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 5905-00-455-2470
NSN 5975-01-486-9631
NSN 5920-01-425-2754
NSN 6135-01-264-1311
NSN 6650-01-619-2129
NSN 6135-01-101-5039
NSN 5910-01-353-5338
NSN 6320-01-506-9439
NSN 6685-01-606-1660
NSN 6240-01-582-1227
NSN 4140-01-196-5984
NSN 6610-00-935-7131