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 6240-01-384-3887
NSN 5835-01-362-1946
NSN 5996-01-088-8715
NSN 6685-01-523-9632
NSN 5950-01-525-8631
NSN 5910-00-599-8139
NSN 5925-01-143-5055
NSN 5999-01-186-1937
NSN 5990-00-419-0236
NSN 6645-01-319-0006
NSN 6610-01-391-6781
NSN 6220-00-873-6261