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 6135-00-127-1683
NSN 6620-00-399-0087
NSN 5855-01-343-7943
NSN 5960-01-101-5672
NSN 6145-00-657-4755
NSN 5935-01-633-2415
NSN 6320-00-004-9158
NSN 5905-00-814-1720
NSN 5998-00-734-5346
NSN 5835-01-126-9358
NSN 5935-00-933-5287
NSN 5945-00-853-8579