MILITARY VALVES, FUEL SHUTOFF, MIlkv-8608A 19 APRIL 1963 SUPERSEDING MIL-V43608(ASG) ~ 14 JULY 1953 SPECIFICATION ELECTRIC MOTOR OPERATED Thi8 $pecijlcation ha8 been approved bu the Department of Detenae and f8 man- datorv for uae bv the Df?PWbJKW8 of the Armu, the Navy, and the Aft’ Force. L SCOPE 1.1 Scope. Thisspecificdion covors electric motor opermted fuvl shutoif valves for use in aircraft and mis9ilo fuel systems. 1.2 Cla&~i5cation. Fuel shutQffvalvesshall be of lho following I ypc.s Mld sizes, asspecified (two G.2): Type I—Valve, motor operated TypO 11—VRIVc, motor operated with nmuuml ovcrrido Typo III—if:dvc+ motor operuted with therwud rolicf Typo Iv-–v 11 Vo, motor opmwted with xnanuo,low mide md thormd relief Size l—1’or u wwith l-inch OD tubing Sizo 11~—For uso with 11~-inch 011 tubing Size 1~~—I?oruse with ll~l-inch 01) tubing Size 2-For uso with 2-inch OD tubing Size 21/2—For uso with 21~J-inch OD tubhg Size 3—l?or uso with 3-inch OD tubing Size 31/2—For uso with 31/2-inchOD tubing Size 4—I~or US(J with 4-inch OD tubing 2. APPLICABLE DOCUMENTS 21 Tho following documents of the isme in ( c. ffcct on dt~t c of i n \ ;it itt ion for )ids orrcqued for propos:il, form a part of thisspecification to tho extent spcci fid herein: SPECIFICATIONS FmmIux, P-S-C61—Solvent, Dry-Cleaning NN-r-515—Plywood, Container Grade Q&C-320-Chromium Plnt,ing (Eloctro- depositid) QQ-I’~16-Pl[~ting, Ciidmium (Electro- dcposited) .. 687607-63 PPP-B-566-Boxes, Folding, Paperboard PPP-11-601-Boxss, Wood, Cleated-Ply- wood PPI?-B-621-I?oxM, Wood, Nailed and Lock-Corner PPP-11-639Box, Fiberboard PPP-B-676-Bcxcs, Set-Up, Paperboard lIIIJITAI{Y MILP-116—Preservation, Methods of MIL-B-131—Ba.rrier Material; Water Va.porproof, Flexible MIL-A-140-Adhesive, Water-Resistant, Waterproof Barrier-Material MIL-S-31313-Standard Test Fluids, Hydrocxrlxms MHA2-5015—Connectors, Electric, “AN” ‘1’ypo MIL-W-5086-Wire, Electrical, 600-Volt, Copper, Aircraft MILI+5272-Environmental Test i n g, Acronitutical and ,~ssociated Equip- ment, GeneralSpccificntion for MII~G5501-CWps and Plugs, Protective, Dust and Moisture Seal MIGE-5557-Enamel; Heat - Resisting, Glyccryl-PhthaMa, Black MI L-G-5572—Gasoline, Aviation: Gradea 80/87, 91/96, 100/130, 115/145 bfIL-,T-5624-Jet Fuel, Gradas JP-4 and JP-5 MIPI-6181-Interference Control Re. quirements, Aircraft Equipment MTL-P-6W6-Plates, Identification MIIfiF-7024-Fluids, Calibrating, for Aircraft FuelSystem Components r==l” 1 .... ,, ,., ,, Downloaded from http://www.everyspec.com
Transcript
MILITARY
VALVES, FUEL SHUTOFF,
MIlkv-8608A19 APRIL 1963
SUPERSEDINGMIL-V43608(ASG)
~ 14 JULY 1953
SPECIFICATION
ELECTRIC MOTOR OPERATED
Thi8 $pecijlcation ha8 been approved bu the Department of Detenae and f8 man-datorv for uae bv the Df?PWbJKW8 of the Armu, the Navy, and the Aft’ Force.
L SCOPE1.1 Scope. This specificdion covors electric
motor opermted fuvl shutoif valves for use inaircraft and mis9ilo fuel systems.
1.2 Cla&~i5cation. Fuel shutQffvalves shallbe of lho following Iypc.sMld sizes, as specified(twoG.2) :
Type I—Valve, motor operatedTypO 11—VRIVc, motor operated with
nmuumlovcrridoTypo III—if :dvc+ motor operuted with
therwud rolicfTypo Iv-–v 11Vo, motor opmwted with
xnanuo,low mide md thormd reliefSize l—1’or uw with l-inch OD tubingSizo 11~—For usowith 11~-inch011 tubingSize 1~~—I?orusewith ll~l-inch 01) tubingSize 2-For uso with 2-inch OD tubingSize 21/2—Forusowith 21~J-inchOD tubhgSize 3—l?or usowith 3-inch OD tubingSize 31/2—Forusowith 31/2-inchOD tubingSize 4—I~orUS(Jwith 4-inch OD tubing
2. APPLICABLE DOCUMENTS21 Tho following documents of the isme in
(c.ffcct on dt~tc of in\ ;itittion for )ids or rcquedfor propos:il, form a part of this specificationto tho extent spccifid herein:SPECIFICATIONS
k FORCE-NAWAERONA~CALBULLETINNo. 43??-Age Controls for Synthetic Rub-
ber Parts
(Coplca of speoificntionsc standards, drawings, and~,ublications required by suppliers in connection withBjwcifw procurement functions should be ohtaiuedfrom tho procuring activity $or us dirertrd bY thecontracting otiker. )
3. REQUIREMENTS
3.1 l:reproduction. This specificationmak& provisions for preproduction testing{SCO1.3.1and 6.2).
3.2 Materials. bfatorials and processesused for the manufacture of fuel shutoll’ valvesshall he suitable for the purpose, and shall con-form to tipplicalh Government specifications.Materiuk: con forrning to contractor’s specifica-tions may IN used provided the specificationsme released by the Services and contain pro-visions for mlcquat.etests. The uso of contrac-tor’s specifications will nut constitute waiver ofGovernment inspection. All materials tiedin the valve shall be sutlicientlyresistantto fuelsconforming to Specifications MIL-S-3136,MIL-G-5572, and MII.#-5624 with aromatimof Oto 30 percent to assure satisfactory opera-tion as hereindefined.
3.21 Metals. All metals used in the con-struction of fuel shutoff valves shall be of a ‘%.corrosion-resistant type or shall be suitably pro-tected to resist corrosion during the normalservi~ life of the valve. The use of dissimilarmetals shall h avoided wherever practicabl~or used in accordance with Standard MS33586.The use of magnesium or any alloy thereof isprohibited.
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3= Cadings. castings shall be ckmn,sound, and free from blowhol-, porosity,cracks, and any other defects.
323 Seledion of rnderiu.b. Specificationsand standards for all materials, parts, and Gov-ernment certification and approval of processesand equipment, which are not specificallyy desig-nated herein and which are necessary for theexecution of this specification, shall be selectadin accordance with Standard M~STD-143, ”except as provided in the following paragraph
3.23.1 Standard park Standard parta(MS and AN) shall be used wherever they am+suitable for the purpose, and shall be identifiedon the drawing by their part numbers. Comm-ercial utility parts such as screws, bol@ nu~and cotter pins may be used, provided they
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MILV-8608A
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possess suitable properties and are replaceableby the standard parts (MS and AN) withoutalteration, and provided the correspondingstandard part numbers am referenced in theparts list md, if practicable, on the contrac-tor’s drawings. In the event there is no suit-able corresponding standard part in efl~t ondate of invitation for bids, commercial partsmay be used, provided they conform to thisspecification.
33 Design and construction.3S1 Degigtt. The valves shall permit the
shutoff of fuel in either direction, They shallwithstand the pre.wures that may be encoun-tered in fueling services as specified herein.
3.3.1.1 Manual override. For valves whichrequiro provisions for manual override, the op-eration shrillnot require the use of special tool%and tho vnlve shall be capable of being com-pletely opened or closed in a time not exc~ding10seconds for either operation.
3.3.1.2 Pogition indication. Valves shallprovide an external position indicator. Themanual override hmndlomay be used as a posi-tion indicator.
3.3L3 Thermal relief. For valves whichrequire provision for thermal relief of fuel pres-sure, the unit shall relieve in either directionto the low pressure side of the valve at a differ-ential pressure of 120*15 psi.
3.3.1.4 Draim Drain openings, ~-inchminimum diameter! or equivalent~shall be pr*vialedto prevent any leakage past the shaft sealfrom entering the achmtor case for any valvemounting position.
3.3.1.5 Weight< Minimiz~tion of weightsIM1lbo a design considomtion to the maximumdegree attainwblo consistent with all other re-quirementsof this specification.
3.32 Conduction. The valve shall be cm-structed to withstand the strains, jam, titra-tions, and other conditions incident to shipping,storngo, installations, nnd service use.
3.3.2S “0” rings. All ~’0” rings shall con-form to Standard M’S29513.
32.3 Dimemiow Valves shall conform tothe manufncturcr’s drnwings, as approved bythe procuring activit.y.
3.%3.1 Portg. Ports shall conform to Stand-nrd MS337W.
33.4 Lubrkatim The valve shall operatasatisfactorily without the use of lubricants, forany moving pa% ~ther than fuel ~ the valv~Valves requiring lubrication of any movingpart shall be designed and constructed to pro-vide adequate protection to insure that the lu-bricant will be retained at all times duringnormal operation and during all of the testsspecified herein, and care shall be taken to pre-vent the use of an excssa of lubricant whichcould adversely affect low temperature opera-tion.
33.5 Indicator ohd. Provision shall bemade for indicator circuits which indicale full-open and full-closed positions. The circuitconcoctions shall be specified on the manufac-turer’s drawings.
3.4 Interchangeability. All parts havingthe same manufacturer’s part number shall bedirectly and completely interchangeable witheach other with respect to installation and per-fornmnce. Changes in manufacturer’s partnumbers shall be governed by the drawing num-ber requirements of Specification MIL-D-70327. Actuatom shall be removable and inter+changeable without disassembly or adjustmentof either thevalve or the actuator.
3.5 Electric motom3.5.1 Lubrication. Motor shall not require
lubrication during the entire life of the valve.3.5.2 DC operating voZtage. Valves used
in a 28-volt direct current (dc) electrical sys-tem shall opera~ satisfactorily over a range ofvoltago from 18 to 30 volts dc at pressures fromzero to the maximum operating pressure.
3.521 Brwh life. It shall not be necessaryto replace the brushes during the life of theequipment. Brushes shall conform to Specifi-cation MIL-M-8609 with respect to fit andposition.
3.5.3 AC operating vottage and frequency.,Valves used in 115/200-volt, 400-cycle electri-cal systems shall operate satisfactorily at anyapplied frequency between 380 and 420 cps andat any applied line-to-lino terminal voltage be-tween 1!)0and 220 volts, at pressures from zeroto themaximum operating pressure.
&5.4 Operating torque. Actuator musthave sufficient torque to C1OSOagainst a shutoff
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MIL-V-8608A
preswm of 60 psi and open against pressure asdetmnined by the thermal relief sett~g.
3.53 EleotricaZ receptacle. Electrical re-Ceptach shall conform to Specification MIL-C-5015, and shall mate with MS3106-14S-5S,whose pin arrangement is as follows:
~-Pin A—Energize to openPin B—Energize to closePin C-Signal openPin D-Signal closePin I&Common ground+ircuits not to be
internally grounded to frame3.5.6 Interrupted operatwn. W%en the con-
trol switch is reversed while the valve is inmotion, the valve motion shall be reversed with-out completing its motion in the originaldirection.
3.5.7 El+xtriccd@iZwe. The valve shall beso designed that in the event of inadvertentenergization of both the opening and closingterminals or electrical power failure, the valvewill remain in the selected position. The valveshall not change position due to normalmechanical forces.
3.5S Radio interference. The valve shallbe designed to conform to Specifhtion MIL-1-6181.
3.6 Wire. Internal wire shall be in accord-ance with Specification MIL-W-5086 or MIL-W-16878.
3.7 Screw threads. All screw threads shallbe in accordance with Specification MIL-S-?742.
3.8 Locking of parts. All threaded partsshall be securely locked by cotter pins, safetywiring, self-locking nuts, or other, ~pprovedmethod. self-locking nuts shall conform toSpecification MIL-N-25027 and shall be usedin accordance with Standard MS33588. Self-locking nuts shall not be used when looseningor disengagement of the nut could result h nutor other part.aentering the fuel system. Safetywire shall conform to Standard MS20995 andshall be installed in accordance with StandardMS33540. The use of staking or lock washersis prohibited.
3.9 Synthetic rubber parta3.9.1 Age controls. Age controls shall con-
form to ANA lhdletin No. 438.
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3.92 &rzvkeabiZity. Ml synthetic rubberparts shall be readily replaceable with a,mini-mum removal of attaching ~arts.
3.9.3 Uniformity. For valvee which in-clude parts fa!xicated from synthetic materialin contact with fuel, manufacturers shall con-trol subsequent batches to provido foruniformity.3J0 Finish.3.10.1 Anodizing. All aluminum-alloy
parts in contact with the fluid or atmosphemshall be anodized in accordance with Specifica-tion MIL--A -W25 or shall be adequately treatedin some other acceptable manner for corrosionpreventiwl.
3S0.2 Surface Lreatment of parts. Steelparts, other than corrosion-resistant steel not inmoving contac~,shall be cadmium plated in ac-cordance with type H of Specification QQ-P-416. Wcnring surfaces shall be chromiumplated in nccordnnce with Specification QQ-C-320 or adequately treated in some other accept-able manncr for corrosion prevention where thegalling of cadmium plating would cause mal-functioning. 13rass,bronze, and copper-alloyparts shall be cadmium plated or adequatelytreated in some other acceptable manner forcorrosion prevention, Stainlesssteelparts shallbe passivated.
3.10.3 Paint fini8?L.Any part painted shallbe finished with one coat of primer conformingto type I of Specification MIL-P-$585, and onecoat of enamel conforming to type II or IV ofSpecification MIL-IW557. Parts or portionof parts that come in direct contact with fuelshall not be painted.
3.11 Performance. The valve shall satisfythe performance requirements of section 4 andshall satisfactorily completi the tests.3.12 Markings. All markings slmll be per-
manent to prevent obliteration resulting fromservice usage.
3.13 Identification of product. Equip:ment, assemblies, and parts shall be murked inaccordance with Standard MIL-ST&130.
3.13.1 i’Vam.epf?4zte. A nameplate conform-ing to Specification MIIEP-6W6, properly andlegibly filled in, shall be securely attached to thevalve or the same information may be etched,
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I engraved, or embossed in a suitable location onthe valve. In adllition to the marking requiredby Standard MHX3TD-130, the ‘followingshall be included:
VALVE, FUEL SHUTOFF*, ELEC-TRIC MOTOR OPERATED**
Specification MIL-V-8608APurchaser’s Part No. (if applicable)Manufacturer’s Part No.Manufacturer’s Serial No.Manufacturer’s namo or trademarkus
3.14 Approval for production. Valves fur-nished under this specification shall be of adesign, model, and type which has satisfactorilypassed tho prcproduction tests.
3.15 Workmanship. Attention shall begiven to neatness:irldthoroughness of assclnbly,alignment of p:lrts, tightness of assemblyscrews and bolts, marking of parts, and removalof burrs and shar])edges.
3.15.1 Cleaniny. All parts shall be cleanand free from dirt, sand,metal chips, and otherforeign matter dllring and nfter assembly.
. 4. QUALITY ASSURANCE PROVI-SIONS
4.1 Responsibility for inspection. Unlessotherwise specifixl in L11Ocontract or purchaseorder, the supplier is responsible for the per-fornmnw of all inspection requirements asspecified herein. Except as otherwise specified,the supplier may utilize his own facilities orany commercial laboratory acceptable to theGovernment. The Government reserves thoright to perform any of the inspections setforth in the specification whero such inspectionsare deemed necessary to asslbe supplies andsqrvices conform to prescribed requirements.
4.2 Classification of tests. The inspectionand testing of fuel shutoff valves shall beclassifiedas follows:
4.3 Preproduction tests.-43.1 I%production test 8ample8. Tho pre-production test samples submitted shall consist
●The appUcable mhfltionnl modlilera, euch a8 globe, gate.(To be entered by the manufacturer. )
●*The appllceblo voltage. (To be entered by tho Manufac-turer.)
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of six fuel shutoff valves of each manufacturer’s,.
part number upon which approval is desired. “,
Three of these valves shall have been tested bythe manufacturer ~ accordance with this speci-fication prior to being forwarded to the testingactivity. (Each manufacturer’s part numbershall be approved separately.) An opportunityshall be given to the Government inspector to-witnessthe tests,and his signature shall appearon the test report. These valves shall be ac- .companied by one complete set of detail andassembly drawinga, wiring diagrams, and acomplete test report showing results of themanufacturer’s tests. These drawings slmll bein accordance with Specification MIL-D-70327, The test report should indicate con-formance to all requirements of this spccifica-tion referriug specifically to the applicableparagraphs in tho speciticntion. Samples iden-tified as r(quired shall be forwarded to tile test-ing laboratory designated by the procuringactivity.
43.2 Tests. The preproduction testsof fuelshutQff valves shall consist of the followingtests, conduct>d in the order listed, as describedunder 4.& T! N preproduction testsmay, at theoption of th~ procuring activity, be supple-mented with tests under actual or simulatedservice condif ions.
?‘eateExamination of product-----------Exploslon proo. 1-----------------Vttlve body and shrift seal lealtage-CIosed valve ni I pressure leakage--Closed valve fu :1 pressure leuknge-CIowd valve oi I. suction leakage---WmtamitmM f lel endurance ------Accelerated coI rosion --------
“eet#ExftmInation 0C product --------Preaaure drop --------------------Valve body and shaft seal leakage-Closed valve air pressure leakage--Closed valve fuel pressure leakage-Thermal relief operatiort --------
1 If the method of conducting the explosion-proof teat willrender the u❑lt uneatlefactory for the renmlning Iests, thistest shall be couducted on a eeparate additional teqt semple.
Salt ~my ----------------------- (4.t3.13.~)Maaaaambly and inaptwtlou ------- (4.0.13.7)
Ta$t8 valve8IBxaminatlon of product ---------- (4.6.1)Valve trady and ahttft netil leakage- (4.0.3.1)Closed valve fuel pm~sure Ieokace- (~.O.3.2)J’uel raalstanca and low tempera. (4.6.7)ttlre.
Radio intetiereum --------------- (4.0.12)Humkllty ----------------------- (4.0.13.5)Dtaaueembly and Iuspectlon ------- (4.0.13.7)
4.4 Quality conformance test& The qual-ity conformance testsshall consist of individualteststtndperiodic sampling tests.4A.1 lrufivitfmr2 teutu. Each wdvo shall be
subjected to the following tests, as describedunder 4.6:
I!&amlnatlon of product ----------- (4,6.1)V alTe b a d y ●nd shuft seal lenkage- (4.0.3.1)M ralve alr jmuaure Ieaknge (4.&3.3) (4.0.3.2)or elaaed valve fuel preaauraleakage.
lhermal rellef oltertttlm ---------- (4.C.G)Dielectric strength und Iumdatlon (4.0.11)raalstanw.
mmcttonal ---------------------- (4.0.10)
4A92 Periodic sampling teats. Ono valveshall be selected by the i]wpector from each lotof not more than 200 ox f rwt ion thereof on theorder, and subjected to the burst pressure testspecified in 4.6.13.6. {
4.4.3 Rejdon and rdd. When one itemettlected from a production run fails to meet theqeciflcetion, no itam still on hand or latarproduced shall be ●-pted until the extant anduuaa of failure are determined.WI lndivitftui teds may continw. For
operational reasons, individual teats may beemtinued pending the investigation of s sam-pling teat fsilura But final acceptance ofitune on hand or produced later shall not be
i ; ; )made until it is determined that items meet allthe requirementsof the specification.
4.4.4 Defects in iteT
aheady tuxepted.The investigation of a te t failure could indi-cate that defects may exist in items already ac- .,cept.ed. If so, the contractor shall fully advise ,.
the procuring activity of nll defects likely tobe found and methods of correcting them.
4.5 Test conditions4.5.1 Cleaning. Prior to testing the valve,
t.dlin(cn,.tl ports nornmlly in contact with thefuel, dmli he thoroughly cleaned to remove alllubricants nmi foreign mnttor.
4.5.2 {’lows’ wr+?weleakage te~t8. For thoC1OSIXIi-xlI.Wlcnkago tests, the test setups shallbo simil!lr to figuro 1, or shall bo such as to giveequivnlwl[ resulls.
4.53 ?’cd $wU, Unless otherwise specified,fluid ]tl :locordimcowith Specification M.IIEG-557? gm do 100:130 or grade 115/145, or Speci-ficntim~MJrA541M, typo I, shrillbe used forall tmls. ..4ny fluid conforming to Specifica-tion P-S-661 or any other fluid acceptable totho procuring activity may be used us u sub-stitute for tho test fluid for all tests, except {’those tcs! .s wherein o specific fluid is specified.
4.5.3.1 Room temperature and prewre.Unless otherwise sperified, nll tests SIUII1beconducted with the VRIWund fuel nt n roomtcrnpwtih]re betmwn 60° and 90° F uml i~tnt-mosphcric pressurr.
4.5.3.2 Operatinq t“oltage. Unless othorwieospccifkd, vnlves sIM1lbe operated at u terminalvoltxgo of 2721 volts dc or 115A 1 volts nc.
4.5.3.3 Aotuator. At no time during testingof the wdvo shall the actuator be immemed inthe test fuel or other liquid, unless the ttctuatoris specifically designed for submerged instal-lation.
4.6 Test methods.4.6.1 Examination of prodwt. Each valve
shall be examined to detarmine conformance “” “”with this specification. Partkxdar ttWmtionshall be given to materialq workmanship, di-mensional requimmen~ special p~ ucuraq of teat reaul~ fin% and markbga
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MLV4608A
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PRESSURE
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~ULATOR
~TANK VENT VALVE
(MA’s’ TyM+
10G PSI PRESSUREGAGE- L~sT s]~~(),, VA~~
CLOSEDVALVE FUEL PRESS!M LEAKAGE
11 1 n
TEST SHIJTOFFVALVE~ ‘ ‘ 1
CLOSED VALVE AIR PRESSURELEAKAGE
TEST SHIJ’IW’FVALVE-
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VACI.J[ BURETTEVA(XJ’UMS(NJRCE-
MERCURY3-WAYVALVIi
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CJ~J~> ~ VALVE
CIASED
lhum 1.
1 1
VALVE AIR SIJCTIONLEAKAGE
C?oaed vahe kkage teat 8etup8!
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,.,MIL-V-8608A
4$.!2 Praure drop. The pressure dropthrough the valve shall be determined up to thefuel flow specified in the applicable drawing,using a test setup similar to that shown infigure 2. The pressure drop shall be obtainedfor the two lengths of tubing and fittings be-tween the pressure taps and the valve cxmnec-
“ tions. The pressure drop for the valve is thedifference between the pressure drop for thevalve and tubing with fittings, and the pressuredrop for the tubing with fittings. The pressuredrop across the valve only M calculated aboveshall not exceed 0.25 psi. Sufficient data shallbe recorded to permit the plotting of curves.The pressuredrop graph shall show tho pressuredrop of the valve using the test fluid and thepressure drop corrected to fuel in accordancewith type II of Specification MIL-F-7024(reference specific gravity 0.770, reference vis-cosity 1.17 centipoises). The graph shall indi-cate the formula used to correct from the tedfluid to the corrected pressure drop.
4.6.3 Leakage.
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4.63.1 Valve body arad8huft 8ed teakage. 0 ,’
Without immersing the actuator, the valve shall 1’
be immersed in fuel or other suitable liquid,and vrith one port pluggq, air pressure fmm
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0 to 120 psi shall be applied to the other port.,,
The valve shall be operated through 5 com- .,
plete cycles. There shall be no external orshalt SMJ leakage at any pressure fmm O to120 psi.
4.6;3.2 Closed WZJVefud premwe leakage.Fuel under pressures of from 4 inches of fluidto 5 psj in 1-psi increments and from 5 to 60psi in lo-psi iucrcments, shall be applied tocxch port in turn with tho valve in the closedpositicm. A f[or m2-minuta maximum waitingperiod: lwdwgo sIM1lnot exceed 0.5 cc per min-ute at ally pressure from Oto 60 psi for vnlvesfrom 1- to f?-inch sizes, inclusive, and shall,notexceed 1.0 cc por minute for valves of 3- and4-inch sizes. For quality conforrnanca testsonly, leakage shall be measured at &ssura of4 inches of fluid, !25 and 60 psi only.
GLASS STAND PIPE(4 H OBS)
SCALE GRADIJATEDINTRJTHS OF AN INCH
CALIBRATEDFUELFLCWETER
TANK
I I u “TEST SHUTOFFVALVE— /4W1 A l
II
L PRESSURETAPS J
L = 10 X DIA OF TUBING
Frmrm 2. Prem4re drop ted 8etup
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4.6.33 C?20sedva.kve air preawre leakage.‘.
With the int.m-rmlparts of the valve wet with,,. fuel, but not filled with fuel, air pressures
.,. equivalent to 4 inches of fuel to 5 psi in l-psiincrements, and from 5 to GOpsi in 10-psi incre-
,, ments, shall be applied to each port in turn withthe valve in the. closed position. For quality
.,, conformance tcxstsonly, leakage may bo meas-ured at pressure.iequivalent to 4 inches of fuel,25 and 60 psi oidy. If the leakage exceeds 10cc per minute of freo air at pressures from 5to 60 psi, the closed valve fuel pressure leakagetest shall replace this test.
4.63.4 Ckwed vabe air wction Lwkage.With the internal parts of the.valve wcttcd withfuel, but not filled with fuel, air suction of O,.to 6 psi shall be applied to each port in turnwith the valve in the closed position. The totalleakage through (he valw-scaling elenwnt, theshaft seal, joints, and the c:wing shall not exceedIO,ccper minutr of free air at any sucticm fromOto 6 psi.
4.6.7.5 Dynmnic kalwqe. Fuel slml! be di-rected through 1l~cvalve st the ra.todflo,’; speci-fied in tablo I W;(h the s!mtoff pressure :!~60 psi.The valve shall bo actuated from open tu closed,and at the end of a %roinuto waiting period,with the ehutoff pressure maintained at 60 psi,the leakage shall not exceed 0.5 cc per minutefor tho“l-inch through 2-inch valve and 1.0 cofor the 21Aand 4-inch sizes. The flow shall bereversed throi@ tho vtdvo and the testrepeated.
46.4 Vi&ration.I 6.4.1 Vhatwn range. The vibration -t “
sh \1 be conducted in accordance with Vibra-t,ic \tests,Procedure XII of Specification M.IL-E- )272,with ap .aratus consisting of a suitable
!de ice for mou ting and vibrating the con-ncctod component through the fo~owingr~nges:
(a) 0.050 inch double amplitude (total ex-cursion from 5 to 10 cps).
(b) 0.036 inch double amplitudo from 10to 75 Cps.
(c) 10g vibratory ac@eration from 75 to300 Cpsm
(d) 15g vibratory acceleration from 300 to500 Cps.
4.6.4.2 Re80nant frequency. The vaJvewetted with test fluid shall be operated at thetest cycle frequency of footnote ‘ of table IIwhile concurrently scanning the frequencyra.ng~for resonant frequencies. The frequencyof vibration of the valve shall be varied slowlyfrom 5 to 500 and back to 5 cps with the ampli-tudes iildicated in 4.6.4.1. If resonant fre-quencies aro encountorcd, the valve shall bevibrated successively along each of its mutuallyperpendicular axes for 4 hours; or 6houm, with:L circular motion in the horizontal p]ane, and6 hours with a circular motion in the verticalplane at the resonant conditions with the ap-lJlicd double amplitude or vibratory accelera-tion as previously noted. When more fian one ~resonant frequency isencounteredwi~ vi’b~-tion applied along any,-one axi~ or with cir-cular motion in any one plane, the test periodmay be carried out at the most severe resonanc~or the period may be divided among the re-sonant frequencies~whi~ever is conside~d mostlikely to produce failure. The valve shall bevibrated half of the test period in the open posi-tion and the other half in the closed position.The valve shall remain in the selected position.Upon completion of this test, the valvo shall besubjected to the closed valve fuel pressure leak-~,g~t,est,(4.6.3.2). There shall bo no evidenceof malfunctioning, damage>lomning, or le~-age of the vnlve or valve parts as a result ofthis test.
9
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,..
MILV-8W8A
Test
Period
Test twtupor VBIVCconfigur:ltion.
Test pr~,ccdureduring juriod.
Ambient andtest fluidtemperature
Number ofperiod8
Test aftercompletion ofperiod.
TABLE IL Endurance test schedule 1
Dry cndurancc
Bud urance and altitude
Suitable test setup,60,000 ft. pressurenltitude.
.--. .— .-. ..- .—-(a) Dry with open
ports, v:llvoC1OWA,4 hour,] at158° +2° F ntsea level pressure.
(b) Cycle vrdvc for600 cyclrs dryat tm~ altitude.
(c) Wet valve withtest fluid.
Room
4
—After final period,conduct closed valvefuel pressure le a k a g etat.
Room temperature i
Suitable recirculatingtc~t Setup.
——. —-(a) Cycle wdvc for
5,500cyclescirculntiug ti.stfluid tbrollgh thevalvo at the flowrato of tufdc I nndilnposing 60 psi ontho vnlvc iu “off”position.
(b) &e.’
Room
1
Conduct the folfowingtests:(a) Valve body and
shaft seal leakagetef3t.
(b) Closed valve airsuction leakagetest.
(c) Closed valve fuelpressure leakageteBt.
Wet endurance
High temperature ‘
Suitaf}le recircu-lating test eetup.
—Cycle valve for2,000 cycles as forroom tempwhturcperiod, except thntthe ffOW should bcin tbc oppositerlircclion and rak,dflow need nob f>eo.chievcd.
130”* 5° F
—1
None; however,there shall be novisible leakage fromthe valve duringthe test.
Low temperature
Suihble recircu-lating test setup.
—..Cycle valve for600 cycles as forroom temperatureperiod, cxccpt thatthe flow should bein tflc oppositedirection and ratedflow need not beachieved.
–67° &2° F
,..1
None; however,there shall be novisible leakage fromthe valve duringthe trot.
.,,.
1The ted CYC1Ofrequanc shall be such that the tetal operating time ofJl
I The dyaamlo leeka~ tatshallb ccmductd at the bedmdwr of tlIOthe motorwlil bs not less an a miautcs normore tbsn 6 minutes out ofaschf!a minutf4 of opemtbn.
roem tampwahme tmtperiod; at rbpproxinmtdyhalf way through theswrkd;snd ~in M tbaoonolusbmof thoP&’@&
4.6.4.3 Vibration enduramce. Sh\uld noresonant frequencies be encountered as de-scribed above, the valve shall lbe vibrated “for6 hours along each of its mutuaIly perpendicu-lar axes, or for 9 hours with a circular motionin each of two mutually perpendicular planesat an applied double amplitude of 0.036 inchand a frequency of 50 cps. The valve shaUbevibrated half of the test period in the openposition and the other half of the test periodin the closed position. The valve shall remainin the seleots~ position. The valve shall be
operated throughout this test at the test cyclefrequency of footnotx+i table II. Upon com-pletion of this test, the valve shall be subjectedto the leakage testsof 4.6.3.2,4.6.3.3, and 4.6.3.4.There shall be no evidenca of malfunctioning,damage, loosening, or leakage of the valve orvalve parts, either during or as a result of thistest.
4.63 Th.mmzl mhf operation.. This testisapplicable only to valves with thermal reliefprovisions. With the valve closed, the pressureshall be slowly raised alternately on either side
10
.
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of the valve from 100 to 140 psi or to the crack-ing pressureof tho valve, whichever is the lCSSSr”,,
., This shall be repeated six time and each timethe thermal relief valve shall be observed to
.,,,,., operate successful y under this condition.
...-,, 4.6,6 Enuhwamw. The endurmme test shall,,. .,,, . be conducted in w.xordanco with tablo II.
4.6.7 Fuel resistance and low temperaturetest. The fuel resistance and low tempera.turotest shall be comluctcd in accordance withtable III.
4.6.8 Contaminated fuel endurance. Fuelcontaining contaminants, in the concentrationsspecified in Specification ‘M-IL-F-8615 shall bopumped through the valve. Tlm valve shall beoperated at the test cycle frequency specified infootnota 1of table II for 2,000 cycles of opma-tion, 1,000 cycles of which shall beat rated flowshown in table I and ‘1,000cycles a.t10 percentof rated flow. ‘J!he contaminant shall not berecirculated. A minimum quantity of 20 gal-lons of fuel shall be used for this test. Afterthis procedure, f he valve shall ~tisfy the r~
,,. . quirements of tho following tests:
(a) Valve body and shaft sealleakage ----------------- (4.6.3.1)
(c) Closed valve air suctionlmkag~----------------- (4.6.3.4)
(d) Functio~~al---------------- (4.6.10)
4.6.9 Accelerated corrosion. Without im- “,mersing the actuator, the valve>with open POt@shall be immersed in a solution consisting of2~2 per~nt by weight of sodium chloride in
distilled water: After immersion, the solutionshall be drained and the valve shall be heatedin an oven to a temperature of 125° to 135” Ffor a period of not less than 1 hour. The im-mersion and heating cycle shall be repeated 50times in wylch the first 25 cycles shall be withthe valve open and the last 25 cycles with thovalve closed. The valve shall not be operatedduring the immersion cyck-s, I~ediatelyafter completing the immersion cycl~ the valveshall be washed out with warm wabx to removeall salt accumulation% after which the valveshall be dried, wetted with fuel, and subjettedto the power and time of operation tat (4.6.10).Corrosion of any part of the valve to a degreewhich might affect performance dml.1be causefor rejection.
,,.
,,,,,
U
.,
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,.,,
. .,,, ,.
TABLE III. Fuel resistance and low lcrnperature test schedule
minimum vol toge testtwice in accordancewith 4.6.10, using 60-psi fuel shu toil pres-sure. The valve shalloperate within 10seconds. l’he powerrequirements of 4.6.10shall not be exceeded.Conduct applicablenormld 27- or 115-voltvoltage test in accord-ance with 4.6.10.Conduct Icakage testin accordance with4.6.3.1, using MIL-S-3136 type I fluid.
(d) Conduct leakage testin accordansc with4.6.3.2, using MIL-S-3136 type I fluid.
test 4.6.3.2,using MIL-S-3136 typeI
I During WVlod of soakhrg in tho test thdd, the vdw shall lW mnin-hdnerl In such R msnncr as to insure complete cent.net of all syntheticPurts with the Iluid m would ho expectd under service ,.onditious.
1Each period shsll foUowimmodkntsly aftw tho procodfng one in themdor noted.I During first hnlf ofsosk period, vnlveshd] he in f!lll ““open” PwdUon;
darirsesecond hslf ofsoak Porkod,11shall ha hdlYCkX-Cd.
4.6.10 ~WWi%07UJz.
4.6.10.1 DC operatwn. The valve shall booperated at 18,277and 30 volts dc rtgainsta fuclshutoff pressure of 60 psi. At no time shall thecurrent exceed 10 amperes for valve sizes
12
through 2 inches or 15 amperes for largerva.1vcs. The time of operation in cibher direc-tion shall not exceed 2 seconds rtt18 volts and1 second at 27 volts, nor shall tho time be lessthan ~2 second at 27 volts. The valve shall be
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,,,:, .,
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,,’ “,,,.. .
operated from closed to open a minimum of 5times at 27 volts at a shutoff pressure of 5 psibelow tho thermal relief cracking pressure ofthe volve.
The valve shall be tasted in both open andclosed positions. A vokage of 30V shall be ap-
. . plied simultaneously across both the open andclosed terminals of tho motor and maintaineduntil the valve body temperature has stabilized.The valve shall remain in the selected positionand the valvo body temperature shall not exce~d200° F. Any d:lmage LO the motor as a resultof this test slmll be cause for rejection.
4.6.10.2 AC operation. The valve shall becapable of operation at 107, 115, and 117.5voltsagainst a fuel shntoff pressure of 60 psi. Atno time sh~!llthe input power exceed 100 volt-nmpercs. The time of operation in either direc-tion shall not exeeed 2 seconds at 107 volts and1 second ut 115 volts. The valve shall be op-erated from closed to open a minimum of 5times M 115 volts at o shutoff pressure of 5 psibelow the thermal relief cracking pressure ofthe valve.
, .,.~:, The valve shall be tested in both open and
closed positions. A voltage of 117.5V shall beapplied simultaneously across both the openand closed terminals of the motor and main-tained until the valve body temperature hasstabilized. The valve shall remain in the se-lected position m-l the valve body temperatureshall not exceed 200” F. Any damage to themotor ns a result of this test shall be cause forrejection.
4.6.11 ~hlectric strength and kwiation re-uiutance.4.6.11.1 ~ielectrio ~trenjt~. While at room
temperature, 1,000volts (rms) 60 cycles for dc-operatecl valm; or 1,500volts (rms) 60 cyclesfor at-operated valves, shrill be applied for 1minute between windings and between wind-ings and frame. For this test, all windings
-- permanently connected together are to be ccm-sidered one winding. Capacitors may be dis-cmnected during this test. Capacitors tiall besubjected tQ 150 volts dc for 1 second. Themshall ‘be no voltage breakdown during or as aresult of the dielectric strength test.
4.6JL2 Inw.?dbn retitarwe. The insula-tion resistance shall be measured at 25” *5o C
‘+’
,,
MILV-’86O8A ‘“
betwean windings and the frame before and ,,’ ~after diekctric strength test. Insulation resist- ,,
ianca shall be not esa than 100 megobrns whenmeasured with a 00-volt dc megger.4.6.12 Radw interference. The mdio inter- ,
ference test shall be conducted in accordancewith Specification MI.PI-6181: -
4.613 ErwironmentaJ ted8.4.6.13.1 Eaplouion proof. The explosion
tes~ Procedure 111 of Specification MIL-E-5272, shall be conducted on the motor compart-ment and any other compartment of the valvecontaining z source of igni~ion. These shallwithstand and confine an explosion of gasolineand air mixture within each compartment andshall confino all sparks and flame within thecompartment in order to prevent ignition ofexplosive mixtures surrounding me valve as-sembly. These tests shall be made using eachof two mixtures of gasoline and air, such thatone mixture will result in maximum pressureand the other in maximum duration of flame.Each compartment shall be subjected to 25 ex-plosions of each mixture. The mixture sur- “rounding the valve shall be ignited a suhicientnumber of times to demonstrat.a that it isexplosive.
4.6XL2 &Zt qmzy. With the ports pluggedand the electric connector capped as in Serviqthe valve and actuator shall be subjected to atiO-hoursalt spray test conductad in accordancewith Federal Test Meth@ Standard No. 151.At the conclusion of the ‘~st, the valve shall bevisually inspected for evidence of corrosionafter which it shall meet the power and timeof operation test (4.6.10).
4.6.13.3 Sand and du#. With the portaplugged and the electric connector capped asin service, the valve shall be subjected to theSand and Dust tests, Procedure I, of SpecM-cation MIL-E-5272. At the end of this ~the valve shall be subjected to the power andtime of operation kt ‘(4.6.1O) &id the valve “”body and shaft seal leakage test (4.6.3.1).
4&l&4 Z%nguu. With ports plugged andthe electrical receptacle upped as in servi~the valve shall be subjected to the followingtest. At least five fungi shall be used in eachtest, one selected from each group shown intable V. In preparing tie spore suspension,
la
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BIIILV-8608A
distilled water (having a pH value between 6.8and 7.2) at 77° F, shall be prepared by steriliza-tion in convenient containers (approximately100 cc each). Approximately 10 cc of (he so]u-tion shall then be introduced directly into astuck culture of ono fungus and shaken vigor-ously so that a well sporulatcd suspension willresult without disturbing the ngar. This proc-essshall be repeated for each type fungus. Thesoparataspore suspension from tho fivo typrs offungi shall be mixed together in m atomizerto provide a composite suspension. The valveshall then be placed into a mold cl]amlmrmain-taining an internal tempwutl]ro of 86° F nnd arelative humidity of M pcrccnt, and sprnycdwith the suspensionof mixcd spores. The valveshall remain in the chwnlnw unclcr the a.bovcspecified conditions for 28 days. At fhe endof this time, it shall ho removed and subjectedto the power and timcof opt?mtiontest (4.6.10).4.6.13.5J?umia?ity. With ports plugged
and the electrical receptacle capped as in serv-ice, the valve shall be placed in a test chnmhi)rwhich is cnpable of being sealed, mndthe tem-perature and relative humidity raised to lCOOFand 95&5 percent, respective]y, during a 2-hour period. The source of heat for the cham-ber shall be so arranged that radiant heat sh~llnot fall upon the vrtlve. The valve shall remainin the chamber under the above conditions fora period of 6 hours. At the conclusion of the6-hour period, the bent shall be turned off.During the following ltihour period, the tem-perature must drop at a uniform rate with con-densation to 100° F’ or less. The cyc]c s]ml] berepeated a sui%cientnumber of times to extendthe total time of the test to 360 hours (15cycles). At the conclusion of the 360-hour pe-riod, the valve shall be soaked at – 67° 1? foro period of 2 hours, and whilo still zt –67° Fshall be subjected to the power and time ofoperation test (4.G.1O).Distilled or dcm inmd-ized water having a pII vduc of between 6.8and 7.2 at 77° F, shall be used to obtain thedesired humidity.
4.6.13.6 Burd pressure. With the valve inthe open position, llnd with one POrt Nw@,a fluid pressure of 180&2 psi shall be appliedfor n period of 1 minute. There shall be noevidence of distortion or other injury (o any
14
part of the valve. When the pressure is loweredto 60 psi there shall be no evidence of externalleakage from any portion of the valve.
tTABLE V. Fungus cullu?es 10 be used in the fungus led
[7SllA1334.2,ATCCGroup II. ( 9095Rhizopus nigricans or Aspcr- S.-.J, 32, ATCC 10404
{gillua Niger---------------- USDA TC~]5.4~47
Group 111.#
ATCC 6275Aspcrgiilus flavus or Aapcr-
{
ASD NO, 26, ATCCgillus tcrrcus --------------- 10836
1’QMD sZJ, ATCCGrouJ) Iv. 10G9OI’cnicillium lutwrn or l’enicil- cS])A 1~~~ 1, ATCClium ochro-chloron Pcnicil-
[9776
lium citrinum -------------- USI)A I:w.2, ATCC
Group V. 1(‘ 9112ATCC 9840
[
Mcrnnonidla cchinata or IhJ- A~97No. 371 Al’ccsurium moniliformc ---------
USDA 1004.1, ATCC10052
Culture dcalmmtion and sourca
USDA U.S. Department of Agriculture, lMtsviJle,Md.
ATCC American Type Culture Collection, George-town University, Washington, T).C.
PQMD Philadclphin Q.M. l)cpot,,,. 2800 S. 20thStreet, I’hiladelphia, Pa.
ASD Aeronautical Systcma Division, Wright-l’atkrson Air Force Base, Ohio.
S.x. J~r. W. B. Wustou, IliologicHl Laboratories,IIarvard 7Jnivcrsity, Cambridge, Mar%
4.6.13.7 21hmwmUy arwi inspectz’on. Thevalve sliall be di.sasscmbled and inspected.Thcro shall bo no evidence of detcriomtion,corrosion, or wear of any part of tl]o vulvo toa degree which might affect perf ormrmco.
4.7 Preservation, packaging, packing, andmarking. Preservation, packaging, pricking,and marking shall bo examined for conforma-nce wit h section 5.
~, ~}R~pARATION ~(_)R ~ELIVERy
5.1 Preservation. Unless otherwise spwi-thl, all valvo porls shrdl be sealed wi~h clo-
i
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...,.,,,...,,, ,
,.~+,.. ,
mres conforming to Specification KIL-C-5501and the valves shall be preserved in accordan~with method IId of Specification MI&P-116without the use of preservative c>mpound.
52 Packaging.5.2.1 ZeveZ A. Valves shall be packaged
in accordance with method IId of SpecificationMIL-P-116. Tho unit container ;hall be a reusable metal type.
52.2 Level (?. When this leve1 is required,packaging shall lx in accordance ~~it.hstandardcommercial practice.
5.3 Packing.5.3.1 Levels A, B, and C. V:dves shall be
packed in accordance with Spccil wation MIbP-7936. Tho level shall be as :;pecitied (see6$2). No rough-handling te:t.s will krequired.
5.4 Marking of shipmenb 1n addition toany special marking required b~ the contractor order, unit pac@gcs, intermedi~t~p~ckag%and shipping containcm shall be marked in ac-cordance with Standard MIL-STD-129.
5.4.1 Aqe control. The exterior shippingContainer and unit iind inkmncdiate packagesshall UISOlm marked in accordance with AN’ABulletin No. 438.
6. NOTES6.1 Intended use. The fuel shutoff valves
COVCIWI by this spccifimtion nro il~tcnded foruse \vitll nvintiou gwsolino nml jet fuels (J1’Aand ,11>- 5). These valves nrc no~ to bo usedfor flow mgul:it ion of fuel in the fuel system.
6.2 Ordering data. Procurement docu-ments should specify the following:
(a) Title, number, and. ~ate of this speci-fication.
,*
,...,,
MILV-8W3A :~~,
(b) Type and size of valve WUN (~ “.1.2) .
(c) Time mid lace for preproduction teafing (sea .3.1).
(d) Conditions applicable to itemsheld or .,,produced pending satisfactory com-pletion of the preproduction tesk
(e) Selection of applicable levels of Pack-aging and packing.
(f) Vol@g% frequency, and power re-quirements.
63 Definitions63.1 Va.Zve. Unless otherwise specified, the
word “vnlve” shall be construed to mv.an a com-plete assembly.
6.3.2 Cycle. A cycle of operation of thevalve shrdl be from full closed to full open andreturn to full closed, or from full opep to fullclosed and return to full open.
6.3.3 Operation. A valve operation is one-hnlf a cycle.
Notice: When (governmentdrawlnga, apeclflcaUona,or other data are used for any purpose other than inconnection WIth a detlnitely related Government PM-curtng operation, the United States Government the-by Incurs no resnonslbllity nor any obligation whatso-ever; and the fact that the Government maY haveformulated, furnished, or in any way supplied themid drawings, speritlcatious, or other data 1s not to beregarded by lmpllc! tlon or otherwise as in any mannerUcensing the holder or any other person or eorporatlon,or cenveylug any rlghta or pemniselon to manufacture,use, or SC1l uny patented Inrentlon that maY In a nyway be related thereto.
Cuatodian9: Preparing activity:Army-M O Air Force-AFSCNavy-WepaAir Force-AFSC Project No. 2915-W04
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are invited to submit comments to the government. Fold on lines on reverse side, s~ple in comer, and send to
preparing acti. ity. Comments submitted on this form do not constitute or imply authorization to waive any
portion of the referenced document(s) or to smend contractual requirements. Attach any pertinent data which
may be of use in improving this document. If there are additional papers, attach to form and place both in anenvelope addressed to preparing sctivity.
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DD %1 4 2 6 S/N 0102-014.1002REP LACCS EotrloN OF 8 JAN ee WHlc H MAY BE USEO
