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 5945-01-661-0250
NSN 5990-00-170-4239
NSN 6645-00-176-0223
NSN 5960-01-599-9821
NSN 6220-00-475-0217
NSN 5960-00-605-9192
NSN 5998-01-286-2124
NSN 6645-01-437-9017
NSN 6645-00-938-2173
NSN 5915-01-352-1274
NSN 6130-01-644-7721
NSN 5835-00-021-5913