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 5965-01-307-8301
NSN 5920-01-418-1821
NSN 5920-01-626-5520
NSN 6620-01-476-7355
NSN 5999-01-371-2185
NSN 7035-00-529-3128
NSN 6685-01-332-9680
NSN 5975-00-619-7900
NSN 5998-01-093-3091
NSN 6220-00-786-7109
NSN 6610-00-281-5358
NSN 7035-01-106-3476