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 5999-01-534-7592
NSN 6145-00-323-6021
NSN 2925-00-693-5748
NSN 5930-01-589-1091
NSN 5895-00-284-4835
NSN 2925-00-836-2323
NSN 5925-01-358-0308
NSN 4140-00-322-9987
NSN 5998-01-450-4510
NSN 5985-00-186-8755
NSN 2925-01-171-2511
NSN 5960-01-293-6624