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 6240-01-490-6922
NSN 4140-01-463-3295
NSN 6610-00-278-7647
NSN 5950-01-173-2137
NSN 6610-01-293-3733
NSN 6650-00-983-6722
NSN 5935-01-334-6689
NSN 7035-01-483-1531
NSN 6620-01-423-0833
NSN 5975-01-416-3554
NSN 5990-01-079-3271
NSN 6135-00-932-3136