A valve with a valve housing having a first connection along a first axis, a second connection along a second axis and a valve seat which surrounds the first connection arranged in the flow path of a flow chamber. A valve part is displaceable along a movement axis such that a closure surface can interrupt and release the flow path. A motorized drive unit to displace the valve part having a valve rod with a contact element, the drive unit has a guide mechanism with an actuating element configured to rotate about an actuating axis defining an outer track. The distance of the track from the actuating axis is adjustable by a rotation of the actuating element about the actuating axis. A rotation of the actuating element of the valve part is movable so that the interruption or release of the flow path can be provided thereby.