Harbor freight hvlp spray gun setup

With the gun about 6 to 8 inches from a test surface I use the garage door or better yet some sheet rock, or masking paper move the gun across the surface about 6 to 8 inches from the surface and pull the trigger. Fluid Control: Next after getting the fan the right size continue spraying and adjust the fluid volume at the back of the gun for the final adjustment to get the fluid right for the gun speed how fast you sweep it across the work.

You want to be laying on the paint at a pretty good volume, but not causing runs at a normal gun sweep speed. Changing the pressure to match spec sheets: Now you're ready to paint and with 50 psi at the handle the gun is spraying about 10 psi at the cap.

You can't actually see the pressure at the cap which is what the spec sheets are referring to. The gun is internally regulating the pressure down based on the inlet pressure. Some expensive guns have a gauge off the back of the handle that tells you the cap pressure and then they also have a regulator and gauge at the bottom of the handle like this gun that regulates the pressure into the gun.

Painting: Look at what your painting and the way the paint is going on the surface right behind the gun and adjust from there. You will also have to greatly shut the fluid volume down at the back of the gun clockwise at the same time to avoid runs.

I usually turn the air pressure at the regulator on the handle down to around 25 to 35 psi to do spot work like this. Proper Pressure: Remember you need a high air pressure Set as the spec sheet calls for so that you get proper atomization and so you can turn the volume up. The higher pressure will actually mean fewer runs since the atomization is better. Now is the time to adjust the fan control. The topmost knob that you see on the gun is the Fan Control. Just switch the orientation of the fan depending on the type of paint that you are using.

If the Knob is in, you will be able to make dots or lines of paint. In case the Knob is out, then you will get a wide coverage panel. Thus, if you are painting a smaller or larger surface, adjust the knob accordingly. Once you have adjusted the above knobs, now is the time to adjust the paint volume. The paint volume knob will be present just below the fan control knob.

This knob will be helpful in making space for the needle to back out thus creating space for the paint inside the gun. The more you take the knob out, the more space will be available for the paint. We recommend you to screw the knob out slowly till you get an opaque coverage of the paint.

That was it all. Just take it and start painting! If you want to paint a small object, you need to make sure that the fan control knob is all in before you start spraying. This fan control knob when in, will give a smaller spray coverage which is ideal if you are painting small objects. If the paint droplets are too large, then this means that the air pressure in your spray gun is very low.

Increase the air pressure and then check the size of the droplets. 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.

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.

Now screw the material knob usually the second one down in lightly until it seats. 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 inches long. Your Thoughts Cancel reply. We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits.

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