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 5935-01-657-7495
NSN 6685-01-069-2683
NSN 6135-01-265-1384
NSN 5855-01-133-3587
NSN 6145-01-018-1752
NSN 5835-01-138-8622
NSN 6610-00-166-7406
NSN 6150-00-217-0475
NSN 6685-00-637-8553
NSN 4140-01-139-4877
NSN 5835-01-152-8452
NSN 6610-01-454-5552