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 5999-01-646-1715
NSN 5975-00-649-6939
NSN 6645-00-726-2716
NSN 5985-01-274-9549
NSN 5925-01-386-6188
NSN 6220-01-519-9305
NSN 5935-01-657-8898
NSN 5855-01-578-1396
NSN 5999-00-872-5565
NSN 6135-01-469-7574
NSN 5975-01-141-6531
NSN 6610-01-351-4607