The SATA filter series provide particle-free, clean compressed air for professional coating. The SATA filter series for spray guns are available as one-stage sintered filters with a water and oil separator, as a two-stage combination filter with a sintered and fine filter, or as a three-stage filter unit with an additional sintered activated charcoal filter. With the SATA compressed air filters, coating flaws such as dust particle inclusions, condensate, silicone craters and thus possibly expensive rework can be avoided. The treated compressed air can be used for spraying and, when using a three-stage filter, it is also suitable for air-supplied respirator systems.