Frequently Asked Questions
What’s the difference between HVLP and conventional spray guns?
HVLP uses high air volume at low pressure, so transfer efficiency is higher and overspray is lower. Conventional runs at higher pressure give finer atomization and work faster, but waste more material. Both spray guns fit different jobs.
What air pressure should I use with an HVLP spray gun?
Most HVLP caps are limited to 10 psi. Inlet pressure is usually 15–30 psi, depending on the model and coating. Set it by the test pattern until the fan is even and the tails are gone on your paint spray guns.
What size air compressor do I need for a spray gun?
Match CFM to the tool. HVLP often needs about 7–13 CFM at around 40 psi, while LVLP can run at 3–7 CFM. A 20–60-gal tank helps with a steady flow. Check the gun datasheet before choosing a paint sprayer.
How do I choose the correct nozzle/tip size for my coating?
Use viscosity as the guide. 1.2–1.4 mm for base or clear, 1.4–1.6 mm for single stage, 1.7–2.2 mm for primers and high build. Confirm on a test panel, then fine-tune the flow and fan on the paint guns.
How do I clean and maintain a spray gun to prevent clogs and poor patterns?
Flush with the right solvent or waterborne cleaner, remove cup tip and needle, brush the passages, strain coatings, and oil packings lightly. Prompt cleaning keeps spray guns consistent. Use dedicated spray gun cleaning kits for best results.