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 6135-00-826-4798
NSN 6650-01-608-6349
NSN 6645-00-183-8812
NSN 6620-00-103-6610
NSN 5895-01-065-1659
NSN 6220-01-537-9400
NSN 5960-01-496-7837
NSN 5990-00-862-3271
NSN 6150-00-917-4408
NSN 5998-01-424-6810
NSN 5950-00-832-7999
NSN 5950-01-157-2222