In industrial automation, electric actuators play a critical role in enabling precise control of valves and mechanical devices. Among the various actuator types, quarter-turn actuators and multi-turn actuators are the two most widely used categories. Understanding their differences is essential for selecting the right solution for applications in industries such as oil & gas, chemical processing, water treatment, HVAC, power generation, and new energy.
Quarter-turn actuators—also known as rotary or 90-degree actuators—are specifically engineered to rotate valves or mechanisms from 0° to 90°.
They are commonly matched with:
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Ball valves
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Butterfly valves
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Plug valves
Their compact structure, fast action, and simple operation make them ideal for on/off and modulating control. Thanks to their straightforward mechanical design, quarter-turn models are typically more cost-effective and easier to install.
Multi-turn actuators are designed to provide multiple rotations, often several full turns, to open or close a valve. They deliver continuous rotational motion that is essential for valves requiring long travel and significant torque.
They are usually applied to:
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Gate valves
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Globe valves
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Rising stem valves
Because multi-turn actuators must handle higher mechanical loads and longer stroke requirements, they often incorporate advanced gearing, torque protection, and precise position control.
| Feature | Quarter-Turn Actuator | Multi-Turn Actuator |
|---|---|---|
| Movement Angle | 90° rotation | Multiple full rotations |
| Typical Valves | Ball, butterfly, plug | Gate, globe, rising stem |
| Structure | Compact | More complex |
| Torque & Travel | Short travel, moderate torque | Long travel, high torque |
| Application | Fast on/off, general control | High-load, precise positioning |
Selecting between a quarter-turn and a multi-turn actuator depends mainly on valve type, required torque, and operating conditions. A correct match not only improves system reliability but also enhances energy efficiency and safety.
As automation continues to expand across global industries, understanding actuator types becomes increasingly important. Whether for pipeline management, process control, or intelligent plant systems, choosing the right actuator ensures stable and efficient operation throughout the entire lifecycle of industrial equipment.
About us
DCL is a leading manufacturer specializing in the research, development, and production of electric actuators and intelligent flow control solutions. With a strong commitment to innovation, reliability, and precision engineering, DCL products are widely applied in oil & gas, chemical processing, water treatment, HVAC, power generation, new energy, shipbuilding, and general industrial automation.