1、AMSC N/A FSC 4820 INCH-POUND MS21430B 9 February 2009 SUPERSEDING MS21430A 6 December 1977 DETAIL SPECIFICATION SHEET VALVE, CHECK, FUEL AND AIR, POPPET TYPE, ZERO, LEAK This specification is approved for use by all Departments and Agencies of the Department of Defense. The requirements for acquirin
2、g the product described herein shall consist of this specification sheet and MIL-V-7899, “Valve, Check, Aircraft Fuel System”. FIGURE 1. Check valve. Inactive for new design after 15 October 1998. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MS214
3、30B 2 NOTES: 1. Dimensions are in inches. Millimeters are given for general information only. 2. Style 1 - Both ends in accordance with SAE AS4395, Style E, except hex. 3. Style 2 - Inlet end in accordance with SAE AS4396, Style E, except hex, and outlet end in accordance with SAE AS4395, Style E, e
4、xcept hex. 4. Remove all burrs and break sharp edges (.016 inch (.406 mm) maximum). 5. Referenced documents shall be of the issue in effect on date of invitation for bid. 6. Unless otherwise noted, tolerances are .010 inch ( .254 mm). FIGURE 1. Check valve - Continued. TABLE I. Valve Classification.
5、 Tubing O.D. (nominal) A .030 inch (.762 mm) B .015 inch (.381 mm) C min D dia max Dash number size Inch mm Inch mm Inch mm Inch mm Inch mm -4 .250 6.35 1.34 34.036 1.000 25.40 .215 5.461 1.005 25.527-6 .375 9.525 1.50 38.10 1.062 26.975 .215 5.461 1.065 27.051-8 .500 12.70 1.56 39.624 1.250 31.75 .
6、265 6.731 1.255 31.877-10 .625 15.875 1.56 39.624 1.250 31.75 .265 6.731 1.255 31.877-12 .750 19.050 2.06 52.324 1.500 38.10 .265 6.731 1.505 38.227-16 1.000 25.40 2.37 60.198 1.875 47.625 .275 6.985 1.875 47.625-20 1.250 31.75 2.69 68.326 2.500 63.5 .325 8.255 2.505 63.627-24 1.500 38.10 3.05 77.47
7、0 2.750 69.85 .395 10.033 2.755 69.977-32 2.000 50.80 3.80 96.52 3.125 79.375 .395 10.033 3.500 88.9 High temperature Class Low temperature fuel and ambient Fuel Ambient A -55C (-67F) 57C (135F) 71C (160F) B -55C (-67F) 94C (200F) 177C (350F) C -55C (-67F) 150C (300F) 315C (600F) Provided by IHSNot
8、for ResaleNo reproduction or networking permitted without license from IHS-,-,-MS21430B 3 REQUIREMENTS Intended use. These low pressure check valves are suitable for use with hydrocarbon fuels, fuel vapors, and air. Materials. Materials shall comply to requirements listed in the procurement specific
9、ation, MIL-V-7899. Finish. Finish shall comply to requirements listed in the procurement specification, MIL-V-7899. Qualification. Check valves furnished under this specification shall be products which are qualified for listing on qualified products list QPL-7899. Locking of parts. Threaded parts s
10、hall be locked or safe-tied in accordance with National Aerospace Standard NASM 33540, “General Practices for Safety Wiring, Safety Cabling, and Cotter Pinning”. Safety cable is allowed as an alternate to safety wire. Self-locking nuts shall not be used where loosening or disengagement could result
11、in the nut or other parts entering the fuel system. The use of lockwashers or staking is prohibited. Marking. The valve assembly shall be marked in accordance with MIL-STD-130, “Identification Marking of U.S. Military Property”. The information should contain at least the following: (1) Valve, Check
12、. (2) MS part number . (3) Manufacturers part number. (4) Manufacturers name or trade mark. Valve characteristic: See figure 1. Valve classification: See table I. Part or Identifying Number (PIN). The PIN is as follows: MS21430 A 1 - 24 Dash number Style number Class letter Specification Note: MIL-V
13、-7899, “Valve, Check, Aircraft Fuel System”, is the procurement specification. Reference documents. This document references the following: MIL-V-7899, “Valve, Check, Aircraft Fuel System”. MIL-STD-130, “Identification Marking of U.S. Military Property”. NASM 33540, “Safety Wiring, Safety Cabling, f
14、or Cotter Pinning, General Practices for”. SAE AS4395, “Fitting End, Flared, Tube Connection, Design Standard”. SAE AS4396, “Fitting End, Bulkhead, Flared, Tube Connection, Design Standard”. Changes from previous issue: Marginal notations are not used in this revision to identify changes with respec
15、t to the previous issue due to the extent of the changes. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MS21430B 4 Custodians: Preparing activity: Army AV DLA - CC Navy - AS Air Force - 99 (Project 4820-2008-006) Reviewer activities: Army CR4, MI A
16、ir Force - 71 NOTE: The activities listed above were interested in this document as of the date of this document. Since organizations and responsibilities can change, you should verify the currency of the information above using the ASSIST Online database at http:/www.assist.daps.dla.mil. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
