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 5985-01-293-7594
NSN 6610-01-486-7954
NSN 5895-00-233-7309
NSN 6645-00-137-1167
NSN 5998-01-200-8161
NSN 6645-01-619-2756
NSN 2925-01-302-3098
NSN 6610-00-968-8193
NSN 5925-01-634-0664
NSN 6240-00-557-3426
NSN 6645-00-183-8812
NSN 6620-00-001-1398