Circulation valve

Description

FIG. 1 is a perspective view of a circulation valve showing of my new design.

FIG. 2 is a front view thereof.

FIG. 3 is a rear view thereof.

FIG. 4 is a right side view thereof.

FIG. 5 is a left side view thereof.

FIG. 6 is a top view thereof.

FIG. 7 is a bottom view thereof; and,

FIG. 8 is a rear, left, bottom perspective view thereof.

The broken lines in the drawings depict portions of the circulation valve that form no part of the claimed design.

Claims

The ornamental design for a circulation valve, as shown and described.