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 5985-01-327-3017
NSN 4140-01-211-6474
NSN 6135-01-633-8502
NSN 6145-00-022-0818
NSN 5915-00-760-5660
NSN 6220-00-443-1693
NSN 6110-00-141-1966
NSN 5998-00-591-0611
NSN 5910-01-598-6253
NSN 5975-01-212-5830
NSN 6110-00-038-7230
NSN 6620-01-502-7105