I claim the ornamental design for a valve handle, as shown.
FIG. 1 is a top, front, left perspective view of the valve handle embodying my new design;
FIG. 2 is a front, bottom, right side perspective view thereof;
FIG. 3 is a top plan view thereof;
FIG. 4 is a bottom plan view thereof;
FIG. 5 is a front elevational view thereof;
FIG. 6 is a rear elevational view thereof; and,
FIG. 7 is left side elevational view thereof, with the right side elevational view being a mirror image thereof.
The broken lines showing portions of the handle are included for the purpose of illustrating a portion of the handle that forms no part of the claimed design.