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Re: Problems with paint gun

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Evan Mellott from Iowa

06-08-2013 08:17:07

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It was HVLP though. And when I used a new gun I bought (HVLP gravity feed) The paint sprayed the same way as well, splattery.

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El Toro

06-10-2013 03:56:42

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 Re: Problems with paint gun in reply to Evan Mellott from Iowa, 06-08-2013 08:17:07  
Read the manual that came with your spray gun. It should tell you what your pressure at your regulator should be. On my gun its 35psi. If you buy paint from PPG, Martin Senour or Dupont it will tell you on the paint can how much thinner to use. Hal

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Evan Mellott from Iowa

06-10-2013 08:05:15

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 Re: Problems with paint gun in reply to El Toro, 06-10-2013 03:56:42  
This gun says 20 psi max.
The Dupont tech sheet states that HVLP should be at 8-12 PSI. I know the paint was mixed correctly 8:1:2, and I had to add some more thinner because the paint was just to thick.

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Rod (NH)

06-11-2013 12:05:29

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 Re: Problems with paint gun in reply to Evan Mellott from Iowa, 06-10-2013 08:05:15  
Adjust your pressure as explained here

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06-10-2013 14:54:41

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 Re: Problems with paint gun in reply to Evan Mellott from Iowa, 06-10-2013 08:05:15  
Set it to what the gun says, the max figure is the one to use, it does not vary with the type of paint -- the pressure is reduced to about 10 psi inside the gun.

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06-08-2013 13:36:55

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 Re: Problems with paint gun in reply to Evan Mellott from Iowa, 06-08-2013 08:17:07  
10-20 psi is also too low for HVLP. The pressure should be on the gun or at least on the info that came with the gun. There is a great variation, 30-50 PSI depending on who made the gun. The correct pressure for the gun is etched in stone, you do not need to ever change it, provided you mixed the paint right. With cheap paint you might have a problem and need to adjust. However, the paint coming out of the gun is supposed to be 10 psi -- not the amount going in.

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