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 2925-01-139-5144
NSN 5915-00-528-9286
NSN 6110-01-422-0873
NSN 6110-00-939-7065
NSN 6240-01-355-4425
NSN 5935-01-378-6744
NSN 5990-00-206-3753
NSN 4140-01-273-4891
NSN 6685-00-954-5548
NSN 6130-01-327-3261
NSN 5925-01-420-5811
NSN 6685-00-103-2854