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 5998-01-367-9858
NSN 6130-01-041-0116
NSN 6610-01-651-0987
NSN 5930-01-549-1290
NSN 2925-01-424-0235
NSN 5925-01-541-9251
NSN 6135-00-823-3034
NSN 6685-00-321-3634
NSN 5990-00-402-7721
NSN 5975-01-555-9969
NSN 5990-00-594-7291
NSN 5975-01-013-8319