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How to Set Up HVLP Spray Guns
Confused on how to set up hvlp spray guns? We tell you what hvlp means, what all you need, and show you how to set it up.

Third, lets set it up!

You need to set up your gun everytime you are going to use it. Differences in humidity, temp, etc. will affect how your gun shoots that day. So let's learn how to set it up...

Tape a piece of masking paper on the wall. This is for your spray test. (It's how you set up HVLP spray guns.)

Now set your pressure at the gun inlet. Use your air regulator with gauge that you attached to the gun. You want to set it with the trigger pulled. Set it about 50 psi on the gauge to start. Your gun may have a maximum psi, but they are often on the low side. Most people usually run them from 40 psi to 60 psi. Close the air volume control knob (it's usually the one beside where the air hose enters the gun) and then with the trigger pulled, open it to the point where the air volume starts to stay the same (just listen to it) and then stop.

That should set your air pressure and volume.

Now open up your fan control knob (it's usually the top one or it's on the side) all the way and then you can turn it down a little. What you're shooting for is a fan about 6 inches tall with the gun about 6 inches from the surface. 6" at 6".

Now screw the material knob (usually the second one down) in lightly until it seats. Now unscrew it about 2 1/2 turns.

Now we're ready to test! Hold your gun at the paper on the wall like you're going to paint it. Hold it at 6 inches right now. Now what you want to do is pull the trigger all the way in for a split second then close it. You want a wide open to completely closed in one quick movement.

What you should see now is a cigar shaped pattern on the paper. Turn your fan control knob in until you get it about 6 inches tall at 6 inches from the paper.

That should set your fan control. Now leave it alone! If you change it, you change the psi at the cap. Then you would have to start all over.

Now hold your gun about 8 or 9 inches from the paper. This is the distance you want to spray at. (Your pattern will now be longer since you are farther away from the paper. It should be 8-10 inches long.) Now test it again. You should have a cigar shaped pattern with full coverage in a cigar shape in the center with fading coverage going away from the full coverage. The fading coverage you see going away from the center are what you will use to "tune" your gun. It should look something like this:
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