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 6150-00-100-1302
NSN 4140-01-621-2338
NSN 6135-01-275-1363
NSN 6110-01-612-0943
NSN 5895-01-028-5344
NSN 6130-01-031-5057
NSN 5945-01-474-1031
NSN 5965-01-030-7253
NSN 5855-01-463-1315
NSN 5855-00-921-6589
NSN 6620-01-219-0923
NSN 6105-01-214-8870