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 6130-01-450-2776
NSN 5950-00-206-3213
NSN 6620-01-180-5855
NSN 5905-00-862-5020
NSN 5999-01-206-7025
NSN 5999-01-156-0007
NSN 5920-01-539-9950
NSN 6110-01-032-2899
NSN 6105-01-270-3795
NSN 6650-01-293-5557
NSN 7035-00-238-3662
NSN 6320-01-054-3046