Ruian City Hongchang Industry Control Equipment CO., LTD, established in 2005, is a professional company that integrates machinery production, research and development, and sales of electrical equipment. We are the leading manufacturer and expert on Corona Treater, Magnetic Powder Brake&Clutch, Tension Controller, Static Eliminator, etc., with 18-year OEM &ODM experience. Hongchang Company independently developed HW series Corona Treatment, adopting PDM high voltage power supply technology with advanced international standards, has gained a very good reputation from many customers.