Device for regulating the flow of a fluid, comprising - a valve housing with at least two valve ports, wherein in the valve housing at least one fluid path is formed, which extends between the at least two valve ports, - at least one valve seat, which is assigned to the at least one fluid path, - a valve member with a closing body , which can be coupled to the at least one valve seat to block or release the at least one fluid path, and - an actuating unit for actuating the closing body , wherein the valve member further comprises an actuation section , which is connected via at least one connecting web (516, 518; 616, 618) with the closing body for moving the closing body , wherein a surrounding seal extends between the closing body and the actuation section , which separates the closing body and the actuation section from one another, wherein a central plane is defined at least by a planar extension of the seal , and wherein the at least one connecting web (516, 518; 616, 618) is arranged such that the closing body is pivotable upon actuation of the actuation section by the actuating unit to move the valve member and thus the closing body relative to the at least one valve seat, wherein the valve member is arranged to minimize, during the movement of the closing body , deformations in a passage area of the seal through which the at least one connecting web (516, 518; 616, 618) extends, and wherein the valve member is pivotable about a pivot axis upon the actuation by the actuating unit, characterized in that the pivot axis is offset towards the central plane through the seal , so that the pivot axis lies in or close to the central plane through the seal , in that the pivot axis and a longitudinal axis through the connecting web (516, 518; 616, 618) are aligned with one another, and in that at least the actuation section or the connecting web (516, 518; 616, 618) comprise a portion having a cranking or a notch to bring about the offset of the pivot axis . - a valve housing with at least two valve ports, wherein in the valve housing at least one fluid path is formed, which extends between the at least two valve ports, - at least one valve seat, which is assigned to the at least one fluid path, - a valve member with a closing body , which can be coupled to the at least one valve seat to block or release the at least one fluid path, and - an actuating unit for actuating the closing body , wherein the valve member further comprises an actuation section , which is connected via at least one connecting web (516, 518; 616, 618) with the closing body for moving the closing body , wherein a surrounding seal extends between the closing body and the actuation section , which separates the closing body and the actuation section from one another, wherein a central plane is defined at least by a planar extension of the seal , and wherein the at least one connecting web (516, 518; 616, 618) is arranged such that the closing body is pivotable upon actuation of the actuation section by the actuating unit to move the valve member and thus the closing body relative to the at least one valve seat, wherein the valve member is arranged to minimize, during the movement of the closing body , deformations in a passage area of the seal through which the at least one connecting web (516, 518; 616, 618) extends, and wherein the valve member is pivotable about a pivot axis upon the actuation by the actuating unit, characterized in that the pivot axis is offset towards the central plane through the seal , so that the pivot axis lies in or close to the central plane through the seal , in that the pivot axis and a longitudinal axis through the connecting web (516, 518; 616, 618) are aligned with one another, and in that at least the actuation section or the connecting web (516, 518; 616, 618) comprise a portion having a cranking or a notch to bring about the offset of the pivot axis . <EOS>