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 5855-01-375-2152
NSN 5930-01-528-7970
NSN 6620-00-130-0815
NSN 6645-01-043-3179
NSN 5960-01-342-1961
NSN 6240-01-614-9272
NSN 6135-00-553-7995
NSN 6220-01-420-1856
NSN 6620-01-308-2692
NSN 6645-00-333-6244
NSN 5996-01-099-2841
NSN 5835-01-261-9878