Devilbiss...HVLP vs. PLUS
Devilbiss...HVLP vs. PLUS
Fleet Mechanic
Joined: Aug 2007
Posts: 1,836
Likes: 261
From: Piney Woods of East Texas
I'm using a old DeVilbiss older pot tank HVLP gun with a 90% eff rating. I have both fluid tips for it. It can spray the heavy as well as the light. I spray a lot of wood Lacquers, thin material. The Devilbiss sprays it with no problem, thinned or not. Sprayed in the 5-6psi air cap pressure. If you not getting a smooth surface your gun is not set right for your material. Being a pressure feed pot, I have more control of the fluid being sprayed. Where with a top or bottom feed you are fixed. But you must be with in a certain oz/min rate or you over atomize the material and it will flash before hitting the surface. With most all guns you do not want to go over the design inlet pressures. I know some do it, with the std gun I a have sprayed with 75 psi. But with HVLP guns the air cap are design for a set pressure. I have found going over on my HVLP just made thing worst.
I'm bias toward DeVilbiss, but thats way I have used the most. The Plus is the higher efficent gun. Also requires more air, depending on air cap.
I'm bias toward DeVilbiss, but thats way I have used the most. The Plus is the higher efficent gun. Also requires more air, depending on air cap.
Fleet Mechanic
Joined: Aug 2007
Posts: 1,836
Likes: 261
From: Piney Woods of East Texas
I feed my air regulator with a 1/2" line. Off the regulator I use a 3/8" line (<20') to feed the pot tank/regulator/gun. If you use quick disconnects, make sure you use a full flow type. If you have 1/4" connections you have a 3/16" OD fittings restriction your air flow. This is a common overlooked mistake. Most only look at the hose size.
On DeVilbiss web site they should have a chart showing pressure drop vs distance for different hose sizes.
I also use 2 stage regulators to have a very stable air delivery. Along with 3 water seperators and filters. My gun requires 18cfm, delivers a 9" fan.
On DeVilbiss web site they should have a chart showing pressure drop vs distance for different hose sizes.
I also use 2 stage regulators to have a very stable air delivery. Along with 3 water seperators and filters. My gun requires 18cfm, delivers a 9" fan.
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Post Fiend
Joined: Dec 2003
Posts: 6,658
Likes: 4
From: "Islander"
After testing different HVLP guns I ended up with a C.A. Technolgies T3 gun.
www.spraycat.com Made in USA plus good phone support.
Instructions show a maximum 43 psi at the gun, this gun has high pressure at the cap like the old siphon gun, atomizes fine plus EPA compliant. Top feed, 13 cfm with 11" fan.
I ordered it with a 2.2mm nozzle to spray thinned laytex primer and semigloss interior trim paint, works great plus have 1.3 and 1.5mm nozzles for automotive painting that also works great.
Yes I would buy another C.A. Technolgies if I needed a second gun, only thing I changed was the factory needle spring for a weaker one for a softer trigger.
I purchased this gun thru a company in southern Calif I recall Spray World or something like that for $178, high end models with stainless fluid passages your at $400.
www.spraycat.com Made in USA plus good phone support.
Instructions show a maximum 43 psi at the gun, this gun has high pressure at the cap like the old siphon gun, atomizes fine plus EPA compliant. Top feed, 13 cfm with 11" fan.
I ordered it with a 2.2mm nozzle to spray thinned laytex primer and semigloss interior trim paint, works great plus have 1.3 and 1.5mm nozzles for automotive painting that also works great.
Yes I would buy another C.A. Technolgies if I needed a second gun, only thing I changed was the factory needle spring for a weaker one for a softer trigger.
I purchased this gun thru a company in southern Calif I recall Spray World or something like that for $178, high end models with stainless fluid passages your at $400.
Last edited by "Beemer Nut"; Oct 24, 2007 at 12:03 AM.
Fleet Mechanic
Joined: Aug 2007
Posts: 1,836
Likes: 261
From: Piney Woods of East Texas
That is not a lot of air for that much coverage. May work for light materials.
My DeVelbiss has a max of 50 psi at the gun, which it delivers 10psi to the air cap. I have a optional Aircap/tip for a 12" fan but it requires 22 cfm. Wonder if your air consumption is a mis-print. My gun has a air cap/fluid tip combo for spraying laytex. But I do not have to thin the paint because the atomization is good enough. With the water base paints coming out, my notes says the pot tank or hopper needs to be SS. I think this is a cathodic reaction thing. Al will sacrafice it's self to protect the other metals.
The bottom line what works for your painting style. If you have a lot of coverage to do the pot tanks system work a lot better and remove all of the weight (paint) from the gun, less fatigue. Beside you can spray in any direction ( up, gun on side) without spilling paint. The down side is cleaning them up, takes a little longeg with the fluid line and tank. I had a 3 gal tank that you could set a gal can inside of it. It was nice because it had a stir to keep the paint mixed up.
My DeVelbiss has a max of 50 psi at the gun, which it delivers 10psi to the air cap. I have a optional Aircap/tip for a 12" fan but it requires 22 cfm. Wonder if your air consumption is a mis-print. My gun has a air cap/fluid tip combo for spraying laytex. But I do not have to thin the paint because the atomization is good enough. With the water base paints coming out, my notes says the pot tank or hopper needs to be SS. I think this is a cathodic reaction thing. Al will sacrafice it's self to protect the other metals.
The bottom line what works for your painting style. If you have a lot of coverage to do the pot tanks system work a lot better and remove all of the weight (paint) from the gun, less fatigue. Beside you can spray in any direction ( up, gun on side) without spilling paint. The down side is cleaning them up, takes a little longeg with the fluid line and tank. I had a 3 gal tank that you could set a gal can inside of it. It was nice because it had a stir to keep the paint mixed up.
Last edited by blue68f100; Oct 24, 2007 at 08:37 AM.
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Post Fiend
Joined: Dec 2003
Posts: 6,658
Likes: 4
From: "Islander"
The cap prssure is as high as the gun inlet pressure, I thin 10% with water then add a little retarder for a automotive smooth finish as it flows out better than straight paint alone. The cfm is correct as the gun is just below the 4 hp single stage compressor while holding 80 psi.
I found that the mini regulator that came with the gun will only go to 54 psi maximum, took it apart and machined a brass .035" ring now goes to 72 psi, on the full fan when regulated 50 psi at the gun. A water / oil seperator is added 25' after the compressor with another 30' of 3/8" line to the gun. Overspray isn't an issue, a compliant gun that doesn't work for me is hence why I have this manufacture of gun. I hated the 10 pound cap pressure guns.
You sure don't want laytex in a Binks siphon model 7, I just had to know if it would spray.
I found that the mini regulator that came with the gun will only go to 54 psi maximum, took it apart and machined a brass .035" ring now goes to 72 psi, on the full fan when regulated 50 psi at the gun. A water / oil seperator is added 25' after the compressor with another 30' of 3/8" line to the gun. Overspray isn't an issue, a compliant gun that doesn't work for me is hence why I have this manufacture of gun. I hated the 10 pound cap pressure guns.
You sure don't want laytex in a Binks siphon model 7, I just had to know if it would spray.
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If money isn't an object. I'd have to suggest the Satajet Digital. I've sprayed with several different brands and the Sata just lays down a nice consistant pattern job after job especially since mine get use quite a bit. Iwata makes a great product as well, I'd have to put both in pretty much the same category of price, versatility and quality, not to take away from DeVilbiss or Sharpe(both fine products)
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