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 4140-00-727-3731
NSN 5960-00-060-3752
NSN 6105-01-144-4467
NSN 5910-01-571-8500
NSN 5835-01-507-0731
NSN 5999-01-274-4940
NSN 5915-01-202-4884
NSN 5985-01-572-2106
NSN 6650-01-062-1926
NSN 5915-01-304-1239
NSN 7035-01-374-0005
NSN 6610-01-029-8749