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 5985-01-371-0637
NSN 5945-01-245-8635
NSN 7035-01-491-1464
NSN 6220-01-634-0660
NSN 5998-01-444-7026
NSN 7035-01-123-8723
NSN 6645-00-139-9239
NSN 5965-00-150-1144
NSN 6220-00-324-7474
NSN 6135-01-168-2944
NSN 5950-01-432-2038
NSN 5950-01-445-4187