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 5990-01-328-8225
NSN 6685-01-229-9123
NSN 6105-01-381-2012
NSN 5985-00-607-0163
NSN 2925-01-202-7235
NSN 6150-01-613-2882
NSN 5925-01-435-4409
NSN 5999-01-077-4752
NSN 5990-00-518-0684
NSN 5998-00-014-1171
NSN 6220-01-371-1115
NSN 6645-00-527-6531