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 5975-01-250-8818
NSN 5990-01-503-6827
NSN 4140-01-123-9149
NSN 5915-00-278-5561
NSN 5930-00-429-8834
NSN 5950-00-930-8594
NSN 5935-00-011-5031
NSN 6320-00-468-8421
NSN 6145-01-495-1360
NSN 6135-01-156-4627
NSN 5935-01-575-4543
NSN 5895-01-224-9817