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 5945-01-227-0128
NSN 6105-01-346-1347
NSN 6150-01-086-1511
NSN 5975-01-227-2714
NSN 5965-01-546-8119
NSN 4140-01-538-4774
NSN 5990-01-143-2518
NSN 6240-01-310-7115
NSN 6145-00-804-7882
NSN 5915-01-340-5953
NSN 5960-00-099-9790
NSN 5855-01-253-6076