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 5999-01-506-4537
NSN 4140-01-224-6994
NSN 5985-01-004-9716
NSN 6320-01-172-6103
NSN 7035-01-270-0325
NSN 6610-00-717-6666
NSN 6685-01-419-0909
NSN 6240-01-147-0379
NSN 6220-00-601-3458
NSN 5985-01-603-4604
NSN 6220-00-686-5328
NSN 6130-01-062-2244