The ornamental design of an adapter for valve, as shown and described.
FIG. 1 is a top perspective view of an adapter for valve showing our new design;
FIG. 2 is a side elevational view thereof, the opposite side elevational view being a mirror image of FIG. 2;
FIG. 3 is a front elevational view thereof, the rear elevational view being a mirror image of FIG. 3;
FIG. 4 is a top plan view thereof; and,
FIG. 5 is a bottom plan view thereof.
The broken lines shown in the figures are included for the purpose of illustrating portions of the adapter for valve and form no part of the claimed design.