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 5998-00-100-4948
NSN 2925-01-170-1089
NSN 5915-00-117-4688
NSN 6220-01-485-2381
NSN 5910-01-189-8044
NSN 6650-01-230-3032
NSN 5985-00-107-0574
NSN 6610-01-590-7222
NSN 6145-01-481-0131
NSN 5998-00-231-5580
NSN 5950-01-138-2928
NSN 5835-01-606-8768