A switchable slot valve (30) for a coating system (10), for controlling the delivery of a pasty coating material is known. Said valve has a valve bore (32) which is incorporated into a valve base body (24), is oriented in a valve extension direction (4) and in which a valve control rod (40) is located. The valve control rod can be rotated in order to switch between a conducting position and a closing position and is mounted in the valve bore (32) by means of bearing surfaces (44). To reduce malfunctions caused by coating material entering a bearing gap between the valve bore (32) and the bearing surfaces (44), according to the invention depression regions (46) are provided on outer peripheral surface sections (44a, 44b) between the slot-shaped channel inlet (42a) and the slot-shaped channel outlet (42b), in the vicinity of which depression regions the respective outer peripheral surface section (44a, 44b) does not lie against the inner peripheral surface (34) of the valve bore (32). Said valve can be used in particular in battery production for the application of coating materials containing electrochemically active particles.