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 5835-00-378-1429
NSN 6220-01-225-1876
NSN 6130-01-647-0510
NSN 6620-00-984-7252
NSN 6105-01-532-8222
NSN 6135-01-429-9029
NSN 6620-00-006-6418
NSN 5915-00-400-1816
NSN 5960-01-484-7966
NSN 6320-01-029-4220
NSN 5915-01-577-4016
NSN 5925-01-570-3236