To offset this, most turbines have separate filtered intakes for spraying air and motor-cooling air. Although this warmed air all but eliminates moisture in the line, it also can cause finishes to flash-dry too quickly. ■ Because a turbine motor spins at about 20,000 rpm, it generates heat, which unavoidably warms the pressurized air. In order to be classified as HVLP, its air pressure cannot exceed 10 psi. Think of an HVLP turbine as a reverse vacuum pump: It sucks air through filters, then condenses and blows it through a hose to the gun.
