The invention relates to an electromagnetic switch valve (10) for opening or closing an oil or coolant circuit in a motor vehicle, having an electromagnet, which has a coil (24) and a movable armature(34), wherein the armature (34) is coupled to a valve element (40), via which a valve seat (69) in the coolant circuit can be sealed, wherein the switch valve (10) is designed to be pressure balanced, and the valve element (40), pointing in the direction of the valve seat (69), is designed to be at least approximately hollow-walled.