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Antique Tractor Paint and Bodywork

PAINT GUN GUAGE

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PWB

02-26-2004 10:04:26




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IS IT IMPORTANT TO HAVE A GUAGE ATTACHED TO THE PAINT GUN? WHAT WILL THIS GUAGE TELL ME AND HOW DO I READ IT. IN OTHER WORDS WHAT SHOULD I KNOW ABOUT USING THE GUAGE. THANKS, PAT




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Rod (NH)

02-26-2004 16:25:47




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 Re: PAINT GUN GUAGE in reply to PWB, 02-26-2004 10:04:26  
Hi Pat,

Yes, I think it is important to have a pressure gage right at your gun inlet. I don't know how you can properly adjust the air pressure without one. Check out this previous post of mine to see if it helps. If you are not using an HVLP gun, check out the tech sheet on the paint product you are using. That will give the recommended pressure at the gun. For HVLP the paint tech sheets will always(?) say 10 psi "at the cap" because it is a legal requirement. The pressure at the cap is not the same as the pressure at the gun inlet. You will have no way of measuring it (at the cap) without specialized test equipment. The actual pressure at the gun is determined by the gun manufacturer (not the paint manufacturer) in order to comply with HVLP. Non-HVLP guns with enamels usually use between 40 and 60 psi at the gun, as determined by the paint manufacturer.

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Ed

03-08-2004 14:24:20




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 Re: Re: PAINT GUN GUAGE in reply to Rod (NH), 02-26-2004 16:25:47  
You do need an air guage at the inlet of your spray gun, being high pressure or HVLP. The Pressure setting is not the static pressure but the pressure while the gun is in operation. The best pressure is the lowest needed to get a good fan pattern without paint bouncing back off the surface - overspray. all this is dependent on your spraygun, type of paint you are using and the paint viscosity (how thin is the paint). You'll have to find what works best for your equipment. That is why spray painting is an art. My grandfather was a spraypainter for an appliance factory and worked on cars for a second income. These are his words of wisdom... get to kwon your gun and the paint and never change from it.

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