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 5960-00-529-0583
NSN 5925-01-399-3551
NSN 5998-01-344-1025
NSN 6130-01-514-0108
NSN 5915-00-765-6969
NSN 5835-00-770-2843
NSN 6240-01-254-7599
NSN 6685-01-552-2945
NSN 6620-00-469-4571
NSN 5935-01-422-1555
NSN 5910-01-421-3340
NSN 6620-00-760-4332