Customer builds label machines. Typically they hold the label in place with vacuum generated by a squirrel cage blower then blow it onto the product when it comes into position. This application though is on a tractor/produce washer out in the farm field and the blowers do not function well. They have compressed air from the air brake system available. Using a Model 6078 3/8" (10mm) Aluminum Line Vac, they used the suction side to hold the label. On the exhaust side of the Line Vac, they installed a shutoff valve. Closing the valve causes the Line Vac to back flow. So instead of generating a vacuum, it blows on the label. The setup functioned flawlessly.