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 5920-01-501-5593
NSN 6135-01-230-4399
NSN 6135-01-382-1980
NSN 6130-01-190-3332
NSN 6130-01-192-4171
NSN 5999-01-222-0389
NSN 5925-00-348-3591
NSN 6240-01-640-9241
NSN 5975-01-018-8892
NSN 5915-00-448-4149
NSN 2925-00-005-1618
NSN 6650-01-437-6279