Abstract: A control device for paint spraying systems and application systems which are used, in particular, for the quick-change application of paint in batch productions, with a piping system (1) carrying fluids, such as paint, lacquer, coating particles, and solvents of different cleanliness classes, with individual separating elements, such as pigs (15), enabling a fluid separation inside the piping system (1), is characterized in that individual control blocks (19, 21, 63) of the control device are composed of a plurality of actuatable switching valves (23, 25, 45, 47, 86, 87, 89, 90, 91), which enable, on the one hand, the input and/or output of pigs and/or, on the other hand, for this purpose, the simultaneous conveying of fluids in the piping system (1).