1、AMSC N/A FSC 4820 MS28884F 2 April 2009 SUPERSEDING MS28884E 10 January 1977 DETAIL SPECIFICATION SHEET VALVE, FUEL CHECK, LOW PRESSURE, FLARED TUBE CONNECTION This specification is approved for use by all Departments and Agencies of the Department of Defense. The requirements for acquiring the prod
2、uct described herein shall consist of this specification sheet and MIL-V-7899, “Valves, Check, Aircraft Fuel System”. FIGURE 1. Check valve. INCH-POUND Inactive for new design after 15 October 1998. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MS2
3、8884F 2 NOTES: 1. Both ends in accordance with SAE AS4395, “Fitting End, Flared, Tube Connection, Design Standard”, style E for applicable tube size, except hex. 2. Dimensions are in inches. Millimeters are given for general information only. 3. Tolerances for B dimension are as shown below: 4. The
4、marking “hinge” is applicable only to swing type check valves. 5. Remove all burrs and break sharp edges (.016 inch (.406 mm) maximum). 6. Referenced documents shall be of the issue in effect on date of invitation for bid. 7. For design features, this standard takes precedence over procurement docum
5、ents referenced herein. 8. Unless otherwise noted, tolerances are .010 inch ( .254 mm). FIGURE 1. Check valve - Continued. Tubing O.D. (nominal) A .031 inch (.787 mm) B (for tolerances see note 3) C min D dia max Dash number size Inch mm Inch mm Inch mm Inch mm Inch mm -4 .250 6.35 1.563 39.700 1.06
6、3 27.000 .125 3.175 1.066 27.076 -6 .375 9.525 1.563 39.700 1.063 27.000 .125 3.175 1.066 27.076 -8 .500 12.70 1.674 42.520 1.187 30.150 .125 3.175 1.190 30.226 -10 .625 15.875 1.782 45.263 1.187 30.150 .250 6.35 1.253 31.826 -12 .750 19.050 2.063 52.400 1.500 38.100 .250 6.35 1.503 38.176 -16 1.000
7、 25.40 2.375 60.325 1.812 46.025 .250 6.35 1.820 46.228 -20 1.250 31.75 2.688 68.275 2.500 63.500 .312 7.925 2.508 63.703 -24 1.500 38.10 3.063 77.800 2.750 69.850 .375 9.525 2.758 70.053 -32 2.000 50.80 3.813 96.850 3.125 79.375 .312 7.925 3.500 88.900 B (tolerance) B (tolerance) Dash number size I
8、nch mm -4, -6, -8,-10, -12 +.003 -.006 (+.076) (-.152) -16, -20, -24 +.008 -.016 (+.203) (-.406) -32 .010 ( .254) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MS28884F 3 TABLE I. Valve classification. REQUIREMENTS Intended use. These low pressure
9、check valves are suitable for use with hydrocarbon fuels, fuel vapors, and air. Materials. Materials shall comply to requirements listed in the procurement specification, MIL-V-7899. Finish. Finish shall comply to requirements listed in the procurement specification, MIL-V-7899. Qualification. Check
10、 valves furnished under this specification sheet shall be products which are qualified for listing on Qualified Products List, QPL-7899. An online listing of products qualified to this specification may be found in the Qualified Products Database (QPD) at http:/assist.daps.dla.mil/quicksearch/ or ht
11、tp:/assist.daps.dla.mil . Locking of parts. Threaded parts shall be locked or safe-tied in accordance with National Aerospace Standard NASM 33540, “Safety Wiring, Safety Cabling, Cotter Pinning, General Practices for”. Safety cable is allowed as an alternate to safety wire. Self-locking nuts shall n
12、ot be used where loosening or disengagement could result 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 informatio
13、n should contain at least the following: (1) Valve, Check. (2) MS part number. (3) Manufacturers part number. (4) Manufacturers name or trade mark. Valve characteristic: See figure 1. Valve classification: See table I. High temperature Class Low temperature fuel and ambient Fuel Ambient A -55C (-67F
14、) 57C (135F) 71C (160F) B -55C (-67F) 94C (200F) 177C (350F) C -55C (-67F) 150C (300F) 315C (600F) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MS28884F 4 Part or Identifying Number (PIN). The PIN is as follows: MS28884 A - 32 Dash number Class le
15、tter Specification Reference documents. This document references the following: MIL-V-7899, “Valves, Check, Aircraft Fuel System”. MIL-STD-130, “Identification Marking of U.S. Military Property”. NASM 33540, “Safety Wiring, Safety Cabling, Cotter Pinning, General Practices for”. SAE AS4395, “Fitting
16、 End, Flared, Tube Connection, Design Standard”. Changes from previous issue: Marginal notations are not used in this revision to identify changes with respect to the previous issue due to the extent of the changes. Custodians: Preparing activity: Army AV DLA - CC Navy - AS Air Force - 99 DLA - CC (
17、Project 4820-2009-013) Reviewer activities: Army CR4, MI Air 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:/assist.daps.dla.mil/quicksearch/ or http:/www.assist.daps.dla.mil . Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
