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 5990-00-254-4825
NSN 5996-01-605-7650
NSN 5999-01-332-1554
NSN 6685-01-191-7333
NSN 6685-01-359-4481
NSN 5999-01-296-0095
NSN 6220-01-253-0380
NSN 4140-01-386-6688
NSN 5910-00-932-2942
NSN 5915-01-131-4093
NSN 6650-01-310-7403
NSN 5999-01-217-3748