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 6150-01-194-1584
NSN 6645-00-016-0594
NSN 6145-01-397-8526
NSN 6105-01-445-6130
NSN 4140-01-130-7858
NSN 5925-00-190-0095
NSN 6320-00-405-2348
NSN 6150-01-297-4647
NSN 7035-00-500-7839
NSN 6620-00-945-3072
NSN 5960-01-462-1864
NSN 5855-01-428-9456