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 6620-00-942-1751
NSN 5998-01-340-3682
NSN 6220-01-227-7307
NSN 5835-00-222-3956
NSN 6135-00-906-0984
NSN 6130-00-100-0175
NSN 6685-01-003-1081
NSN 6610-01-224-6956
NSN 5965-01-132-4018
NSN 6150-01-387-9376
NSN 5930-01-602-9356
NSN 5925-00-114-2253