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 5996-01-553-4542
NSN 5999-01-287-3640
NSN 5895-01-122-0606
NSN 5975-01-147-1453
NSN 5990-00-518-3195
NSN 6150-00-448-2357
NSN 5990-00-382-5885
NSN 5895-00-614-2119
NSN 5965-01-412-5557
NSN 6645-01-198-4078
NSN 6650-01-144-5351
NSN 6620-01-513-6358