The Electric Actuator Butterfly Valves is used as the gas medium to regulate the flow or cut off device in the dust cold wind or hot air pipe of the ventilation and environmental protection engineering in gold, chemical, building materials, power plant, glass and other industries. This valve is used as a gas medium to regulate flow or cut off as a gas medium in the dust cold air or hot air pipes of the ventilation and environmental protection projects in the industries of gold, chemical, building materials, power plants, glass and other industries.