The ornamental design for a valveactuator, as shown and described.
FIG. 1 is a perspective view of my new design showing valve actuator, the
broken line showing a valve assembly is for environmental illustration
only and forms no part of the claimed design;
FIG. 2 is a top plan view of the valve actuator shown in FIG. 1;
FIG. 3 is a front elevational view thereof;
FIG. 4 is a rear elevational view thereof; and,
FIG. 5 is a side elevational view thereof (the opposite side being a mirror
image).