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 5930-01-421-4471
NSN 5975-01-431-4347
NSN 6145-01-174-4756
NSN 5835-00-853-7785
NSN 5920-00-097-7648
NSN 6105-01-072-0481
NSN 5920-01-510-3933
NSN 6240-01-125-2060
NSN 2925-01-157-9204
NSN 5960-00-842-5077
NSN 5996-01-440-0634
NSN 6105-01-128-7914