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 4140-01-512-8528
NSN 6110-00-840-6560
NSN 5950-01-659-6644
NSN 6110-01-400-4207
NSN 5930-00-056-4490
NSN 6220-00-888-7235
NSN 5990-01-011-8022
NSN 5990-01-605-4769
NSN 7035-00-104-7613
NSN 5935-00-174-0940
NSN 6150-01-507-2326
NSN 6320-00-857-4073