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 5855-01-105-7793
NSN 5999-01-281-7359
NSN 2925-01-435-9057
NSN 6220-00-944-4512
NSN 5950-01-369-1838
NSN 4140-00-008-1875
NSN 6220-00-921-6948
NSN 5950-01-157-2796
NSN 6145-00-719-7395
NSN 5920-00-518-4452
NSN 4140-01-519-9343
NSN 5925-00-269-2685