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 6645-01-446-1994
NSN 5945-00-244-1548
NSN 6650-01-193-5911
NSN 5930-01-399-3583
NSN 5985-01-486-7713
NSN 5950-01-352-4460
NSN 5925-00-910-3594
NSN 6620-00-959-6614
NSN 5999-00-284-3986
NSN 5920-01-418-4381
NSN 5960-01-614-0489
NSN 5915-00-011-1612