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 5930-00-251-4619
NSN 5960-00-021-5618
NSN 5905-01-616-0549
NSN 5999-01-227-4053
NSN 5999-01-408-1912
NSN 6620-01-556-1695
NSN 6130-00-296-4116
NSN 2925-01-072-7101
NSN 5905-01-212-2792
NSN 5935-00-689-9750
NSN 6130-01-547-2634
NSN 6620-01-655-4591