OneHydraulics offers a full line of ball valves designed specifically for excavators, often used to add functions to existing equipment. These valves are used to shut off or change media flow paths, and they are integral to the operation and maintenance of many fluid power applications. A ball valve is generally a shut-off valve that controls the flow of fluid using a rotating ball with a bore in its center. Connected to the ball is a stem, which rotates to open or close the valve.