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 5925-01-424-1407
NSN 5855-01-383-6860
NSN 6105-00-707-5962
NSN 6610-01-474-6333
NSN 6685-01-480-2988
NSN 5920-01-412-2540
NSN 5835-00-137-7945
NSN 5835-01-125-0303
NSN 5915-01-215-1473
NSN 5960-01-089-8155
NSN 6135-01-113-1507
NSN 6620-01-658-5768