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.
Classification: Check valves of copper having a pressure rating of 850 kpa or over
NSN 5950-01-502-8219
NSN 6620-01-089-4416
NSN 5895-01-243-6922
NSN 5999-01-065-8543
NSN 5905-01-485-8820
NSN 5985-01-154-6359
NSN 4140-01-579-5516
NSN 5920-00-161-4564
NSN 5930-00-332-9031
NSN 2925-01-027-1293
NSN 5950-01-281-2763
NSN 5990-01-434-3469