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 6135-01-303-0295
NSN 6105-01-053-9394
NSN 6130-00-420-7961
NSN 5855-01-503-6973
NSN 6320-00-004-9158
NSN 5905-01-224-7196
NSN 5990-01-595-9441
NSN 5920-01-634-0250
NSN 6620-01-119-3396
NSN 5985-00-417-4566
NSN 6110-01-333-0651
NSN 4140-01-003-2501