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 5935-00-450-7514
NSN 6220-01-465-3292
NSN 6620-01-026-0346
NSN 6105-00-409-4162
NSN 5925-00-763-7687
NSN 5915-01-599-2343
NSN 2925-00-251-0105
NSN 5905-00-509-7015
NSN 5975-01-388-7431
NSN 5945-01-192-0960
NSN 6220-01-183-5378
NSN 6610-01-445-6687