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 5895-01-185-5408
NSN 6110-00-941-3341
NSN 5935-00-449-2805
NSN 5935-01-062-0705
NSN 6650-01-386-5787
NSN 6135-00-369-2368
NSN 6320-01-618-7800
NSN 6110-01-250-5054
NSN 5999-00-293-9449
NSN 5915-00-227-7098
NSN 5925-00-220-6841
NSN 5855-00-411-8688