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Need help with HVLP gun

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rvator(at)lindonnet.com
Guest

Posted: Wed Jan 11, 2006 4:10 pm Post subject: Need help with HVLP gun



I got a new HVLP gun (Alltrade from Costco) and attempted to use it this

weekend to prime some parts for my ailerons. Unfortunately, I could not get

a good spray pattern out of it. It seemed no matter what I tried, it would

only spray a very week, splattery pattern - the paint did not atomize very

well at all. I'm using AFS water-based primer, BTW. Pressure was at 40

psi, then increased to 45 (the gun says use max of 43). I did not thin the

primer because I've had good luck spraying it straight out of the bottle in

the past with my high-pressure touch-up gun. I ended up finishing the job

with my old gun, which does a good job, but I was hoping to significantly

reduce the overspray and amount of paint vapor in the air (and wasted

paint).

The little pamphlet that came with the gun was of little help; I tried its

recommendations for changing the flow and pressure. Anybody here have

experience with a top-feed HVLP gun that could give me some pointers?

Thanks much,

Bob Smith

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Bret Smith

Joined: 09 Jan 2006
Posts: 178
Location: Mineral Bluff, GA

Posted: Wed Jan 11, 2006 6:52 pm Post subject: Need help with HVLP gun



Bob, you will need to thin the primer or get a different nozzle that has a

larger orifice.

Bret Smith

Mineral Bluff, GA

www.FlightInnovations.com

--

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_________________
Bret Smith
RV-9A (Emp)

Daniel.Snow(at)wancdf.com
Guest

Posted: Thu Jan 12, 2006 5:17 am Post subject: Need help with HVLP gun

Bob, I have a similar setup and called AFS when I had the same problem.  They instructed me to do two very important things: 1) Increase air pressure such that you maintain the required air pressure at the gun with the trigger pulled continuously.  That may mean turning the pressure up to 50-60 psi at the tank.

2) Thin, thin, thin.  I don't have a viscosity cup, so the guy at AFS told me to thin it up to about 2 parts paint to 1 part water.



Of course you probably already know to just barely fog the pieces with the first pass, wait 3-5 minutes and lightly spray in the perpendicular direction, wait 3-5 minutes and lightly spray, etc.



I don't have the numbers here at work, so I suggest you call AFS.  The owner is very friendly and willing to spend time explaining how to use his products.



Good luck.



Daniel Snow

RV-9A wings finished, waiting for slow-build fuse

Jacksonville, AL



Time: 04:10:54 PM PST US

From: "Bob Smith" <rvator(at)lindonnet.com>

Subject: Need help with HVLP gun






I got a new HVLP gun (Alltrade from Costco) and attempted to use it this

weekend to prime some parts for my ailerons.  Unfortunately, I could not get

a good spray pattern out of it.  It seemed no matter what I tried, it would

only spray a very week, splattery pattern - the paint did not atomize very

well at all.  I'm using AFS water-based primer, BTW.  Pressure was at 40

psi, then increased to 45 (the gun says use max of 43).  I did not thin the

primer because I've had good luck spraying it straight out of the bottle in

the past with my high-pressure touch-up gun.  I ended up finishing the job

with my old gun, which does a good job, but I was hoping to significantly

reduce the overspray and amount of paint vapor in the air (and wasted

paint).



The little pamphlet that came with the gun was of little help; I tried its

recommendations for changing the flow and pressure.  Anybody here have

experience with a top-feed HVLP gun that could give me some pointers?



Thanks much,



Bob Smith

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Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

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LarryRosen

Joined: 16 Jan 2006
Posts: 415
Location: Medford, NJ

Posted: Mon Jan 16, 2006 8:43 am Post subject: Need help with HVLP gun

Here 

<http://purplesagetradingpost.com/sumner/techinfo/HVLPspraygun.html> is 

a link to some HPLV spray gun set up tips.  It is for Harbor Freight  

HPLV spray guns, but it may help.



Larry Rosen

RV-10 #40356

<http://lrosen.nerv10.com>

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_________________
Larry Rosen
#40356
N205EN (reserved)
<http>

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