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 4140-00-232-1039
NSN 5945-01-419-6732
NSN 5925-01-356-4519
NSN 5985-01-049-7490
NSN 6320-00-564-2772
NSN 6240-01-630-0123
NSN 5920-00-177-2738
NSN 5965-01-310-3053
NSN 6135-01-223-3869
NSN 6240-01-570-7149
NSN 6105-00-957-9252
NSN 6130-00-895-3297