Valve arrangement for switching and/or regulating a medium flow in an aerospace engine, comprising - a drive which has one or more electrically controllable actuators which, when a control voltage is applied, change(s) its/their length in the direction of a longitudinal axis of the valve arrangement; - a valve which comprises a valve piston which can be moved back and forth along the longitudinal axis by the drive and which has a valve element, wherein the valve piston has a piston plate which extends in a plane perpendicular to the longitudinal axis of the valve arrangement and which is arranged in a housing recess which extends inward in the direction of a drive housing and which is connected by way of its open end to a working chamber, wherein, duping the opening of the valve, the piston plate moves away from the working chamber in the direction of a recess plate; - a flexible dividing element which delimits a working chamber of the valve with respect to the drive, whereby the medium flowing through the valve or situated in the working chamber is hermetically separated from the drive; characterized in that - the dividing element is connected by way of the drive-side end to the piston plate; - a first spring is arranged between the recess plate and the piston plate, which first spring presses the valve element against the valve seat when a voltage is not applied to the one or more actuators; - the one or more actuators is/are supported by way of its/their other end on a head plate which is preloaded by way of a second spring, wherein the second spring exerts a spring preload on the one or more actuators; and - a valve piston head is in engagement with the head plate by virtue of the valve piston being led through a bore of the head plate and the valve piston head being connected, on the side situated opposite the one or more actuators, to the valve piston. - a drive which has one or more electrically controllable actuators which, when a control voltage is applied, change(s) its/their length in the direction of a longitudinal axis of the valve arrangement; - a valve which comprises a valve piston which can be moved back and forth along the longitudinal axis by the drive and which has a valve element, wherein the valve piston has a piston plate which extends in a plane perpendicular to the longitudinal axis of the valve arrangement and which is arranged in a housing recess which extends inward in the direction of a drive housing and which is connected by way of its open end to a working chamber, wherein, duping the opening of the valve, the piston plate moves away from the working chamber in the direction of a recess plate; - a flexible dividing element which delimits a working chamber of the valve with respect to the drive, whereby the medium flowing through the valve or situated in the working chamber is hermetically separated from the drive; - the dividing element is connected by way of the drive-side end to the piston plate; - a first spring is arranged between the recess plate and the piston plate, which first spring presses the valve element against the valve seat when a voltage is not applied to the one or more actuators; - the one or more actuators is/are supported by way of its/their other end on a head plate which is preloaded by way of a second spring, wherein the second spring exerts a spring preload on the one or more actuators; and - a valve piston head is in engagement with the head plate by virtue of the valve piston being led through a bore of the head plate and the valve piston head being connected, on the side situated opposite the one or more actuators, to the valve piston.