Electromagnetic actuating device, in particular for the opening and closing of a valve assembly, comprising - a coil unit, which can be supplied with a current, by means of which, when in the energized state, an anchor which is moveably mounted along a longitudinal axis of the actuating device, can be moved between a retracted position and an extended position, - a tappet, which interacts with the anchor and which is movably mounted along the longitudinal axis, having a first end with which the tappet interacts with a closing element for the opening and closing of the valve assembly, and having a second end, - wherein the tappet is arranged such that it extends with the first end into a first chamber, in which there is a pressure medium which is under a first pressure, and extends with the second end into a second chamber, in which the pressure medium is under a second pressure, - the tappet comprises a channel, having a first opening and a second opening, and the pressure medium can flow through the channel, - wherein the first opening is arranged in the first chamber and the second opening is arranged in the second chamber such that a fluid communication is provided between the first chamber and the second chamber, - wherein the first opening interacts fluidically with a first trim and/or the second opening interacts fluidically with a second trim, - wherein the tappet is implemented in a cylindrical shape and comprises a first diameter, - the closing element comprises a second diameter which differs from the first diameter, and - the size of the first trim and/or of the second trim is adapted to the first diameter and to the second diameter, characterized in that the first diameter is larger than the second diameter. - a coil unit, which can be supplied with a current, by means of which, when in the energized state, an anchor which is moveably mounted along a longitudinal axis of the actuating device, can be moved between a retracted position and an extended position, - a tappet, which interacts with the anchor and which is movably mounted along the longitudinal axis, having a first end with which the tappet interacts with a closing element for the opening and closing of the valve assembly, and having a second end, - wherein the tappet is arranged such that it extends with the first end into a first chamber, in which there is a pressure medium which is under a first pressure, and extends with the second end into a second chamber, in which the pressure medium is under a second pressure, - the tappet comprises a channel, having a first opening and a second opening, and the pressure medium can flow through the channel, - wherein the first opening is arranged in the first chamber and the second opening is arranged in the second chamber such that a fluid communication is provided between the first chamber and the second chamber, - wherein the first opening interacts fluidically with a first trim and/or the second opening interacts fluidically with a second trim, - wherein the tappet is implemented in a cylindrical shape and comprises a first diameter, - the closing element comprises a second diameter which differs from the first diameter, and - the size of the first trim and/or of the second trim is adapted to the first diameter and to the second diameter,