What is NEEDED for clean spraying air? - Hot Rod Forum : Hotrodders Bulletin Board
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Old 06-24-2011, 06:00 PM
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What is NEEDED for clean spraying air?

I'm building a small guitar paint shop (been building guitars full time for several years now but building guitars where the cleanliness didn't matter as much in the past).

Recently I need flawless whites and other light colors and I'm noticing that as far as I can tell my gun is putting foreign contaminants into the finish.

So, what I've avoided for a while... spending money on clean air.

What is needed for clean air?

Right now I have my compressor running into a HF big air filter into sloped copper air lines with drains every 15 feet or so. I have another 10 micron fuel filter (for big diesel pumps) in the booth and I have an inline 1/4" fitting red filter on my pressure pot's inlet.

I see expensive ($300+ filters made by spray gun companies). Do I need these?

Also, do I need a line dryer (refrigerated)? I drain my copper lines regularly and there usually is around an ounce of water in them when draining.

Are there hoses, regulators, or fittings/parts to avoid as far as contaminants? i.e. do I need say "Binks" hoses made for spraying or any hose will do?

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Last edited by 777funk; 06-24-2011 at 06:08 PM.
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Old 06-24-2011, 07:42 PM
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by the way here's my filter right next to the compressor (50 feet of copper line from my spray room):
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Old 06-24-2011, 09:13 PM
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That filter needs to be at the end of the 50 foot line..works better that way..also helps to have two filters..i have a water trap filter and then one of the toilet paper ones inline at the end of 100 feet of tubing and it seems to work fine..

Sam
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Old 06-24-2011, 10:29 PM
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I hear breatheable air is the best air to shoot from with all your added filters and what not. Grade G I think? Not sure but I know it has to be breatheable.
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Old 06-25-2011, 07:37 AM
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Quote:
Originally Posted by OneMoreTime
That filter needs to be at the end of the 50 foot line..works better that way..also helps to have two filters..i have a water trap filter and then one of the toilet paper ones inline at the end of 100 feet of tubing and it seems to work fine..

Sam
So do you actually use toilet paper as the filter media?
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Old 06-25-2011, 07:50 AM
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This has worked very well for me. I use a second 20 gallon tank close to where I am spraying, and feed it regulated pressure air, at about 40 or 45 psi. the air has a small water trap, and filter, before the second tank. The air inlet on the second tank is pointed down, and in the center of the top of the tank. The air outlet in on the top of the tank, at one end. Air from the hose, with any crud that made it past the filter, goes down to the bottom of the tank. Because of the volume of the tank, compared to a hose fitting, the dirt, water, and other crud cannot be picked up by the air leaving the tank, and stays in the tank.
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Old 06-25-2011, 08:57 AM
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Motor guard model M-30 filter is commonly called the toilet paper filter as it uses a paper cartridge as a filter..main thing to do is to cool the air before it reaches the filter system in order for any moisture to condense. No filter will work on water vapor.

Sam
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