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 6685-00-100-4753
NSN 6105-00-295-2558
NSN 6645-01-198-5785
NSN 6150-01-534-6854
NSN 5998-00-734-8314
NSN 4140-01-140-4552
NSN 5855-01-034-3845
NSN 5855-01-191-3404
NSN 5975-00-698-9853
NSN 5855-01-620-0958
NSN 7035-00-631-3782
NSN 6110-01-554-7406