This is similar to a conventional spray gun using a compressor to supply the air, but the spray gun itself requires a lower pressure (LP). A higher volume (HV) of air is used to aerosolise and propel the paint at lower air pressure. The result is a higher proportion of paint reaching the target surface with reduced [[overspray]], materials consumption, and air pollution.
A regulator is often required so that the air pressure from a conventional compressor can be lowered for the HVLP spray gun. Alternatively a turbine unit (commonly containing a vacuum cleaner derived motor) can be used to propel the air without the need for an air line running to the compressor.
HVLP turbines supply air at a much lower velocity producing a softer, easier to control spray. This allows you to lay the paint on gently and not blast it on. Benefits of HVLP include less overspray and less paint wastage. Transfer efficiency can be as high as 85%. The quality of finish is identical to the best high pressure spray finishes.