4.000 in. Size
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 5915-01-323-9030
NSN 5960-01-069-2009
NSN 6105-00-753-8756
NSN 5945-01-032-8496
NSN 5855-00-832-9341
NSN 5935-00-994-4224
NSN 6105-01-613-6588
NSN 4140-01-620-6384
NSN 5835-00-921-1662
NSN 6240-01-481-1796
NSN 6320-01-255-2096
NSN 5905-01-194-9455