Compressed air processing device for vehicle air system

The device has a pressure regulator with an outlet valve (8), an air dryer (4) and a multi-circuit protection valve with an overflow valve (23) per circuit with limited reverse flow and at least one magnetic valve (32) for arbitrary actuation of the overflow valve. This magnetic valve is also designed as a control valve for controlling a regeneration phase and a regeneration line (36) leading to the outlet valve is connected to the magnetic valve.