4820-01-244-3544 (FIG6682X-11/2IN)
4820-01-244-3544 is equivalent to manufacture part number B-97809,1. It is a lift-check valve and is classified under Federal Supply Class 4820 (4820 - Valves, Nonpowered), stocked for defense, aerospace, MRO, and industrial maintenance applications. This item is cataloged in the NATO supply system under 4820 - Valves, Nonpowered and is available through NSN-PARTS for U.S. government MRO, and commercial procurement.