Reply by Bill_Steele

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Posted on Air Compressor filter/regulator & LVLP setup

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730 posts in 2614 days

#1 posted 02-22-2017 07:29 PM

I’m glad you posted this. I recently purchased a smallish compressor (IR Garagemate – 20gal/2hp) for my use in my garage (impact wrench, air ratchet, fill tires, etc.) and I would like to perhaps use it someday to spray paint/finish on woodworking projects. I’ve done a little research, but admittedly I’m a noob so take that into consideration.

With regard to the 50ft length of hose before the tool—it’s my understanding that the reason this done is to give the hot moist air in the system a chance to cool down and allow any moisture in the system to condense out. A copper pipe will provide better transfer of heat than a rubber hose. If hot condensed air (full of moisture) goes through a water trap, it will only pull out the water that has already condensed. You should build in drain leg(s) to release any moisture in the system past the compressor tank. To much moisture in the air can negatively affect air tool life and paint/finish quality.

I saw a video where a guy took an inexpensive 50ft air hose (HF) and coiled it into a 5 gallon bucket filled with ice water. This helped cool the air and condense out moisture—still need to get the condensate out of the system before the tool.

I’ve read/seen where people use an automobile AC condensor or soft copper tubing or rigid tubing to create an after-cooler. I’ve thought about maybe getting a wort chiller and trying to incorporate that into my air system.

When I’m at the point where I’m serious about the spray finishing I’ll try to figure out how much of a moisture problem I have.

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