Valve size 4.000 in.
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 6240-01-363-3810
NSN 5930-01-345-3212
NSN 5920-00-201-4914
NSN 6130-01-501-2611
NSN 6110-00-636-1234
NSN 6320-01-476-7476
NSN 5975-00-924-8081
NSN 6610-01-250-9327
NSN 7035-01-365-6246
NSN 6220-01-150-6730
NSN 5915-01-042-4166
NSN 5950-01-193-3276