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 5920-00-196-3631
NSN 2925-01-622-8568
NSN 6110-01-129-7135
NSN 6220-00-682-8292
NSN 6145-01-412-0177
NSN 5990-01-442-3520
NSN 6620-01-338-8945
NSN 5905-00-656-6627
NSN 5920-01-130-9683
NSN 6685-01-065-3511
NSN 6150-01-355-1228
NSN 5915-01-062-0592