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 6620-01-142-0084
NSN 5960-01-142-1995
NSN 5985-01-116-4529
NSN 6685-01-527-1899
NSN 5915-00-142-6912
NSN 5925-00-341-5875
NSN 5999-01-211-8641
NSN 6240-01-632-2700
NSN 6240-00-872-3365
NSN 5998-01-344-7421
NSN 6320-01-495-1244
NSN 5915-00-765-6969