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Airless Spray Techniques

Definition of Airless Spray:

Airless spray is a method of atomizing paint without the use of compressed air. The paint is pumped under high pressure through a supply line to an airless gun. The paint is forced at high pressure through a small opening at the front of the valve, called the orifice, or spray tip. The tip restriction (orifice) forms a spray pattern. The break-up of material into small droplets is called atomization.

Advantages of Airless Spray

1. Airless has less overspray or “bounce back” of material than air spray.

2. More efficient than conventional spray. Airless has transfer efficiency of 60% to 90%.

3. A thicker coat of material can be applied in a single pass. With the high pressure of airless spray, high viscosity materials can be atomized without costly solvent reduction.

4. Airless accommodates faster production line speeds. More paint can be applied at a heavier mil thickness.

5. Good penetration can be attained on recessed areas of work pieces.