Abstract: An arrangement is disclosed for adjusting a valve which has a tappet which is under the effect of a restoring spring. In a housing (9) which is to be attached to the valve, a temperature-dependent actuating element (11) which interacts with a working piston (13) is arranged. The actuating element is a metallic component (11) which is composed of an alloy and has an impressed shape memory which extends essentially transversely with respect to the direction of movement of the tappet of the valve. Including the working piston (13) it can be adjusted in the direction of movement of the tappet between two end positions which correspond on the one hand to the open position of the valve and on the other hand to its closed position. The metallic component (11) assumes a shape corresponding to the impressed shape memory when it is heated in its first end position.