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 5950-00-370-0091
NSN 5835-01-384-3206
NSN 6110-01-284-0318
NSN 5990-01-421-5342
NSN 4140-01-352-2924
NSN 5920-01-657-2255
NSN 6650-00-287-5868
NSN 6220-01-452-4384
NSN 6620-01-510-3501
NSN 5910-01-431-4599
NSN 6130-01-132-3756
NSN 5960-00-297-7099