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 6685-00-081-2044
NSN 6620-01-173-2186
NSN 5835-00-933-9609
NSN 5999-00-501-0703
NSN 5998-01-381-2018
NSN 6105-01-106-0060
NSN 5998-01-106-3446
NSN 5999-01-486-9395
NSN 5935-01-243-2786
NSN 6240-01-110-1363
NSN 7035-01-227-7492
NSN 5920-00-613-3116