This four stage air purification system includes an adjustable regulator and gauge. For maximum efficiency of the panel, the temperature of the compressed air should be 68 to 150 °F and the relative humidity of the compressed air should be greater than 20% and less than 70%. Used in applications such as painting, asbestos abatement, petroleum industries, pharmaceuticals, chemical handling and metal grinding. Versaflo™ 7100009683, Portable, For Use With: SAR System, Blue, Domestic