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 5895-01-641-0779
NSN 6145-01-436-3738
NSN 6240-01-058-7207
NSN 6135-01-384-4395
NSN 6620-00-500-0041
NSN 6620-01-030-0525
NSN 5855-00-361-0167
NSN 6320-01-456-2859
NSN 5920-01-554-9804
NSN 5950-01-096-1993
NSN 6685-00-876-0328
NSN 5910-00-737-0484