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 6620-00-394-1812
NSN 5905-01-048-3648
NSN 5930-00-954-1891
NSN 5930-01-225-0654
NSN 7035-01-191-2822
NSN 6110-00-161-2310
NSN 6240-01-555-4832
NSN 6220-00-635-8818
NSN 5999-01-432-0934
NSN 6220-01-429-0946
NSN 5835-01-370-8912
NSN 6220-00-068-1000