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Old 09-02-2009, 03:38 PM
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Question on setting pressure on HVLP

Hi,

I have a Devilbiss Startingline gun and having some trouble setting the air.

Sheet calls for: 30 PSI INLET PRESSURE PROVIDES 10PSI AT THE AIR CAP. CONSUMES 13CFM.

The gun came with an attachable air regulator.

Does this mean that I need to set the air pressure on the dial to read 30 PSI?

Also, 30 PSI with the trigger pulled?

I'm going to shoot 2K primer with 1.8 tip, which the primer calls for 8-10 PSI.

Thanks for the help.

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Old 09-02-2009, 03:50 PM
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http://www.southernpolyurethanes.com...your%20gun.htm

Gun adjustment procedure..set your pressure at 100 psi at the wall and adjust at the gun to get it to work for you..we all have to do this with a new gun to get it right..

Sam
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Old 09-02-2009, 05:39 PM
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Thanks for the post, but that still didn't answer my original questions.
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Old 09-02-2009, 06:31 PM
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Yes that would be 30 psi at the gun with the trigger pulled.
But that is the starting point to ballpark it depending on viscosity,etc. Do a search on setting up the gun. I just used a how to from this forum yesterday and it worked excellent!


Thats 8-10 PSI at the tip, but you can't measure that. The 30 PSI inlet pressure gets regulated internally by the gun to 8-10 PSI. I could be wrong but thats how i understand it to work.


Let me know how you like the guns , I was just looking at those today.

Bob

Last edited by bobyell; 09-02-2009 at 06:37 PM.
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Old 09-02-2009, 11:25 PM
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Thanks everyone! For the most part, I was able to get it set to 30 PSI. Once the tank had time to build up enough pressure, it worked great. I guess yesterday I wasn't waiting long enough and also not pressing the trigger when setting PSI.

I mixed primer and sprayed for the first time! I tested it out and was happy from what I could tell from the test pattern, so I went for it. I sprayed the first coat and was pleased with the look. There was some orange peel, but it looked good and isn't a big deal, since it's a panel that is mostly covered by the fender. The night crept up on me and the second and third coat was shot it less light condition.

When I was cleaning the gun, I noticed that I did not swap out the 1.8 needle and only swapped out the 1.8 tip. Ooops, but I don't know the difference. I'll see the difference the next time I shoot.

I never used another gun, so can't really compare, but I was very happy how clean and easy it is to spray. Very little oversrpay... was a good experience with the Devilbiss.

I cleaned them up after use... that sucks, but you gotta do it I know. Now I need to buy some gun lube.

Thanks again!

Danny

Tomorrow I will take a picture and post it on here.
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Old 09-03-2009, 10:52 AM
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You said a little orange peel in the primer is not a big deal, but you should be using the spraying of primer to fine tune your adjustments of your gun and improving your technique. This will be beneficial when you start laying on your color and clear.

Vince
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Old 09-03-2009, 05:24 PM
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302,

Yes. I'm going to practice on a spare hood I have to get the technique down and reduce some of the orange peel, before I shoot my actual car again. Thank you.

-Danny
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