Spraying Duratex with HVLP

[jakejoseph]

I just got a 4 stage HVLP from Fuji with a #6 cap. Will it be possible to spray Duratex Spray grade with this? Sure would like to spray rather than rolling it on. The #6 aircap has a 2.2mm opening or 0.086".

[Zack Brock]

I just got a 4 stage HVLP from Fuji with a #6 cap. Will it be possible to spray Duratex Spray grade with this? Sure would like to spray rather than rolling it on. The #6 aircap has a 2.2mm opening or 0.086".

I found this info on Acrytech's site, might be helpful:

http://www.acrytech.com/store.asp?pid=14339

Use a 2½ gallon or a 5 gallon pressure pot. It must have pressure gauges to determine fluid pressure as well as air breakup pressure. Use a mimimum of 3/8” I.D. fluid pressure supply hose from the pressure pot to the gun. Maximum length for the 3/8" fluid hose is 10'.

The gun that works well is a Lynx Conventional Pressure Feed gun Model L100C. The Nozzle setup required for this product is the following:
Aircap: Part # 21-2168
Nozzle: Part # 31-2128 This information is available at www.spraycat.com
Needle: Part #40-1128

I've also used a Warwick HVLP gun with a 1.7mm needle and I like it a lot too! You can see the 868 model here http://warwick-sprayguns.com/868.html

Once the material (DO NOT THIN) is placed into the pressure pot, adjust the fluid pressure to 20-30 psi.

For the Base Coat:
For the air pressure adjustment on top of the pressure pot, use a free-flow air breakup pressure of 10 to 20 psi or greater.
For the top air fan adjustment air flow, try using a round pattern for the Base Coat.
For the trigger pull, adjust the pull to so the volume of the coating coming out is just sufficiently broken up to provide a smooth layer on the workpiece.
For the air volume adjustment (cheater valve) at the bottom of the gun handle, open it fully if your spray gun has this feature.
(Experiment to find the best settings that give you the desired texture look.)



For the Spatter Coat:
Keep all settings the same EXCEPT lower the air pressure adjustment at the gun to 5 to 10 psi with the trigger slightly pulled. That's the free-flow air pressure. Adjust the air pattern so a very slightly fan shaped pattern is produced rather than the more rounded spray pattern used for the basecoat. Notice the spatter size of the droplets produced and either reduce your trigger pull for smaller droplets or increase it for larger droplets. Increasing air breakup pressure will create smaller droplets and reducing the air breakup pressure will create larger droplets.(Experiment to find the best settings that give you the desired texture look and note those settings for future appliction.)