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 5985-01-275-3979
NSN 5925-01-406-4093
NSN 4140-01-132-4527
NSN 5996-01-450-5526
NSN 5835-00-073-0790
NSN 6240-00-538-8907
NSN 6220-01-294-6453
NSN 5999-01-441-8219
NSN 7035-01-487-5036
NSN 5990-01-217-1550
NSN 2925-00-923-5375
NSN 5920-00-137-3977