TOYI series actuator can receive the 4～20mADC or the 1～5VDC control signal and the 220VAC power supply from the computer or the industrial instrument directly, then carry on PID adjustment for the actuator drive motor according to valve position feedback signal and deviation to achieve precise positioning of the opening of valves that supporting the actuator or other devices and output 4～20mADC position feedback signal. Its core electronic control unit—servo controller can adapt to modern digital technology, it sets the signal acquisition, processing, feedback control in one according to DCS / PLC specification. The original electronic braking circuit and mechanical damping device can stop the motor immediately and locate without convulsion, the location accuracy can up to 0.3%. SCR output has the advantages of fast, stable and high reliable. This kind of valve is particularly suited to the occasions that the media are viscous, containing particles and fiber for it is small, light, reliable, simple matched and supporting large flow capacity. At present, it is widely used in industrial control coefficient in food, environmental protection, light industry, petroleum, paper, chemicals, teaching and research equipment, and electric power industries.