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 5915-01-471-0525
NSN 6110-01-646-8044
NSN 5835-01-550-5094
NSN 5895-01-086-1342
NSN 5895-01-398-0482
NSN 5999-01-139-5204
NSN 5960-01-271-0928
NSN 5990-00-252-1702
NSN 6145-01-650-8053
NSN 5999-01-208-9550
NSN 6150-01-189-5943
NSN 5835-01-310-8979