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 5975-01-501-0993
NSN 5935-01-222-1717
NSN 6150-00-884-3526
NSN 5999-01-391-7003
NSN 5945-00-022-7805
NSN 5999-00-431-3291
NSN 5895-01-531-2336
NSN 6320-00-270-8222
NSN 6220-01-107-8096
NSN 6620-01-396-2149
NSN 6145-01-460-3524
NSN 6220-01-227-5364