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 6150-00-312-2164
NSN 5910-00-613-6756
NSN 5945-01-478-1172
NSN 5915-01-557-5332
NSN 5925-01-454-8164
NSN 5990-00-145-1187
NSN 5975-00-964-4510
NSN 6645-01-074-8024
NSN 6620-01-158-5111
NSN 5950-01-081-6941
NSN 5965-00-436-2226
NSN 5920-01-469-3058