Electric Butterfly Valve, Electric Ball Valve, Electric Control Valve manufacturer / supplier in China, offering Pcu Proportional Control Motorized Actuator for Waste Water Treatment, Quick Open Straight Connection on/off Electric Actuator with Motorized Valve for Chemical Factory, Abrasion-Resistant Flange Connection Heavy Duty V-Notch Ball Valve Low-Torque Electric Actuator for Sludge Control and so on.