MS29521G
REQUIREMENTS
Intended use. These swing check, fuel valve elements are suitable for use with hydrocarbon fuels, fuel vapors, and air and may be used in check valves MS21430, MS28882, and MS28884.
Requirements. The valve element, when mounted to a test fixture and discharging into an open tank, shall achieve the following performance:
(1) Opening and closing pressure per MIL-V-7899.
(2) Pressure drop at rated flow shall be less than 45 inches water. (3) Leakage: -32 and smaller - 0.5 cc per minute (max).
-40 and larger sizes - 1.0 cc per minute (max).
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. Disk, 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 https://assist.daps.dla.mil/quicksearch/ or https://assist.daps.dla.mil .
Marking.
(1) Color identification: The component shall be color coded to indicate fuel use by means of a red color per MIL-F-8615, "Fuel System Components: General Specification For".
(2) Assembly date mark: The valve assembly shall be date marked, packaged, and stored per, SAE ARP5316 , "Storage of Elastomer Seals and Seal Assemblies Which Include an Elastomer Element Prior to Hardware Assembly".
Valve characteristic: See figure 1.
Part or Identifying Number (PIN). The PIN is as follows:
MS29521 - 12A
Dash number
Specification sheet number
4
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