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 5855-00-908-6402
NSN 5855-01-521-8616
NSN 6220-01-474-5989
NSN 5945-00-673-3964
NSN 7035-00-231-2871
NSN 6320-01-607-0347
NSN 5960-01-374-8975
NSN 5910-01-416-7096
NSN 6650-01-025-7425
NSN 6610-01-381-0652
NSN 5895-01-634-0630
NSN 2925-01-036-4213