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 5960-00-512-9121
NSN 5920-00-815-5599
NSN 5950-01-561-8557
NSN 5998-01-476-7582
NSN 5990-01-068-1651
NSN 4140-00-116-1022
NSN 5965-00-359-9769
NSN 5975-01-287-0057
NSN 5975-00-580-0434
NSN 6110-01-164-4332
NSN 5975-01-308-6543
NSN 6130-01-109-1644