Valve disk

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

FIG. 1 is a front view of a valve disk showing my new design, the rear, left side and right side views being the same;

FIG. 2 is a front perspective view thereof;

FIG. 3 is a top view thereof; and,

FIG. 4 is a bottom view thereof.

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Executed on	Assignor	Assignee	Conveyance	Frame	Reel	Doc
Aug 20 2015		WD RACING OY	(assignment on the face of the patent)

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