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 4140-01-192-2015
NSN 6650-01-133-7806
NSN 6240-01-480-5897
NSN 5999-00-423-8142
NSN 5930-01-545-1415
NSN 6135-00-474-1397
NSN 6135-01-456-7541
NSN 5935-01-600-6087
NSN 5905-01-479-4543
NSN 5935-01-659-9877
NSN 5996-01-171-2132
NSN 5975-00-399-6100