The ornamental design for a valve handle, as shown and described.
FIG. 1 is a top perspective view of a valve handle showing our new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof; and,
FIG. 8 is a bottom perspective view thereof.
The broken lines shown in the figures are included for the purpose of illustrating portions of the valve handle which form no part of the claimed design.