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 5990-01-455-2919
NSN 5935-00-584-4541
NSN 5998-00-084-9937
NSN 6645-01-331-5674
NSN 5855-01-470-8852
NSN 5998-01-469-0940
NSN 5999-01-006-8631
NSN 5930-01-387-9465
NSN 5855-00-055-1694
NSN 6645-00-983-2046
NSN 5910-01-245-6619
NSN 5855-01-260-3693