The ornamental design for a valvelever, as shown and described.
FIG. 1 is a perspective view of a valve lever showing my new design;
FIG. 2 is a front elevation view thereof;
FIG. 3 is a rear elevation view thereof;
FIG. 4 is a right side elevation view thereof;
FIG. 5 is a left side elevation view thereof; and,
FIG. 6 is a top plan view thereof, with the bottom plan view being a mirror image thereof.
The evenly-spaced broken lines depict portions of the valve lever which form no part of the claimed design. The unevenly-spaced broken lines depict a boundary of the claimed portion and form no part of the claimed design.