Electric ball valves have a wide range of classifications, including regulating and switch type actuators with different controls, as well as electric regulating ball valves and electric switch ball valves. Electric ball valves are suitable for process applications and fluid control systems where there is a large pressure difference and strict sealing requirements for opening and cutting off pipeline media. Electric ball valve is a type of pipeline pressure component used in industrial automation process control. It is usually used for remote switching or regulating control of pipeline media. Electric ball valves mainly include various series such as electric regulating ball valves, electric explosion-proof ball valves, electric high-pressure ball valves, electric three-way ball valves, etc. The electric actuator adopts an integrated structure with a built-in servo system, without the need for additional servo amplifiers. It can be controlled by inputting 4-20mA control signals or 1-5VDC and 220VAC power supplies. Electric ball valves have the advantages of small size, lightweight, good performance, simple matching, and large flow capacity. Electric ball valves can be used for working temperatures ranging from -20 ℃ to+200 ℃ (with special sealing from+350 ℃ to+700 ℃) and working pressures ranging from PN1.6-PN42.0MPa.

Electric ball valves, electric explosion-proof ball valves, electric high-pressure ball valves, and electric three-way ball valves are mainly suitable for regulating or cutting off air, steam, water, gas, petroleum and petrochemical products, and corrosive media.

Electric ball valve actuator is an indispensable driving control device for achieving program control, self-control, and remote control of electric ball valves. Its motion process is controlled by stroke, torque, etc. Due to the fact that the working characteristics and utilization rate of electric ball valve actuators depend on the type and characteristics of the ball valve, the correct selection of ball valve actuators is crucial to prevent overload phenomena.

The output torque of the actuator is the main parameter for selecting an electric actuator, and the output torque of the actuator should be 1.2-1.5 times the maximum torque of the selected ball valve operation. Secondly, it is necessary to choose the appropriate opening and closing speed according to the different usage conditions of the ball valve, which can prevent water hammer caused by too fast opening and closing speed of the ball valve actuator.

Electric ball valve actuators have special requirements, which must be able to limit torque (axial force) and rotation angle. After the specifications of the electric device are determined, its control torque is also determined. Generally, the motor operates within a predetermined time and does not overload. But if the following situations occur, it may lead to overload:

1、 Low power supply voltage, unable to obtain the required torque, causing the motor to stop rotating;

2、 Incorrect setting of the torque limiting mechanism to exceed the stopping torque, resulting in continuous excessive torque and causing the motor to stop rotating;

3、 Intermittent use generates heat accumulation that exceeds the allowable temperature rise of the electric motor;

4、 Due to some reason, the torque limiting mechanism circuit has malfunctioned, resulting in excessive torque; The fifth reason is that the operating environment temperature is too high, which relatively reduces the thermal capacity of the motor.