An application device for applying a flowable medium onto a substrate, having a discharge valve having a closure member which, in its open position, releases a metering opening of the discharge valve, such that the flowable medium can flow through the metering opening in the direction of the substrate, wherein the closure member is movable by an electromagnet of the discharge valve from a closing position, in which it closes the metering opening, to an open position, and having a main control unit, which is connected to the discharge valve, and which delivers electrical output voltage signals which moves and maintains the closure member to the open position. A modification unit is arranged between the main control unit and the discharge valve, which is configured such it receives output voltage signals from the main control unit, modifies these signals and relays the latter in a modified form to the electromagnet.