Expansion Valve

FIG. 1 is a top, front and left perspective view of an expansion valve comprising a new, original and ornamental design;

FIG. 2 is a rear view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a left view thereof; and,

FIG. 7 is a right view thereof.

The broken lines shown in the figures illustrate portions of the expansion valve that form no part of the claimed design.