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 6240-01-281-2597
NSN 5975-01-384-7912
NSN 6650-01-159-4251
NSN 5950-01-020-7717
NSN 6620-01-070-9042
NSN 6650-00-170-5095
NSN 6650-01-425-1600
NSN 5835-01-307-8954
NSN 5935-01-480-6557
NSN 6610-01-589-5146
NSN 6620-01-599-2011
NSN 6650-01-322-4415