Oil and Welding Smoke Filter collects contaminants with electro statically range of airflows from 1000 - 8500 M3 hr. Unit. The Smoke Filter offers three-stage filtration to improve collection efficiency at every stage. The Smoke Filter is equipped with a prefilter that removes larger mist droplets, metal dust and swarf captured by the collector at the first stage and in the second stage, a two stage electrostatic precipitator is used for smoke extraction. Oil and Welding Smoke Filter comes with electrostatic air cleaners and mechanical filters which are an effective range of mechanical, electrost and cartridge filters.