What pressure should I set my HVLP spray gun at?
We recommend painting between 25-30 psi while the trigger is pulled. You may see some paint tech sheets which refer to a painting air pressure of 8-10. Don’t set the spray gun to those as this measurement is referring to the air cap pressure right where the paint comes out.
How big of a air compressor do I need for a spray gun?
This is why, while you can use a 6 gallon air compressor to power a nailer, you cannot use it for paint sprayer. Paint sprayers require a compressor with a large tank, preferably from 50 gallons and above, in order to be able to keep up with the spray gun.
What does 10 PSI at the air cap mean?
It should also be pointed out that the 10 psi at the air cap is pretty much generic to all hvlp guns. That 10 psi is a MAXIMUM air pressure recommended at the air cap.
What should the pressure be on a HVLP spray gun?
In a typical HVLP design, the regulated 50 psi (345 kPa) of air supplied to an HVLP spray gun will be reduced to a pressure of no more than 10 psi (68 kPa) as measured at the air cap. In a conventional air spray gun, air cap pressure is restricted only by compressor capacity, regulator pressure and normal pressure drop conditions.
How much air pressure do you need for a spray gun?
Spray Gun Air Pressure for DIY Use Air Compressor. A 20-35 gallon (75-133 liter) air tank that pushes out anywhere from 1.5-2.0 horse power under load is a great small setup. You would be ok painting a small car or motorcycle using this tank with a LVLP spray gun. The only warning would be condensation.
Can a spray gun regulator restrict air flow?
Air regulator design can also restrict air flow and can create excessive pressure drop. Check the gauge on the regulator with both static (no flow) and dynamic (spray gun in use) conditions. If there is a pressure drop reading difference of more than 5 psi, the regulator may be too restrictive.
What causes pressure drop in a spray gun?
The following factors contribute to pressure drop in conventional air spray and HVLP (High Volume Low Pressure) systems. Just one weak point may cause a major loss of pressure. These devices are convenient, but depending on design, can be a major source of pressure drop. Ask yourself, does the application require them?
What should the air pressure be on a spray gun?
I’m referring to air pressure at the neck of your spray gun dial, and when the trigger is pulled. When spraying base coat clear coat systems, you want to spray at 26-29 PSI. You measure this PSI by pulling the trigger and letting air flow through the tip of your gun with your dial or digital readout saying 26-29 PSI.
Most HVLP spray guns will use up 10-14 scfm (air volume) at 40 psi. (Volume of air pressure per cubic foot). 10-15 psi when trigger is pulled for base coat is what most say to set your gun at. Personally I spray at about 17 psi when spraying base coat and 20-25 for clear coat using the low volume low low pressure spray guns.
How does pressure affect the nozzle of a sprayer?
Increasing pressure increases nozzle flow rate, reduces median droplet size and typically increases spray fan angle. You can watch this Exploding Sprayer Myths video to learn how pressure, boom height and nozzle spacing interact.
Where are the water filters on a spray gun?
One about 10-15 feet from your air compressor tank and one at your gun neck to keep the water out of your lines. You know the small $5 plastic water filters that you thread on the air inlet of your spray gun. We sell them at our spray gun store here. Check out our Warwick spray gun line too if you go there.
