2 by way of the actuating element 4 when the electromagnet 11 is excited the tilting armature 14 is tilted up onto the electromagnet 11 against the force of the spring element 16 so that the actuating element 4 pivots by means of a further spring element 17 into the second setting position in which the second closure member 6 comes into contact with the second valve seat 3 the pivoting operation is explained again in greater detail below with reference to fig2 to 4 the normal or inactive position of the actuating element 4 corresponds to the position according to fig1 in which the electromagnet 11 is currentless fig3 shows an intermediate position in which the tilting armature is already partially tilted up in this intermediate position the actuating element 4 is supported by both projections 4a 4b and both closure members 5 6 are lifted off from their valve seats 2 3 finally in fig4 the second setting position is shown in which the tilting armature is tilted up onto the electromagnet 11 accordingly in order to proceed from the first setting position according to fig2 to the second setting position according to fig4 the electromagnet must merely tilt the tilting armature 14 counterclockwise in this case the power of the electromagnet must be chosen to be of such a magnitude that the force component of the spring element 16 which counteracts this movement is overcome however the actual pivoting work is essentially provided by the further spring element 17 therefore means for generating a force component.