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 5935-01-367-8557
NSN 6135-01-010-0891
NSN 6610-01-490-5168
NSN 5950-01-566-6245
NSN 6685-01-462-5090
NSN 5920-00-171-2347
NSN 6650-01-041-9846
NSN 5915-01-268-3257
NSN 4140-01-258-9526
NSN 6650-00-754-2276
NSN 5920-01-031-7360
NSN 7035-01-601-4051