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 5999-01-231-9728
NSN 5965-01-453-4403
NSN 5930-00-246-5599
NSN 5985-00-369-9299
NSN 6240-00-607-4303
NSN 6135-01-417-6539
NSN 5935-01-241-6470
NSN 6650-01-334-5789
NSN 5895-00-988-1842
NSN 5945-01-243-0893
NSN 2925-01-311-7840
NSN 5975-01-010-3722