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Old 04-02-2018, 03:17 PM   #1
msg
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Air flow gauge/regulator recommendations?

Anyone have any recommendations for a air flow gauge that would attach on the paint gun? Ive see some folks who call them cheater valves and not really regulators. Im just trying to make sure Ive got some way to know how much pressure is at the gun.
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Old 04-02-2018, 07:27 PM   #2
Foot Stomper
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Re: Air flow gauge/regulator recommendations?

You should be running an air filtration unit that removes oil, dirt and water from the airline... and they come with a regulator to dial down the air pressure... problem solved!

This one is very affordable and easy to install and use.
https://www.autorefinishdevilbiss.co...trol-unit.aspx
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Old 04-02-2018, 08:51 PM   #3
72HuggerK20
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Re: Air flow gauge/regulator recommendations?

You should be running Filter/Regulator at the wall, as well as a regulator or gauge of some sort at the gun because of the pressure drop that you will experience in the air line. If you don't regulate at the gun, you can see pressure fluctuations from bends or kinks in the line, resulting in very unpredictable spray patterns. If you set your regulator on the wall to 25 psi, you will not be seeing 25 psi after it goes through 25 or 50 feet of hose. Unless your gauge is right at the inlet of the gun, there is no way you can be consistent. Just one psi difference can really change the appearance of a color, and can either make or break a blend job. Personally I like the RTI mini regulator because it has a glass gauge face so solvents won't cloud it over. It also has a 0-60 psi readout, which is a nice range for painting.
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Old 04-02-2018, 11:38 PM   #4
BIGglaSS
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Re: Air flow gauge/regulator recommendations?

Set wall regulator slightly below the compressor turn on pressure. That way, hose pressure will not fluctuate. Use a diaphragm regulator at the gun. A "cheater valve" restricts airflow to lower pressure, and is NOT what you want.

I ALSO like the RTI regulator because the 0-60 guage is easy to read:
https://www.amazon.com/RTI-Technolog.../dp/B002GK9Y1S

But, this is also an acceptable reg:
Motor Guard https://www.amazon.com/Motor-Guard-R.../dp/B0073NVA2Y
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Old 04-03-2018, 09:27 AM   #5
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Re: Air flow gauge/regulator recommendations?

Thanks guys, years ago when I got started in my restoration I got the garage set up with a compressor, a regulator filter that came with a lubricator but I dont put any oil in it. I was told that although it would lubricate tools it would just introduce oil in the paint. Looking back I would buy just the filter regulator unit. From there the air goes into a rigged up mini fridge that has a copper coil in a 5 gallon bucket with cold water to cool the air. Then it passes through the workshop area of the garage to the main area. There I have another filter dryer that then has the air hose connection point.

Both filter regulators I have kept at 110psi and have been controlling the pressure at the gun on a Devilbiss Finish line 4 gun I bought back then and it came with a pressure gauge. Most of the paints Ive shot so far are all requiring around 29-40 psi at the gun. I have probably been doing this wrong and should at least set the last air filter to be at a lower pressure, if not the required pressure for the paint tech sheet. I had thought as well that the pressure might drop by the time it reaches the gun and how the heck would I know at the gun what was going on? Much less at the tip which has me totally confused as to how to know what pressure is happening there.

Up to this point I have only been shooting epoxy primer and 2k primer and getting close for base and clear. Recently I purchased a new gun for just painting clear on a recommendation from a few folks. That new gun did not come with a gauge so I had thought to find a good reliable one and pop it on there. I did see the RTI and a 3M gauge but wanted to see which one other have had good luck with.

Heres a diagram of what I set up in the garage
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Last edited by msg; 04-03-2018 at 09:36 AM.
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