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 6150-00-599-0721
NSN 6685-01-281-3545
NSN 6620-01-104-5510
NSN 5855-00-688-9954
NSN 5996-01-003-1955
NSN 5905-01-492-5761
NSN 6240-01-066-0110
NSN 6685-00-559-2742
NSN 5999-01-054-4359
NSN 5965-01-417-3211
NSN 6685-01-381-0759
NSN 5960-01-124-7598