Air Driven Centrifugal Ink Pump – Proper Setup

Ensure the air is set to a minimum of 35 PSI.

Ensure there is lubrication in the air.

Centrifugal pumps run in a certain direction so make sure the direction is correct. While looking at the impeller end of the pump apply a little air pressure and then shut it off. You will be able to see the impeller direction when it slows down.

Place the pump in the container.

Hook up the discharge tube to the press inlet.

Ensure the discharge valve is open and the bypass valve is closed. This is important because you want be able to setup the right amount of flow to the press. If some of the flow is returning to the container it will give the impression that there is not enough flow. Furthermore you will be tempted to raise the speed of the air motor by increasing the air pressure. This will use more air than required to get the job done.

Open the air valve until the motor begins to turn. Allow the system to prime with ink and then check at the press to make sure you have enough ink flow.

The ink should be flowing back to the container by gravity through the return tube.

Although the manufacturer states the motor can run at high speeds immediately we are of the opinion that some running in period at a speed less than 1500 RPM is beneficial. The most important requirement by far is that lubrication must be present in the air motor. SAE 10 weight detergent oil is best.

Now open the discharge valve a little more and then open the bypass valve just a little until you see some ink returning through the bypass return line. This will keep the ink mixed while still maintaining flow to the press.

You should regularly check the viscosity. Check with the manufacturer for maximum operating viscosities.

Also check the level regularly because if it gets too low the press will run dry and also the remaining ink will get aerated.

Always clean the pump after use.

White Paper - 01/01/2007 - Author: Phil Holmes - Powerwise Ink Pumps