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 4140-00-528-2921
NSN 6105-01-546-7832
NSN 6135-00-196-5267
NSN 7035-00-553-6951
NSN 6220-01-543-2443
NSN 6110-00-106-5328
NSN 6135-00-027-3914
NSN 5996-01-023-7896
NSN 5975-01-616-0754
NSN 5990-00-067-6791
NSN 5835-01-325-5677
NSN 6620-00-992-5876