1、l-a71INCH-POUNO IMIL-V-81940B30 August 1993SUPERSEDINGMIL-V-81940A31 JANUARY 1978MILITARY SPECIFICATIONVALVE, SAMPLING AND BLEED, HYORAULIC,TYPE II SYSTEMSThis specification is approved for use by alI Departmentsand Agencies of the Department of Defense.1. SCOPEI.1 . This specification covers hydrau
2、llc sampling and bleed valvessuitable for use in aircraft and mlssi le high pressure hydraulic systems.1.2 Classification. Hydraulic sampling and bleed valves are of class 3000 andto be operated with type 11 hydraulic fluid as defined in MIL-H-5440.2. APPLICABLE DOCUMENTS2.1 Government documents.2.1
3、.1 Specifications, standards, and handbcmks. The followlng specifications,standards. and handbooks form a oart of this document to the extent sDecifiedherein. Unless otherwise specified, the issues of these documents are those Iistedin the issue of the Department of Defense Index of Specifications a
4、nd Standards(0001SS) and supplement thereto, cited in the solicitation (see 6.2c).Beneficial comments (recommendations, additions, deletions) and any pertinentdata which may be of use in improving this document should be addressed to:Commanding Officer, Navai Air warfare Center Aircraft Division Lak
5、ehurst,Code SR3, Lakehurst, NJ 08733-5100, by using the Standardization OocumentImprovement Proposal (00 Form 1426) appearing at the end of this document orlby”letter.II a71 4C N/A FSC 1650TRIBUTION STATEMENT A. Approved for public release; distribution is unlimited.Provided by IHSNot for ResaleNo r
6、eproduction or networking permitted without license from IHS-,-,-SPECIFICATIONSFEDERALPPP-B-S66 -PPP-B-636 -PPP-B-676 -MILITARYMIL-B-117 -MIL-H-5440 -MIL-C-5501 -MIL-H-S606 -MIL-H-6083 -MIL-H-8775 -MIL-H-25475 -MIL-H-46170 -MIL-F-81836 -MIL-V-81940/l -MIL-H-83282 -STANDARDSMILITARYMIL-V-81940BBoxes,
7、 Folding, PaperboardBoxes, Shipping, FiberboardBoxes, SetupBags, Sleeve and TubingHydraulic Systems, Aircraft, Types Iand 11, Oesign and InstallationRequirements ForCaps and Plugs, Protective, Oust andMoisture SealHydraulic Fluid, Petroleum Base;Aircraft, Missile and OrdnanceHydraulic Fluid, Petrole
8、um 8ase, forPreservation and OperationHydraulic System Components, Aircraftand Mtssiies, General Specification ForHydraulic System, Missile, Design,Installation and Tests, GeneraIRequirements ForHydraulic Fluid, Rust Inhibited, Fire-Resistant, Synthetic Hydrocarbon 8aseFilter and Disposable Element,
9、 FluidPressure, Hydrauiic, 3 Micron AbsoluteValve, Sampling and Bleed, Hydraulic,Type 11 SystemsHydraulic Fluid, Fire Resistant, SyntheticHydrocarbon Base, Aircraftz Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-1-1 MIL-V-81940B, , .?,. . . . .,.-
10、-., .,I MI L-l U-l UU Lnglneerlng urawlng rracrlcesMIL-STD-105 - Sampling Procedures and Tables forInspection by AttributesMIL-STD-129 - Marking for Shipment and StorageMIL-STD-130 - Identification Marking of U.S. MtlitaryPropertyMIL-STD-280 - Definitions of Items Levels, ItemExchangeabiIity Models
11、and Related TermsMIL-STD-2073-1 - DOO Materiel Procedures for Developmentand Application of Packaging RequirementsMS21344 Fittings, Installation of Flared Tube,Straight Threaded Connectors, DesignStandard For(Unless otherwise indicated, copies of federal and miIitary specifications,standards, and ha
12、ndbooks are avaiIable from the 000SSP-Customer Service,Standardization Documents Order Desk, Building 40, 700 Robbins Avenue,a71 Philadelphia, PA 19111-5094.)2.2 Non-Government publications. The following document forms a part ofthis document to the extent specified herein. Unless otherwise specifie
13、d. theissues of the documents which are DOD adopted are those listed in the issue ofthe 00DISS cited In the solicitation. Unless otherwise specified, the issuesof documents not listed in the DOOISS are the issues of the documents cited inthe solicitation (see 6.2c).SOCIETY OF AUTOMOTIVE ENGINEERS, I
14、NC. (SAE)Ia71ARP 598 -AS 4059 -(Application for copiesEngineers, 400 CommonwealthAMERICAN SOCIETY FOR TESTINGASTM 03951 -Determination of Particulate Contamination inLiquids by the Particle Count MethodAerospace-cleanliness classification forhydraulic fluidsjhould be addressed to the Society of Auto
15、motive)rive, Marrendaie, PA 15096.)ANO MATERIALS (ASTM)Commercial Packaging3Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-V-81940B. .(ApplIcation for copies should be addressed to the American Society forTesting and Materials, 1916 Race Street,
16、 Philadelphia, PA 19103.)NATIONAL FLUID POWER ASSOCIATIONNFPA T2,9.6 R1 - Calibration Method for Liquid Automatic ParticleCounters Using Latex Spheres Second Edition(ApplIcatlon for copies should be addressed to the Nat!onal Fluid PowerAssociation, 3333 N. Mayfair Road, MiIwaukee, WI 53222.)(Non-Gov
17、ernment standards and other publications are normallY availablefrom the organizations that prepare or distribute the documents. Thesedocuments also may be avaiiable in or through Iibraries or other informationalservices.)2.3 Order of precedence. In the event of a conflict between the textof this spe
18、cification and the references cited herein (except for relatedassociated detail specifications, specification sheets or MS standards), thetext of this document shall take precedence. Nothing in this document,however, supersedes applicable laws and regulations unless a specific exemptionhas been obta
19、ined.3. REQUIREMENTS3.1 Specification sheet. The individual part requirements shall be asspecified herein and in accordance with the applicable specification sheet.In the event of conflict between the requirements of this specification andthe specification sheets, the requirements of the specificati
20、on sheets shalIgovern.3.2 Qualification. The valves furnished under this specification shalIbe products which are authorized by the qualifying activity for ltsting on theapplicable qualified products list at the time of award of contract (see 4.3and 6.4).3.3 Materials.3.3,1 Selection. Materials used
21、 shall be internally and externallyprotected against corrosion. Material selection shall be in accordance withMIL-H-8775 Type II components.3.3.2 Compatibility. The valve shall be constructed of materials thatwi1I not adversely affect or be affected by hydraulic fluid conforming toMIL-H-5606, MIL-H-
22、6083, MIL-H-83282 and the test fluids specified herein.4Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-V-81940B3.3.3 Fungi nutrients. Materials which are not nutrients for fungi shaIlbe used wherever possible. Where fungus-nutrient materials mus
23、t be used, theyshall be treated with a fungicidal agent.3.4 Design and construction.3.4.1 SamPlin9 and bleed valves. Sampling and bleed valves, forhydraul1 systems conforming to MIL-H-5440 for aircraft and MIL-H-25475 formissiIes shall be designed and constructed as specified herein and theapplicabl
24、e specification sheet MIL-v-81940/l.3.4.2 External loads. The valve shall be designed to withstand all theexternal loads. The valve shall be of such strength and rigidity as towithstand the wrench loads required for making tube connections. Theinstallation torque and tubing connection shalI be in ac
25、cordance with MS21344.3.4.3 Valve internal configuration. The internal configuration of thevalve shali be inspected and shall be such that the minimum restriction in theflow path shall be 500 microns. The manufacturer shall verify compliance withthis requirement by providing adequate detai1 drawings
26、 (see 6.3)3.5 Performance. The valve shall meet the performance requirements asspecified in 3.5.1 through 3.5.12.3.5.i Samplinq efficiency (normal systems). The valve shall be designedto operate with hydraulic fluids with a contamination level as specified in4.6.1.1. For each size range, the particl
27、e count from the sampling valveshall be equal to the particle count from the open port within 20%.3.5.2 Sampling efficiency (dirty systems). The valve shail be designedto operate with hydraulic fluids having a contamination level higher thannormal (class 12 and above contamination level per AS 4059)
28、 hydraulic fluidsystems and shal1 be able to meet the test requirements as specified in4.6.1.2.3.5.3 PrcOf pressure. The valve shall be designed to withstand a proofpressure of 6000 psi and shal1 not leak, malfunction, or permanently deformwhen tested in accordance with proof pressure test as specif
29、ied in 4,6.2.3.5.4 Leakage (uncapped). The valve shalI be designed to operate at 3000psi with no cap installed in the outlet port and shall meet the leakage testrequirements as specified in 4.6.3.3.5.5 Leakaqe (capped). The valve shal1 be designed to operate at 3000psi with cap installed in the outl
30、et port and shall be able to meet theleakage test requirements when tested in accordance with 4,6,4.a715Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MlL-V-El940B3.5.6 Valve ooeration. The valve shall be designed to operate at 3000psi continuously
31、for 2000 hours at 275F fluid and ambient temperature withoutmalfunction or leakage and shall meet the test requirements of 4.6.5.3.5.7 Low temperature operation. The valve shal1 be designed to operateat -70”F (maximum) hydraulic fluid and ambient temperature and shall be ableto pass the test require
32、ments as specified in 4.6.6.1.3.5.8 Hqh temperature operation. The valve shall beat 275F (maximum) hydraulic fluid and ambient temperatureor leakage. The valve shal1 meet the test requirements as4.6.6.2.3.5.9 Impulse. The valve shal1 be able to operate atof 150 percent of operating pressure with ini
33、tial rate of pressure rise to200,000 - 300,000 psi/see and shall meet the test requirements for the impulsetest (see 4.6.7).designed to operatewithout malfunctionspecified inthe peak pressure3.5.10 Vibration. The valve shall be designed to meet the vibration testrequirements as specified in 4.6.8.3.
34、5.12 6urst pressure. The valve shall be designed to meet the burstpressure of 12,000 PSI and shall show no leakage when held at that pressurefor 2 minutes.3.6 Identlficatton of product.3.6.1 Markings. Each valve shall be clearly and permanently identifiedby steel stamptng or by a permanently attache
35、d nameplate conforming toMIL-STD-130. The following information shal1 be provided.VALVE, SAMPLING ANO BLEEOM81940/ (Insert slash number of specification sheetand designation for fitting end)Manufacturer part numberManufacturer stock number or serial numberManufacturer nameDesign activity CAGE CODE/p
36、art number3.7 Part numberinq of !nterchanqeable parts. All parts having the samedesgn activlty CAGE CODE (Contracting and Government Entlty) and part numbershall be Interchangeable as defined in MIL-STD-280. The item identificationand part number requirements of MIL-STO-100 shal1 govern the design a
37、ctivitypart numbers and changes thereto. The manufacturers part number and drawingnumber shal1 be the same.3.8 140rkmanshiD. The workmanship and finish shall be of sufficientlyhigh grade to ensure satisfactory operation, rellability, and durabilityconsistent with the application and storage Iife req
38、uirements of the valve.- 1aProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-a71MIL-V-B1940B4. QUALITY ASSURANCE PROVISIONS4.1 ResDonslbility for inspection. Unless otherwise specified in thecontract or purchase order, the contractor is responsible for
39、 the performanceof all inspection requirements (examinations and tests) as specified herein.Excegt as otherwise 5DeCified in the contract or Durchase order, the contractormay use his own or any other faci1ities suitable for the performance of theinspection requirements specified herein, unless disap
40、proved by the Government.The Government reserves the right to perform any of the inspections set forthIn this specification where such inspections are deemed necessary to ensuresupplies and services conform to prescribed requirements.4.1.1 Responsibility for compliance. The contractor(s) shall meet
41、allthe requirements of Sections 3 and 5. The inspection set forth in thisspecification shall become a part of the contractors overall inspectionsystem or quality program. The absence of any inspection requirements in thespecification shall not relieve the contractor of the responsibility ofensuring
42、that al1 products or supplies submitted to the Government foracceptance comply with al1 the requirements of the contract. Samplinginspection, as part of manufacturing operations, is an acceptable practice toascertain conformance to requirements, however, this does not authorizesubmission of known de
43、fective material, either indicated or actual, nor doesit commit the Government to accept defective material (see 6.3):4.2 Classification of inspections. The inspection requirements specifiedherein are classified as foliows:a. Qualification inspection (4.3).b. Quality conformance inspection (4.4).4.3
44、 Qualification inspection. The qualification inspection shall consistof all the examinations and tests specified in table I (listed sequencemandatory).4.3.1 Qualification samples. The qualification sample shall consistof two specimens of each valve. The specimens shal1 be assembled of partswhich con
45、form to manufacturers drawings/designs activity drawing. Samplesshall be forwarded to a test facility set forth in the letter of authorizationto submit samples (see 6.4). Samples shall be clearly identified by securelyattached durable tags with the following information:Sample submitted by (name) (d
46、ate) for qualification inspection inaccordance with the requirements of MIL-V-81940 (latest revision)and number under authorization (reference authorizing letter andnumber, see 6.4).Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-. .MIL-V-819408TABLE
47、 I. Qualification inspectionTest Testin Test description Requirements requirementsequence paragraph nos. paragraph nos.Examination of product 3.4.3 4.4.2: Valve cleanliness 5.1.134.7.1Sampling efficiency 3.5.2 4.6.1.1(normal system)4 Sampling efficiency 3.5.3 4.6.1.2(dirty system)5 Proof pressure 3.
48、5.464.6.2Leakage (uncapped) 3.5.574.6.3Leakage (capped) 3.5.684.6.4Valve operation 3.5.794.6.5Low temperature operation 3.5.8104.6.6.1High temperature operation 3.5.9 4.6.6.211 Impulse 3.5.10124.6.7Vibration 3.5.11134.6.8Burst pressure 3.5.12 4.6.94.3.2 Test data. The manufacturer shal1 provide test
49、 data showing thatadequate clearance of moving parts is provided using the worst possiblecombination of tolerances. The room temperature reference point shalI be 70”F(see 6.3).4.3.3 Retention of qualification. The retention of qualification shal1consist of verification every two years to determine compliance of the listeditems with the requirements of this specification. Verification shall be bymanufacturers certification
