What is a quarter-turn actuator?

The quarter-turn actuator is an electric device that controls the valve from 0 to 90 degrees. The angular travel of 0~90° is used to control the angular stroke valve such as ball valve, plug valve, butterfly valve and louver valve. The function of the angular stroke electric actuator is Receiving the standard value galvanic signal of 0~10, 4~20 mA or 1~5 volts sent by the regulator or other instrument, after the actuator becomes the displacement thrust or the corner torque to operate the switch, valve, etc. Complete the task of automatic adjustment. Both actuators used to consist of a servo amplifier and an actuator. Now the organic and electronic intelligent structure, their structure, working principle and usage are similar, the only difference is an output displacement (thrust) and an output angle (torque).

Introduction
The quarter-turn actuator is an electric device that controls the valve from 0 to 90 degrees. The angular travel of 0~90° is used to control the angular stroke valve such as ball valve, plug valve, butterfly valve and louver valve. The function of the angular stroke electric actuator is Receiving the standard value galvanic signal of 0~10, 4~20 mA or 1~5 volts sent by the regulator or other instrument, after the actuator becomes the displacement thrust or the corner torque to operate the switch, valve, etc. Complete the task of automatic adjustment. Both actuators used to consist of a servo amplifier and an actuator.

the difference
Organic electric and intelligent structure, their structure, working principle and usage are similar, the only difference is an output displacement (thrust) and an output angle (torque)

Output torque
The torque required for the valve to open and close determines the output torque of the electric actuator. It is usually recommended by the user or the valve manufacturer can choose it. As the actuator manufacturer, it is only responsible for the output torque of the actuator. The torque is determined by factors such as valve size and working pressure. However, due to the difference in machining accuracy and assembly process of valve manufacturers, the torque required for different specifications of valves produced by different manufacturers is also different, even if it is produced by the same valve manufacturer. The torque of the specification valve is also different. When the torque selection of the actuator is too small, the valve cannot be normally opened and closed. Therefore, the electric actuator must choose a reasonable torque range.

PTW Quarter-turn Electric Actuator
Electrical parameter
Because the electrical parameters of different angular stroke actuator manufacturers are different, it is generally necessary to determine the electrical parameters when designing the selection, mainly motor power, rated current, secondary control loop voltage, etc., often negligence in this respect, the result The mismatch between the control system and the electric actuator parameters causes malfunctions such as working time-time tripping, fuse blowing, and thermal overload relay protection.

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