... years experience 3.Washable filter Advanced Welding Fume Extractor(CE APPROVED) 1. Patented cylindrical honeycomb Kelantechnics Soldering Fume Separation ... efficiency: above 97%, based on 2 stages of electric field (electrostatic air filter) guaranteed.3.PLC controlled ... , metal treatment, soldering, food processing industries, etc.9.CE (certificate of safety conformity) granted, UL867, UL710 and ...