Sep.20.2024
According to the movement mode of the controlled object, electric actuators can be divided into three structural forms: straight stroke, straight stroke, and multi-turn. Let’s discuss the various valve and damper configuration options for electric actuator types.
1. Angular stroke electric actuator
Rotary-turn electric actuators are designed for controlled objects that require rotational movement within a specific range, typically 0 to 90 degrees. This category is ideal for applications involving dampers, butterfly valves, ball valves, V valves, etc. This article discusses the two main connection methods for quarter-turn electric actuators: direct mount and base mount.
- Direct Mount: In this configuration, the output shaft of the electric actuator is connected directly to the valve stem. This direct connection ensures a more direct mechanical connection, making it suitable for certain applications.
- Base mounted: The base mounted quarter-turn electric actuator uses a ball joint and a connecting rod connection between the output shaft and the valve stem. This approach provides installation flexibility and has advantages in specific scenarios.
2. Straight stroke electric actuator
The output shaft of a linear electric actuator moves in a straight line. Therefore, this type of actuator is suitable for valves with linear motion of the valve core, excluding globe valves and gate valves. Such valves include single-seat valves, double-seat valves, sleeve valves, angle valves, three-way valves, diaphragm valves, etc.
3. Multi-turn electric actuator
The output shaft of the multi-turn electric actuator moves in a rotational manner, exceeding 360 degrees for controlled objects such as gate valves and globe valves. Multi-turn actuators are unique in their adaptability, as they can be integrated with a final drive to convert into a quarter-turn or linear-turn actuator. This feature enhances output force while reducing movement speed, optimizing performance in various operating scenarios.
This article provides a brief overview of the 3 structural forms of electric actuators, emphasizing their specific applications and the flexibility offered by different connection methods. It highlights the importance of selecting the right type of electric actuator based on the movement requirements of the controlled objects in different industrial environments.
