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 6110-01-176-2557
NSN 4140-00-399-0972
NSN 5920-01-119-1896
NSN 6650-01-313-9752
NSN 5925-01-270-1040
NSN 5996-01-442-4136
NSN 5895-00-086-8772
NSN 6130-01-154-0132
NSN 5895-01-310-9033
NSN 6220-01-532-3719
NSN 4140-01-366-0336
NSN 5905-01-580-0718