Compressed air at 40 bar is used to blow the PET bottle. Any oil in the air creates a health hazard and affects the taste and smell of your products. At the same time, air at 7 bar controls valves and actuators for blowing, filling, capping, labeling and packaging. Oil in the air builds up in these components causing jamming and stoppage. In addition, instruments that continuously vent out oil-contaminated air could compromise the quality of final products.