Valve size 4.000 in.
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 5998-00-248-7472
NSN 6620-00-383-8740
NSN 6620-00-690-8905
NSN 2925-01-520-4194
NSN 6620-01-384-2105
NSN 6220-00-306-1806
NSN 4140-00-092-1534
NSN 5925-01-145-5484
NSN 5960-01-029-4253
NSN 5930-01-049-5779
NSN 5925-01-420-7589
NSN 6320-00-646-3311