Suction air controlling device for use in e.g. rotary printing press, has valve with input side that is in communication with ambient air, mixing chamber disposed in housing of valve, and filter connected upstream of valve

摘要

The device has a supply line connected between a load and a positive and negative pressure source. A rotary valve (43) makes different positive and negative pressure levels, where the valve is connected as a bypass parallel to the supply line. The valve has an input side that is in communication with an ambient air. A mixing chamber (47) is disposed in the housing of the valve. A filter is connected upstream of the valve.