DN20 Motorized Ball Valve 3 Way Brass 3/4in Female Thread AC 220V for Water Control System 1. METAL DRIVER: Use metal transmission parts to drive the opening and closing of valves, which can be used for on off control of heating and water supply systems.2. VALVE COMPOSITION: The motorized ball valve consists of driver and valve body, the driver adopts a synchronous motor, which has no noise and has a constant action.3. WITH SWITCH: The built in travel limit switch can make the valve power off when it is fully open or fully closed, and equipped with manual structure and is easy to adjust.4. BRASS MATERIAL: The valve body is forged brass, with sanding surface, which is resistant to wear and corrosion, not easy to deform, and has a long service life.5. WIDE APPLICATION: With equal percentage flow characteristics, 600KPA close differential pressure, widely used in heating, ventilation, air conditioning, refrigeration, etc.