Figure 8-7.  Airless spray gun. Figure 8-5.  Gravity-feed spray gun. Figure 8-4.  Siphon-feed spray gun.  Figure 8-6.  A high volume low pressure (HVLP) spray gun.  Airless spraying does not directly use compressed air to  atomize the coating material. A pump delivers paint to the spray gun under high hydraulic pressure (500 to 4,500 psi) to  atomize the fluid. The fluid is then released through an orifice  in the spray nozzle. This system increases transfer efficiency  and production speed with less overspray than conventional  air atomized spray systems. It is used for production work  but does not provide the fine finish of air atomized systems.  [Figure 8-7] percent and upwards of 80 percent of the finish material to  the surface. HVLP spray guns are available with a standard  cup located underneath or in a gravity-feed model with the  cup on top. The sample shown can be connected with hoses  to a remote paint material container holding from 2 quarts  to 60 gallons.  [Figure 8-6] Because of more restrictive EPA regulations, and the fact that  more paint is being transferred to the surface with less waste  from overspray, a large segment of the paint and coating  industry is switching to HVLP spray equipment.  8-8