A valve permitting flow in one direction only. It does not have a stem, except when equipped with a lever and weight and has no pressure adjustment. It may be inline or cartridge (manifold) design.
NSN 4140-01-479-4257
NSN 6240-01-242-9138
NSN 6610-01-134-4516
NSN 5935-01-344-6170
NSN 6220-01-382-0920
NSN 5855-00-832-9341
NSN 6105-01-343-6645
NSN 6240-01-398-0646
NSN 6220-00-937-4721
NSN 5998-01-243-6122
NSN 5985-01-308-9312
NSN 6320-00-593-0379