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 6220-01-225-6734
NSN 5910-01-080-5740
NSN 6240-01-141-5230
NSN 2925-01-643-8395
NSN 5999-01-250-3266
NSN 6320-01-409-1388
NSN 5975-01-376-8882
NSN 5905-00-255-7309
NSN 5985-01-530-5648
NSN 5905-00-856-1585
NSN 5998-00-593-2978
NSN 5990-00-559-1822