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 6240-01-020-0224
NSN 6645-01-633-1852
NSN 4140-01-520-4801
NSN 5945-01-519-8887
NSN 5950-01-131-8548
NSN 5925-01-232-0450
NSN 6135-00-840-6451
NSN 6145-01-432-0088
NSN 6610-01-075-2773
NSN 5996-01-449-0666
NSN 5935-01-220-1943
NSN 5996-01-391-9585