I claim the ornamental design for a dual port slide valve, as shown and described.
FIG. 1 is an isometric view of the dual port slide valve looking downwardly toward the front of the valve;
FIG. 2 is a front view of the dual port slide valve;
FIG. 3 is a rear view of the dual port slide valve;
FIG. 4 is a right side view of the dual port slide valve;
FIG. 5 is a left side view of the dual port slide valve;
FIG. 6 is a top view of the dual port slide valve; and,
FIG. 7 is a bottom view of the dual port slide valve.
Dash lines represent the environment of the design and form no part of the claimed design.
The design is a slide valve that is used on a commercial vehicle fuel tank. A left hand version is used on a left hand fuel tank on the commercial vehicle and a right hand version is used on a right hand fuel tank on the commercial vehicle. The left hand version and the right hand version of the slide valve are mirror images of one another. The design claimed in this design patent covers both left hand and right hand versions of the slide valve even though only one version is shown for ease of illustration.