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 5920-01-591-7427
NSN 5905-00-158-5053
NSN 6130-00-025-1799
NSN 7035-01-024-9511
NSN 5905-01-102-9810
NSN 5925-00-789-3718
NSN 5990-00-238-3333
NSN 5990-01-512-9129
NSN 5996-00-679-5233
NSN 2925-01-649-7543
NSN 5910-01-050-9654
NSN 6130-01-540-6506