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 5998-00-619-1663
NSN 5915-00-171-1812
NSN 5950-01-505-3517
NSN 6130-00-853-7177
NSN 6685-00-815-3342
NSN 4140-01-220-4377
NSN 5998-01-356-9892
NSN 2925-01-194-9737
NSN 5895-01-300-1110
NSN 5996-00-907-5066
NSN 6135-01-167-7604
NSN 5835-00-987-9341