The ornamental design for an expansionvalve, as shown and described.
FIG. 1 is a front perspective view of an expansion valve showing our new design;
FIG. 2 is a rear perspective view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a rear view thereof;
FIG. 5 is a right side view thereof, a left side view being symmetrical to the right side view;
FIG. 6 is a plan view thereof; and,
FIG. 7 is a bottom view thereof.
The regular dashed lines represent unclaimed portions of the expansion valve and form no part of the claimed design.
The short/long dashed lines represent the boundary between claimed and unclaimed portions of the expansion valve. None of the broken lines form a part of the claimed design.