Air Pressure

• Don't use more atomization pressure than necessary. Start with the lowest inlet pressure recommended by the paint manufacturer. Excessive pressure creates more overspray and paint transfer is less efficient. To fine-tune air pressure, install an optional DeVilbiss air gauge at the sprayer handle. Trigger the spray gun and adjust air pressure to 10 psi or less before each use.
  
  

Pressure Drops

• Elimination of pressure drops is more critical for HVLP sprayers like the EXL-520S than for conventional sprayers. Pressure drop from smaller-diameter hoses is excessive, particularly in long hose lengths.To prevent pressure drop or variations, use at least five-sixteenths-inch diameter air supply hose. If quick-connect fittings are installed in the air hose, make sure they are approved for HVLP use.
  
  

Paint Prep

• Mix and prepare paint according to manufacturer's instructions. Strain the paint before use through a No. 60 or No. 90 mesh screen.
  
  

Paint Flow

• Spray a test area first and evaluate the results. Adjust the paint flow for even application of atomized paint across the entire spray pattern. Excessive paint flow rates will appear as heavy center spray patterns. A split spray pattern may result if paint flow is inadequate. For finer atomization of the paint, increase the inlet pressure of the gun. Modify the paint flow by turning the fluid adjustment screw.
  
  

Paint Clogs

• Clean clogs from the air cap or paint passages using only soft-tip instruments such as wooden toothpicks or broom straws. Use of wire or metal instruments may scratch or alter the precision tolerances of the paint passages, resulting in a deformed spray pattern. Never immerse the spray gun in solvent.