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 5985-00-529-0093
NSN 6610-00-159-1119
NSN 6135-01-167-7604
NSN 6620-01-206-5748
NSN 5895-01-129-8749
NSN 5835-00-153-4100
NSN 6220-00-200-7888
NSN 6135-00-593-6831
NSN 5895-00-079-0635
NSN 5935-00-964-7671
NSN 6610-00-489-9730
NSN 5925-01-633-4041