1. Product Introduction Electric ventilation butterfly valve is compose by 802 series quarter-turn electronic type actuator and ventilation butterfly. It use the same material with valve body and to processed into seal ring. Its applicable temperature and corrosion resistance depend on the material of valve body. The nominal pressureï¼?0.6Mpa, and its leakage rate controlled within 2% of the maximum flow volume. It used as ventilating and regulating the medium flow of pipeline in the industry, metallurgy, environment protection and other field. 2. Performance Feature Small driving torque, on-off flexible and easy to operating. Can effectively avoid the stuck phenomenon which caused by thermal expansion. Short structure size, light weight and easy installation. Weld by steel plate. Setting an oil sealing ring on the valve body, without any visible gap between it, and small leakage rate.