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 5950-00-470-1601
NSN 6145-01-145-5177
NSN 5910-01-041-9167
NSN 6685-00-186-9190
NSN 6645-01-642-1300
NSN 5930-01-021-9569
NSN 6645-01-004-0803
NSN 5925-00-100-5760
NSN 4140-01-591-0004
NSN 5920-01-492-6512
NSN 6610-00-358-1905
NSN 2925-01-386-7392