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 5990-01-197-6922
NSN 5950-00-639-9675
NSN 6150-01-516-4717
NSN 6220-01-518-8806
NSN 6240-00-655-2523
NSN 5990-01-235-8404
NSN 6650-01-576-7919
NSN 6320-00-937-5625
NSN 4140-00-735-4957
NSN 5835-00-880-6477
NSN 5996-01-480-3239
NSN 6685-01-304-4374