a 14-minute air supplv nr a cumbination aupplied-air rcapirator until aclf-rontainni breathing air apparatut. Unit ahall be of thr pmaumdemand type. The entry maaka ahould be located outatdtof the potentially affected area in a nonrontaminated aria and properly identified and protected. 5.1.7 Pirn Fighting. Lae aelf-contained heea th inp apparatus with at leaat a 34-rainule air supply. I nit ahall be thr prraaure-demand type. 5.1.5 Schedule 13E of the l'. S. Bureau of Mine, on aelf-contained breathing apparatut require, a remitining aervice-life indicator or wanting for compr rated breathing air (except for aelf-retcue). Thear ran and ahould be obtained from equipment supplier* for apparatus not to equipped. 5.1.5.1 When the device ia a combination aelfcontained breathing apparatus and air-linr mpirator (aupplied-air reapirator), either a manual or automatir valvefa) ahall be provided to change to the aelf-contained air aupply if the air-line aupply fails, and to prevent thr wearer breathing contaminated air from the outaide atmcaphere. If a manual valve ia provided, it ahall be easily oppibie and located in a position which ia convenient to the wearer. If an automatic valve ia provided, a warning alto ahall be provided to alert the wearer that he l> breathing from the aelf-contained air aupply, (1) when hit normal air-line supply faiia, or (2) when the aelfcontained air aupply faiia below 95 percent of it* full container preeture. A quick diaronnect and check valve ahall be provided between the appermtua and the air-line aupply hoae to permit reedy eecepe from the area, end to prt vent loaa of breathing air from the device or inhaling the aurrounding atmoaphere, reapectiveiy. analyaia auretnary. and G-7.1 for detaila including ampling and analytical procedurei. ' Qm Breathing Air Analyaia o i CO 1 `COi 1 Hydrocarbons - (eondenasd) , H|Ott __ 1 1 *1 | Odor 19.$ percent min to 23.S percent nuxt 20 ppei max 1,(64 pam max Dew point 1m than the lowest prekahle umparatxie to b* eneonntorodtt Balaam Fvm of pmoeaaeed odors ! j j ) 1 j v See SST tar data ae dirset rwUlse portable oayfra taajyian. d TWii it aacaaaary la sravaas frssw-iap sad ataap|f o1 airftae ' Uw await. Far lahlaa. iviar la '-Haadbaait of Caaiptstscd Gases." 5.2 A reliable nippUer ahould be choeen. Viait hit facilities to determine hit degree of control over the operation. If an air compressor ia used, it should be noaiubricated. If a lubricated compressor IS used, it muil have a carbon monoxide or high-temperature (or both) alarm. Annual contacts should be made to assure equipment and procedurei have not changed. 5.3 Preferably, certified breathing air should be pur chased from a reliable supplier. If a choice bee to be made between certified air front a questionable supplier and uncertified air from a reliable aupply, the latter would be the recommended choice. 5.4 Determine if the sir ia provided by eompreaaion or reconstitution (mixing nitrogen and oxygen) and analyte as follows: Msthooef Preparation Csmprssiiin - supplier does eat 511 cylinders with any yeaas other then air Ceaipreadea - supplier (Ilia cylinders with Iuse ether than air Analysts Recommend Qaack M perusal of cylinders from sack let for ppm CO and eder. Analyse ail cylinders for percent Oj. Chech Ip percent of cylinders from each lot lor ppm CO and edor. 5. BMATHINO AIR 5.1 Both purchased and manufactured breathing air hall meet or exceed the requirements of the speci fication for Grade D breathing air at described in Compressed Gas Association Commodity Specification G - 7.1.* See the following tabulation for Grade D * A/Ktaew trots Compresses Oas sesnnoion Inc. 1236 Jefferson Oavts honors pr-mae m rae wa iron OSHA roputatona Section itiiO ISA Hcceaslitutiea Analyse til cylinders for per* out Oj. Gseck 16 percent of cylinders frem etch lot for ppm CO and odor. 5.1 ia addition, a complete analyaia ihould be eonducted periodically to assure compliance with tabulation IT.___ -CPNFIDIf.TML ' DUP 0960579 DU 040789 S2H pa 4 ______________________ ' IV l , M RESPIRATORY PROTECTIVE EQUIPMENT JANUARY 1M4 TWe Pag# Wo Oct 1M3 .+ (.1 Purr us.gen shall not be used in open circuit, self. siroosphere-nipplying respirators. or in tir-lmr i.jv retfiiraturs. (7 * < lucrd circuit (rebreathing) ryacem recirculates riinirP nr make< up oxygen end remove* undesirable * '*' eirbon dioxide. Pure oxygen muet be uted , r. ir.r.r rnrmi, Systems epproved by the National In- m>ui- ter Occupational Safety and Health (NIOSH) >. uiilio * high-preaaure cylinder for oxygen may be ur.i i circuit oxygen generating-type equipment Oi*. rt tr uaed. 7. PRECAUTIONS 7 1 4n rttrntive lint of instruction* in use and pr-- auti v fur each type of respirator is given in ANSI /** i' Ntmr precautions are given in Table 1 under heading* "of i.uniutions and Remarks. a small positive pressure is maintained inside the facepiece at all times, such that if a leak should develop, there would be no leakage of contaminant into the facepiece. (See alto section 5 of S9H.) 7.5 A propor soil cannot ba aatabllahad if tha tempt# bar* of eyaglaaasa extend through the sealing edge of tulMace masfca. 7.8 Contact lenses shall not be worn with full-face mask*. See S4H. * 7.7 All eyepieces in full-face masks approved by the Bureau of Mines will pam the ball drop tost, but some plastic eyepieces may not past the needle drop teat (S4H). Current schedules of the Bureau of Minas, however, require that eyepieces shall meet the pertinent require ment* for impact and penatration specified in the most recent ANSI Z87.1, "Safety Cods for Ey* Protaction.'' 7.2 Th manufacturer's instructions or precautions of the 4 >l standard should ba poatad with tho respiratory drvirr 7.7.1 Full-face masks have been developed with systems for mounting corrective lenses inside the facepiece. Contact the' manufacturers for aaaiatance. 7.3 aii parsons who may hava oecaaien to uaa raapirateiy davtcas, or eauaa ttwm to ba uaod, than ba propa-ty tralnad In Utah uaa. Also, in execution of plant ehsaner plans, proper training in use of reqtiratory prMtm-u'e.. equipment will aid in the performance of amiaith and safe reacne or repair operations. 7.3.1 Training in tho ass and lit tasting of respirators is an essential part of a respiratory protection program and is specified in 05HA regulation*. Training shall be completed prior to lit testing. See SIH for fittesting protocols. Additional references are listed in secuun 9. 7.3.2 A slight negative pressure occurs inside the facepiece of face-fitting air-purifying respiretort (Table 1C). Care must be taken to obtain an alfoctivo seal be ta, een the facepiece and face to prevent inward con taminant leakage. Alto, damand-typa air-supplied respirators tnd demand-type stlf-oontainad rospirators operate under negative praasnre when the wearer inhales. Since sorte inward leakage of contaminant may be possible, these typos provide lam protection, when pur chasing new air-supplied, self-contained or combination type, pressure demand should be specified. 7.4 A pressure-demand type self-oontained respirator or sir-supplied combination (self-contained) should be used in atmospheres containing contaminants which cannot be detected by smell, irritation, or lasts, or where special precaution muet be taken to prevent the wearer from inhaling any trtre of contaminant. In this type equipment. 7.8 (Problems in the use of aelf-contained breathing ap paratus (SCBA) at low temperatures inehxie failure of exhalation valves duo to frosen exhaled moisture snd failure of the regulator or low air pressure alarm. These problems can be minimised by: a. Using only air with low asoisturo contain b. Installing a noaeeup in the made O. Thoroughly drying masks aftar cleaning d. itseptng SCBA* ia a warm location between uses (if practical) a. Visually cheeking pressure gage* for low air supply f. Following manufacturer's inatruetion* for use in aubfreexing environments Antifog compound! ean ba wed to coat the inaids and outside of the faeopieee to prevent ita fogging, down to about 32*F (0*C). Below 0*F (-18*C), however, antifog compounds wifi not prevent severe fogging. Antifog compounds break down aad rtquiro rsapplieation periodically. 7.8 A half-mask facepiece diould not interfere with the wearer's use of spectacles or goggles. Proper selection of equipment normally will eliminate any problem of proper fit when using a combination of half-mask facepiece and CONFIDENTIAL. Pon.ors cinisc in 'sd arc Inm OSH* regulations. Section tltO 134 M!|l|> DUP 0960580 DU 040790 4- 117 + JANUARY 1IM TIY l*a Wv Jun 1**4 N RESPIRATORY PROTECT!VI EQUIPMENT sah Aage $ 7.10 Person* required to wear respirator* mui be rlnn shaven In the area of the respirator seal, except * noted in Safety and Fire Protection Guidelines, Werlibn 9,13, i 7.11 Conventional respirator* do not constitute an ahxiiatr barrier to iranamiuion of speech. The respirator expiation valve usually providera satisfactory pathway fop'Speech transmission over short distances in reta il' ijT quiet areas. Speech transmission devices arr available. (Caution: check for acceptability of electrical rlajsificaiion for use in hazardous areas, and N105H apj!Yutal when mounted on respirator). 7.11 Hoses for air supply should be selected to resist chr micxls to which they may be exposed. Also, only hose approved for that respirator may be used. I. CARE t' . t.1 General. A centralized maintenance, cleaning, and mo,-air station should be used to care for respiratory protective equipment. 8.2 Procedure Applicable to All Respirators , ,8.2.1 Inepoction. All respirator* shall be in- -P(ftVii routinely before and after each use..Those held reariv for emergency use shall be inspected at least monthly and after each nae. 8.2.1.1 Self-contained breathing apparatus viisil lw inspected monthly. *8.2.2 Malntananeo. YChen it is necessary to re place worn or deteriorated parts, only those made specif ically for the device shall be uaedj and the repair work shell br accomplished by trained personnel. For airsupplied units at most plants, it is preferable that parts of subassemblies be replaced as a unit or returned to the manufacturer or factory-trained personnel for repair. 8.2.3 Cleaning and DMnfaotlng. Respiratory protective equipment, except canister* and cartridges, should be cleaned and disinfected daily. 8.2.4 Storage. All respiratory protective equip ment shall be stored in a clean, cool, dry place, out of dir-ct sunlight, under conditions of moderate tem perature. They should be located for easy accesaability and the location adequately labeled if necessary. Respi rators should net be stored in saefa places as lockers or tool boxes unless they art in carrying cases or boxes. 8.3 Special Procedures for Maintaining, Cleaning, taintacting, and Storing Respirator* 8.3.1 Seif-Contained Breathing Apparatus. Thr cylinder pressure shall br checked monthly and recharged if below rated pressure [corrected to 70*F (21rC)]. Recharge after each use, following manu facturer's instructions. Follow manufacturer's instruc tion* on functional teats for self-contained respirators rod3ns onmta tirMin (tent OSHA rsguUnont. Section tsto is* and hydrostatic testing of compressed-air cylinders. \-un- that regulator anil luw-pn-vsurt- tlartti- are functioning. 8.3.2 Cylinders shall be tested ahjl maintained as prescribed in the Shipping Container Specification Reg ulation* of the Department of Tran*|mrtatiun (49 CFR. Pan 173). ... _, . \ 8.3.3 Hoaa Masks. Check the blower period ically for proper operation. Check hose for wear and tear after each use and clean when necessary. Air-line hose capped when not in use to prevent entrance of dust or other contaminants. . '8.3.4 Air-Und Raspirators. The facepiece should be serviced after each use. or at the end of the shift, as for all other respirators. The flow control valves should be inspected after each use and cleaned and repaired, if necessary. Air-line hose should be checked for wear and tear after eaeh use and be cleaned when necessary. See SXM on air-euppiy system. ' 13.1 8ol1-R**euor. Monthly inspection is the most important phase of the maintenance program with this type of equipment because the equipment is seldom used but must always be ready. 8.3.8 Chamlea(-Cartridge Raspirator* 8.3.8.1 Cartridge* should be discarded after a predetermined period of use. See 59H. 8.3.7 Meehanleal niter Respirator*. Mechani cal filters of the "Ihrow-ewey" type should be discarded when the breathing resistance becomes bothersome to the wearer at the end of the work shift. Some mechanical filter respirators use redeanahle filters, in which case the filters are cleaned when the respirator is being aervioed. 8. RKFIRINCCS 1. Safety and Fire Protection Guidelines. Section 9.13 Respiratory Protection. 2. OSHA Respiratory Protection Standard CFR 29 1910.134. 3. NIOSH Publication 76-189, "A Guide to Industrial Respiratory Protection." 4. ANSI Standard Z38.2 -1960, "Practices for Respira tory Protection.'' 8. Haskell Lab Monograph. "Raapintor Catridge - Guidelines and Evaluation." 8. Engineering Standards S1H. SIH. S9H. and S2T. 7. Percival. L. F., "Escape Respirators." Haskell Lab . Report 327 - 82; MR - S46S - 081 (June 1982). 8 Percival. L. F., "Escape Respirators," Part 11. Has kell Lab Report 663 - 8L: MR -S391-001 (October 1982). 8. kayser, J. M. and Fisher, F.M., "Escape Respirator Study," Haskell Lab Report 573 - 83i MR-SS24 (January 1984). _ cON FI r:TSAi DUP 0960581 DU 040791 I3H * RESPIRATORY PROTECTIVE EQUIPMENT n .N JANUARY 1384 Thto PA0t Re* Sapt 1871 TAEUt 1 - TYPES OP RI3PBATORY PROTECTIVE EQUIPMENT (CONTO ON PAOE 7) TRMa 1A - Ml Method of Operation Air supply from auppHed-air Breathing apparatus. Saa S1H on air-cidrtbution lyttom. Uao Operating or ropair work where there to expowr* to eubeteneee that are irritating or eorroaive to the akin and mueoua memoranee. out where the atmoapnere la not Immediately dangerous to life. If immediately dangerous to life, the reaptratory equipment mould be provided aa in 5.1.4 and the eir-euppfied auit mould be kept with a alight poeitlve preaaura. in any eaaa the air eupply mould not be laaa than 18 minutae te allow the worker aufftelent air to eaeape from the contaminated area. A body hameaa ia raquirad to handle the hoee line and the life line, which alwaya mould be worn as a reacue device. Helper (wearing dmllar air-eupplted auit, body harnaae. and life line) mould be assigned with no other duttee than te obeerve the mm in the huardoua area, attend the life line and in emergency, aak for help and be ready to reacue the worker. (See 3180). UmNatone The wearing of an impennou* auit for any extended period la extremely fatlguktg md dangeroua unleea It la wall ventilated. The wit muat be impervious to the wbatmee en countered. with the longeat hoae length lor which uaa la Intended aaiambied to the reaoirator. and tna loweat inlet preaaura intended for ooqration introduced to the alr-euppfy hoea. conatant flow unite muat deliver it lean 4 cfm measured at the facepiece. The exhalation ramtance at 85 mart par minute mall not exceed 1 inch of water. Whan heimatt or nooda are uaad. the tame requirements muat be mat except mat tna how rata mud be at lead 8 etm. For both typaa of aaaambHaa with the highad inlet praawre and monad hoea length, tna maximum flow shall not exceed is cfm. Aemarfco No NIOSH* approval. For additional information, saa Flaming, A. J,, O'Alonzo. C. A. md Zapp. J. A- "Modern Oceupetionel Medicine," Chepter 7, `Protective Clothing for the Chemfeei Indudry," Lea and Fefefger. Philadflphla (1330). A ftanque-Hllecn vonex luoe** worn aa a portabta refrlgeraxx can satisfactorily cool com- praaaad air for oenonne! wearing Industrial protective clothing. The vortex tube ia light and small, and can be drappad to tna eeit where it doea not Interfere with physical movement. The tuba oparataa on 20 to 23 efm of compresaed air at 60 to 100 pd and delivers IS to 18 cfm of air cooled 50 to 80*F below the inlet air temperature. The tube can be iwvtraed and used ae e heater. 1 Mum inantuc* wr Omumimd titty an hmi*, u. ft. Otp ol hmnh, (mumk** n wifart * Aval**!* from CnooA Manrfacturinft Comoany ft. O. to Mftt-T* Houston. TX 77001 CONFIDENTIAL .DUP 0960582 DU 040792 1 JANUARY m* TTJ* Nf R*r Oct IMA respratory protective eqwpment t2K Clooorf ckcu il oiygoo y o t m f n f ly p t EqUprwnt to AM appotftJ kx u m| DUP 0960583 DU 040793 *iMtL&8idiilfcffil ntisfeAttgfcil ir DU 040794 f DU 040795