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 6685-00-886-1135
NSN 5895-00-707-6663
NSN 5990-00-867-5354
NSN 6145-01-085-6799
NSN 6145-01-419-6050
NSN 6130-01-182-0025
NSN 6650-01-020-6148
NSN 5920-00-983-1241
NSN 5920-01-351-9822
NSN 6650-01-382-8569
NSN 4140-01-068-3500
NSN 5895-01-020-2263