Ball Valve

FIG. 1 is a perspective view of a ball valve according to the present application, showing our new design; FIG. 2 is a front view thereof, and a rear view being identical to the front view; FIG. 3 is a left side view thereof, and a right side view being identical to the left side view; FIG. 4 is a top view thereof; and, FIG. 5 is a bottom view thereof. The broken lines in the drawings depict portions of the ball valve that form no part of the claimed design.