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 6685-00-927-6280
NSN 5935-01-384-9933
NSN 5920-00-237-0995
NSN 7035-01-462-1957
NSN 5985-00-046-1877
NSN 5985-00-293-8322
NSN 5835-01-264-8782
NSN 7035-00-481-5182
NSN 5895-01-030-2795
NSN 5985-00-433-7014
NSN 5835-01-589-4735
NSN 5950-01-033-1770