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 5945-00-414-0159
NSN 6145-01-076-0899
NSN 5895-01-089-0551
NSN 6620-01-599-2011
NSN 5895-01-519-2089
NSN 6650-00-665-3658
NSN 4140-00-541-8861
NSN 5835-00-649-9402
NSN 6645-00-420-5072
NSN 5950-00-243-5743
NSN 6105-00-006-4184
NSN 6150-01-588-1161