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 5855-00-973-5717
NSN 5910-01-484-7984
NSN 5925-01-184-6912
NSN 5920-00-497-1916
NSN 6620-01-314-8432
NSN 6650-00-478-5247
NSN 5999-00-651-8997
NSN 5985-01-353-6279
NSN 5920-00-578-3750
NSN 5985-00-862-0171
NSN 6105-01-586-3592
NSN 6105-01-510-4247