Project Car Tips and Tricks
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Pressures And Fans
There are a lot of knobs and dials on a paint gun to mess with, and it's easy to get carried away fiddling with them too much. Here's how to dial in your gun. As the infomercial goes, you can set it and forget it.
There are only a few things you can control on a spray gun: how much air goes into it, the pressure of the air as it enters, what the shape of the air looks like as it exits the gun, and how much paint flows out of the gun. To explain this further, we'll identify the parts of a High Volume Low Pressure (HVLP) spray gun.
(A) Paint cup
(B) Pressure cap
(C) Trigger
(D) Fan adjustment knob
(E) Needle adjustment and jam nut
(F) Air volume adjustment knob
(G) Air hose fitting
(H) Air pressure regulator
(I) Air filter
Inside the pressure cap are the following components:
(A) Pressure cap
(B) Fluid tip
(C) Needle
(D) Return spring
(E) Needle adjustment and jam nut
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This is a gravity feed spray gun. The paint cup screws to the top and paint drops down int
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You can control how much paint flows out of the gun by changing the size of the needle and
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With the fluid tip installed, install the needle, spring, and needle adjustment knob. Hold
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The needle blocks the air and paint passages at different places inside the gun, so you ca
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