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 (L) 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 (L), 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 (p1), and extends with the second end into a second chamber , in which the pressure medium is under a second pressure (p2), - 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 (d1), - the closing element comprises a second diameter (d2) which differs from the first diameter (d1), and - the size of the first trim and/or of the second trim is adapted to the first diameter (d1) and to the second diameter (d2), characterized in that the first diameter (d1) is larger than the second diameter (d2). - 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 (L) 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 (L), 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 (p1), and extends with the second end into a second chamber , in which the pressure medium is under a second pressure (p2), - 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 (d1), - the closing element comprises a second diameter (d2) which differs from the first diameter (d1), and - the size of the first trim and/or of the second trim is adapted to the first diameter (d1) and to the second diameter (d2), <EOS>