Valve size 4.000 in.
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 5945-01-128-5418
NSN 5998-01-279-7503
NSN 6650-01-071-1234
NSN 6620-00-820-9616
NSN 5999-00-591-6774
NSN 6150-00-701-3433
NSN 5905-01-292-4462
NSN 5945-01-627-7489
NSN 6620-00-193-9503
NSN 5905-01-363-1730
NSN 6110-01-462-8776
NSN 6135-01-338-2281