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 5935-01-174-1144
NSN 5905-00-540-6997
NSN 6620-01-421-6949
NSN 5996-01-338-5256
NSN 5985-01-440-9976
NSN 5905-00-067-3800
NSN 6130-01-435-9241
NSN 6110-01-332-2513
NSN 5998-01-384-3156
NSN 6645-01-359-7875
NSN 5960-01-019-0017
NSN 6240-01-367-5756