1、 r- MIL-C-832bOA 49 m 9999906 0257268 5 m f MIL-C-83260A (USAF) I MILITARY SPECIFICATION COUPUR, HYDRANT VALVE GRU-l6/E 1. SCOPE 18 May 1972 S UPERSE D ING MIL-C-83260 (USAF) 3 June 1970 1.1 Cla-Val model 352-AF hydrant adapter and liquid level control valve, as manu- factured by the Cla-Val Company
2、, Newport Beach, California 92663. 2. APPLICABLE DOCUMENTS This specification covers a hydrant valve coupler which will mate with the 2.1 bids or request for proposal, form a part of this specification to the extent spec if ied here in : The following documents, of the issue in effect on date of inv
3、itation for SPECIFICATIONS Federal QQ-A-60 1 QQ-W-42 3 PPP-B-601 PPP-T-45 Military MIL-P-116 MIL-P-5315 MIL-W- 5424 MIL-G-5572 MIL-T-5624 MIL-A-8625 MIL-P-1766 7 MIL-H-26894 Aluminum-Alloy Sand Castings Wire, Steel, Corrosion-Resisting Box, Wood, Cleated-Plywood Tape, Gummed, Paper, Reinforced and P
4、lain, for Sealing and Securing Preservation, Methods of Packing, Preformed, Hydrocar-on Fue Resistant Wire Rope, Steel (Corrosion-Resisting), Flexible, Preformed (For Aeronautical Use) Gasoline, Aviation, Grades 80/87, 100/130, 115/145 Turbine Fuel, Aviation, Grades JP-4 and JP-5 Anodic Coatings, Fo
5、r Aluminum and Aluminum Alloys Paper, Wrapping, Chemically Neutral (Non-Corrosive) Hose Assembly, Rubber, Gasoline, Refueling, Low Temperature FSC 4930 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-._ MIL-C-B3260A q9 W 7977906 0257269 7 W MIL-C-832
6、60A(USAF) STANDARDS Military MIL-STD-100 MIL-STD-129 MIL-STD-130 MIL-STD-143 MIL-STD-2 76 MIL-STD-470 MIL-STD-810 MIL-STD-831 MIL-STD-889 MIL-STD- 1186 Engineering Drawing Practices Marking for Shipment and Storage Identification Marking of US Military Property Standards and Specifications, Order of
7、 Precedence for the Selection of Impregnation of Porous Nonferrous Metal Castings Maintainability Program Requirements (For Systems and Equipments) Environmental Test Methods Test Reports, Preparation of Dissimilar Metals Cushioning, Anchoring, Bracing, Blocking and Waterproofing, with Appropriate T
8、est Methods (Copies of specifications, standards, drawings, and publications required by suppliers in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer.) 2.2 Other publication, fication to the extent specified here
9、in. Unless otherwise indicated, the issue in effect on date of invitation for bids or request for proposal shall apply. The following document forms a part of this speci- National Bureau of Standards Handbook H28 Screw-Thread Standards for Federal Services (Application for copies should be addressed
10、 to the Superintendent of Documents, Government Printing Office, Washington DC 20402 .) 3. REQUIREMENTS 3.1 Preproduction. This specification makes provisions for preproduction testing. 3.2 Selection of standards and specifications. Standards and specifications for necessary comodities and services
11、not specified herein shall be selected in accordance with MIL-STD-143. 3.3 Materials 3.3.1 Protective treatment. When materials are used in the construction of the coupler that are subject to deterioration when exposed to climatic and 2 Provided by IHSNot for ResaleNo reproduction or networking perm
12、itted without license from IHS-,-,-I environmental conditions likely to occur during service usage, they shall be protected against such deterioration in a manner that will in no way prevent compliance with the performance requirements of this specification. The use of any protective coating that wi
13、ll crack, chip, or scale with use, age, or extremes of climatic and environmental conditions shall be avoided. 3.3.2 Fungusproof materials. Materials which are not nutrients for fungi shall be used to the greatest practicable extent. Where materials that are nutrients for fungi must be used, such ma
14、terials shall be treated with a fungicidal agent acceptable to the procuring activity. 3.3;3 Metals. Unless otherwise specified herein, metals shall be of the corrosion-resistant type or treated to resist corrosion due to fuels, salt spray, or atmospheric conditions likely to be met in storage or no
15、rmal service. All components that come into contact with the fuel shall be fabricated of aluminum alloy suitable for the application or 300 series stainless steel. 3.3.3.1 Dissimilar metals. Unless protected against electrolytic corrosion, dissimilar metals shall not be used in intimate contact with
16、 each other. Dissimilar metals are defined in MIL-STD-889. 3.3.3.2 Bonding. Metal parts shall be specifically bonded together to prevent the possibility of sparking. 3.3.3.3 Impregnation of castings. Aluminum castings may be impregnated in accordance with MIL-STD-276 to prevent minor weeping. 3.3.4
17、Elastomers. Elastomers used in the coupler which come into contact with fuel shall be compatible with fuels conforming to MIL-G-5572 and MIL-T-5624. 3.4 Design and construction. normally closed type designed and coristructed for connection to and operation of the Cla-Val Company model 352-A? adapter
18、 and liquid level control valve provided on the Pritchard hydrant refueling system. The coupler body shall be an aluminum-alloy casting conforming to QQ-A-601, compos it ion 356, temper T-6. Springs shall be made of stainless-steel wire conforming to QQ-W-423. The coupler shall be held in place by s
19、tainless-steel balls of the coupler in the groove provided on the adapter. The coupler shall be of the spring-loaded, 3.4.1 Rotation. The coupler shall be so designed that it can be rotated 360 degrees around the vertical axis of the adapter when the coupler and adapter are connected both with and w
20、ithout internal pressures up to 150 psig. The coupler shall have a 4-8 NPT internal threaded end at 90 degrees to the centerline of the end which connects to the adapter. t 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL- C - 8 32 6 OA (US AP)
21、 3.4.2 Durability. parts will work loose in service, or while being moved between service -operations, and to withstand the strains, jars, vibrations, and other con- ditions incident to shipping, storage, and service. The coupler shall be so designed and constructed that no 3.4.3 Reliability. The co
22、upler shall have a mean-time-between-failure (MTBF) of 344 cycles with a minimum-reliability of .997 for 1 cycle per mission at a confidence factor of .90. (See 6.4.1 and 6.4.2.) 3.4.4 Maintainability. The maintainability design criteria of MIL-STD-470 shall be applied in the design and construction
23、 of the coupler. 3.4.5 Foolproofness. Where improper installation of an item could cause malfunction of the item or the equipment in which it is installed, an unsymmetrical mounting means shall be provided, where practical. The mounting shall allow the item to be installed only in its proper operati
24、ng position. If an unsymmetrical mounting means is not practical, the item shall be so mounted that its proper operating position can be readily and visibly determined by service maintenance personnel. 3.4.6 Control lever. The coupler and adapter poppet valves shall be actuated by a control lever on
25、 the hydrant coupler. The control lever shall be inter- locked such that during connection of the coupler with the adapter the control lever can only be operated when the coupler and adapter are correctly in place. To prevent accidental fuel leakage, the hydrant coupler shall be designed to prevent
26、it from being detached from the hydrant unless the valve lever is. in the closed position (see 3.10). In addition, after it is detached it shall not be possible to move the valve lever to the open position. 3.4.7 Gasket. between the coupler and adapter. The gasket shall be designed to assure its ret
27、ention to the coupler. A gasket shall be provided which will effect a leaktight seal 3.4.8 O-rings. O-rings shall be in accordance with MIL-P-5315. If an O-ring gasket is used to seal the coupler to the adapter, it shall be in accordance with MIL-P-5315, except as follows: a. The amount of volume ch
28、ange shall not exceed 14 percent b. c. d. The tensile strength shallbe a minimum of 1,200 psi at manufacture The ultimate elongation shall be a minimum of 250 percent at manufacture The shore A hardness shall be 70 23 durometers at manufacture. 4 Provided by IHSNot for ResaleNo reproduction or netwo
29、rking permitted without license from IHS-,-,-MIL-C-832bOA LI7 = 7777906 0257272 7 MIL-C - 8 32 6 OA (USAI?) 3.4.9 Pressure sensing provisions. provided in the portion of the coupler which is parallel to the poppet valve and the side farthest from the poppet valve. A 3/4-14 NPT external thread square
30、 or hexagon head aluminum-alloy plug shall be provided for sealing this connect ion. A 3/4-14 NET. internal connection shall be 3.4.10 Dust plu%. weather shall be provided to protect the coupler poppet valve, sealing gasket, and sleeve which fits over the adapter. The dust plug shall be provided wit
31、h a security wire rope of 1116-inch diameter in accordance with MIL-W-5424, except with a clear nylon jacket. The wire rope shall be attached to the coupler and dust plug. An elastomeric dust plug resistant to fuel, water, and 3.4.11 Handling provisions. connecting, and disconnecting the hydrant cou
32、pler when a 4-inch hose is attached. Two provisions oriented approximately 180 degrees apart shall be included for a persons foot to be used in assisting the attachment of the coupler to the adapter. 3.4.12 Bumper. A replaceable fuel-, water-, weather-, and abrasion-resistant elastomeric bumper shal
33、l be provided to protect the leading edges of the coupler that fit over the adapter during handling, storage, and connection of the hydrant coupler. The bumper shall also protect the leading edges of the adapter during connection and disconnection of the coupler. 3.4.13 Disconnect swivel assembly. U
34、nless otherwise specified (see 6.2), a disconnect swivel assembly shall be provided on the outlet of the hydrant coupling to improve handling of the 4-inch hose during servicing operations. The swivel shall be provided with a male 4-inch NPT on one end and a 4-inch female NET on the other end. The s
35、wivel shall be provided with internal wrench lugs to permit screwing the male half to the hydrant coupling. The design of the swivel shall include ball bearings, O-ring seals, and a locking ring to provide for a 360-degree rotation on the horizontal axis. The swivel shall be provided with an enclose
36、d lockpin, lockspring, and setscrew. They shall be so arranged that after both halves of the swivel are connected, the lockpin release will be made only after the setscrew is loosened. The swivel shall meet all the applicable tests specified in 4.4.3. Handles shall be provided to assist in handling,
37、 3.4.14 Handtools. The coupler shall be designed and constructed in a manner that will allow general maintenance, assembly, and disassembly to be performed to the maximum practical extent with the use of common handtools. 3.4.15 Lubricants. Liquid lubricants or lubricants soluble in fuel shall not b
38、e used. Wherever practicable, lubricated-for-life components not requiring servicing shall be used. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-83ibOA 49 7999906 0257273 7 - MIL-C-832604 (USAF) 3.5 Perf ormance . 3.5.1 Environmental condi
39、tions. The coupler shall be capable of operating under and withstanding the following environmental conditions : 3.5.1.1 Storage temperatures. The coupler shall not be damaged by storage in ambient temperatures ranging from -80 to f160F for not less than 50 hours. 3.5.1.2 Operating temper3tures. The
40、 coupler shall perform as specified herein at ambient temperatures between -65O and +125OF. 3.5.1.3 Humidity. The coupler shall not be damaged by operation or storage in any relative humidity up to and including 100 percent, including conditions wherein condensation takes place in the form of water
41、and frost. 3.5.1.4 Fungus. growth such as encountered in tropical and subtropical climates . The coupler shall not be damaged by exposure to moist fungus 3.5.1.5 Salt atmosphere. storage in an atmosphere containing salt-laden moisture, such as encountered near bodies of salt water and in transportat
42、ion on shipboard. The coupler shall not be damaged by operation or 3.5.1.6 Sand and dust. storage in an atmosphere containing sand and dust particles as encountered in desert areas. With the threaded end sealed and dust plug in place, sand and dust shall not enter the coupler. The coupler shall not
43、be damaged by operation or 3.5.1.7 Rain. The coupler shall not be damaged by operation or storage in rainfall as encountered in any locale. The coupler shall not have areas that could trap and retain water from rainfalls in either the stored or operating configuration. 3.5.2 Poppet valve actuation.
44、The control lever shall permit simultaneous opening of the coupler poppet valve and adapter poppet valve when there is 16 inches of mercury to 150 psig on the inlet side of the adapter poppet valve. The force required to open the poppet valves shall not exceed 130 foot-pounds when the inlet side pre
45、ssure is 150 psig. No damage or degradation shall occur to the adapter poppet valve, the hydrant coupler poppet valve, or actuating me chan ism. 3.5.3 Poppet valve leakage. while being subjected to a 150-psig internal pressure, the poppet valve leakage shall not exceed 10 milliliters of fuel. Upon d
46、isengagement of the coupler from the adapter 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-83260A 47 W 7777906 0257274 O W MIL-C-83260A (USAI?) 3.5.4 Pressure loss. The pressure loss across the adapter and coupler with the poppet valves in
47、the full-open position shall not exceed 7.5 psi using grade JP-4 fuel in accordance with MIL-T-5624 at a temperature of +50 to 60F and a flow rate of 600 gpm. 3.5.5 Hydrostatic pressure. The coupler, when connected to the adapter with the poppet valves open, shall be designed for an operating pressu
48、re of 350 psig. The coupler shall be capable of withstanding a hydrostatic test pressure of 425 psig for 5 minutes with no evidence of weakness, impending failure, or leakage. The coupler poppet valve shall be capable of withstanding a hydrostatic test pressure of 200 psig on the inlet (adapter side
49、) of the poppet valve for 5 minutes without leakage or impending failure. 3.5.6 Negative pressure. valves open, the coupler shall be capable of losing not more than 5 inches of mercury in 4 hours when the initial negative pressure is 20 inches of mercury below atmospheric pressure. When connected to the adapter with the poppet 3.5.7 Drop resistance. The coupler shall be capable of withstanding being dropped a distance of 4 feet with random attitu
