Metering valve

A metering valve having a closing body (12) and a valve seat (16), wherein the closing body (12) can be moved back and forth between a closed position, in which it sits on the valve seat (16) and closes off a material outlet (14), and an open position, in which it is lifted off from the valve seat (16) and releases the material outlet (14), having an activation element (20) firmly connected with the closing body (12) and having two piezo-actuators (22, 24), between which the activation element (20) is arranged, wherein in the closed position, the activation element (20) is arranged at a distance from a first one of the piezo-actuators (22), which distance is less than the maximal change in length of the first piezo-actuator (22), or lies loosely against the first piezo-actuator (22) and is arranged at a distance from the second one of the piezo-actuators (24), which distance is greater than the maximal change in length of the first piezo-actuator (22), and wherein in the open position, the activation element (20) is arranged at a distance from the second piezo-actuator (24) that is less than the maximal change in length of the second piezo-actuator (24), or lies loosely against the second piezo-actuator (24) and is arranged at a distance from the first piezo-actuator (22) that is greater than the maximal change in length of the second piezo-actuator (24).