Underwater life support iaw navsea instruction 10560.2b
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 6650-00-050-0476
NSN 6220-01-332-1395
NSN 5930-01-512-5754
NSN 7035-01-104-5446
NSN 5835-00-140-8646
NSN 5855-01-591-7998
NSN 6650-01-441-3624
NSN 6650-01-528-6563
NSN 6320-01-473-3848
NSN 7035-01-364-0286
NSN 5920-00-753-5113
NSN 6145-01-472-9227