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 5935-00-281-1237
NSN 6220-01-502-0014
NSN 6610-00-341-1871
NSN 5950-01-326-7667
NSN 6620-01-070-9042
NSN 6130-00-433-9422
NSN 6220-01-486-7877
NSN 5999-01-626-3453
NSN 5835-01-391-4556
NSN 5855-00-629-5343
NSN 6620-00-785-6019
NSN 6145-01-392-6545