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 6620-01-138-6132
NSN 6240-01-297-6165
NSN 5998-01-133-2154
NSN 2925-01-175-1217
NSN 5975-01-224-7209
NSN 5895-01-237-6425
NSN 5920-01-300-0425
NSN 5930-00-552-5747
NSN 2925-01-068-3844
NSN 5910-00-684-6784
NSN 6135-00-078-9931
NSN 6220-01-227-4152