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 2925-01-443-1748
NSN 5998-01-017-9922
NSN 5990-01-504-9265
NSN 6685-01-248-9351
NSN 6105-01-072-6443
NSN 6240-01-028-2971
NSN 6685-01-355-3550
NSN 6135-01-430-3119
NSN 7035-01-332-3496
NSN 5999-00-572-0266
NSN 5950-00-988-5465
NSN 6145-01-658-1595