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 6620-01-210-1968
NSN 5935-01-412-8664
NSN 6645-01-498-5102
NSN 5975-01-373-1724
NSN 5935-01-472-2470
NSN 5999-01-317-6034
NSN 6220-00-314-9680
NSN 5965-01-474-5654
NSN 5935-01-197-0480
NSN 5930-01-078-3700
NSN 6135-01-216-9771
NSN 6620-00-726-8153