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 5999-01-396-0337
NSN 5915-01-484-7489
NSN 5895-01-351-7391
NSN 5930-01-017-0186
NSN 6610-01-004-5856
NSN 6150-00-477-1595
NSN 5999-00-186-9314
NSN 5998-00-161-5161
NSN 4140-01-572-8983
NSN 6610-00-255-2752
NSN 5920-00-757-1900
NSN 5999-01-350-3477