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 6240-01-600-1092
NSN 6135-01-226-4071
NSN 5920-01-587-1752
NSN 6105-01-052-0492
NSN 6130-01-215-2397
NSN 6220-00-883-9675
NSN 6610-01-421-4396
NSN 5975-00-226-8429
NSN 5950-01-218-0811
NSN 5935-00-201-6427
NSN 6135-01-495-0933
NSN 6620-01-428-7072