Basis For Selecting An Electric Actuator

Basis For Selecting An Electric Actuator

Date:Mar 01, 2019

How to choose the electric actuator correctly in many types, sometimes it is annoying to choose the product that is not suitable for your busy schedule, and provide you with the basis of electric actuator:


1. Operating torque The operating torque is the most important parameter for selecting an electric actuator. The output torque of the electric device should be 1.2 to 1.5 times the maximum torque of the valve.

2. There are two types of mainframe structures for operating thrust electric actuators: one is to configure the thrust disc without directing the thrust disc; the other is to configure the thrust disc, and the output torque is converted into the output thrust through the stem nut in the thrust disc. Last year, the total import and export volume of the electric valve industry reached US$24.1 billion, a year-on-year increase of 28.2%. The total export value was US$22.4 billion, a year-on-year increase of 29.3%; the total import value was US$201.34 billion, a year-on-year increase of 27%. With the recovery of the world economy, the import and export of Wenzhou valve products has also increased. However, due to the large gap in high-end technology compared with foreign manufacturers, product technology will become a constraint on the development of Wenzhou electric valve products in the future. A bottleneck.

3. Determine electrical parameters based on the selected electric actuator

Because the electrical parameters of different electric 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, result control The system does not match the parameters of the electric actuator, causing faults such as working time-time tripping, fuse blowing, and thermal overload relay protection to take off.

4. Determine the output torque of the electric actuator according to the torque required by the valve.

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.

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