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 6145-01-509-7729
NSN 6130-01-459-5505
NSN 5935-00-567-4530
NSN 4140-01-118-6848
NSN 6240-01-093-7323
NSN 4140-01-507-3172
NSN 7035-01-042-5308
NSN 5975-01-416-4960
NSN 5990-00-173-9401
NSN 6130-01-214-0366
NSN 6135-00-318-8359
NSN 5835-00-583-1316