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 4140-01-338-1147
NSN 5920-00-466-3950
NSN 4140-01-160-1742
NSN 5915-01-453-9252
NSN 2925-01-327-3069
NSN 6135-01-654-6147
NSN 5925-01-164-9681
NSN 6145-00-600-6359
NSN 6620-01-353-9224
NSN 6150-00-738-4316
NSN 5996-01-212-1132
NSN 6110-01-393-9187