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 5925-00-589-8989
NSN 6130-01-453-5331
NSN 7035-01-451-6421
NSN 5895-00-920-3703
NSN 6150-01-255-4047
NSN 5945-01-389-4073
NSN 6105-01-263-5304
NSN 6650-01-521-7872
NSN 6145-00-054-8957
NSN 6135-01-265-1384
NSN 5930-01-352-5428
NSN 6240-00-842-2887