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 5998-01-581-9632
NSN 6610-01-167-8747
NSN 6620-01-519-7234
NSN 5835-01-310-8979
NSN 7035-01-344-8708
NSN 6240-00-603-6662
NSN 5975-01-017-2221
NSN
NSN 6220-00-145-1423
NSN 6650-00-766-7435
NSN 5975-00-126-4592
NSN 5999-01-256-6957