What is the Difference Between Quarter Turn and Multi-Turn Actuators?

Actuators are essential components in various industries, responsible for converting energy into mechanical motion. When it comes to valves and control systems, two common types of actuators are quarter-turn and multi-turn actuators. Understanding the differences between these two types of actuators is crucial for selecting the right one for specific applications. In this article, we will explore the distinctions between quarter-turn and multi-turn actuators, shedding light on their unique characteristics and typical use cases.

Quarter Turn Actuators: Swift and Precise

Quarter-turn actuators, as the name suggests, are designed to rotate a valve or a device by a quarter of a full circle, typically 90 degrees. They are known for their swift and precise operation, making them ideal for applications where quick on-off or proportional control is required.

Characteristics of Quarter Turn Actuators:

Rapid Operation: Quarter-turn actuators are capable of swiftly opening or closing a valve, making them suitable for processes that demand quick response times.

Limited Travel: These actuators are designed for applications that require a valve to move through a 90-degree rotation, and they are not suitable for applications that require more extensive movement.

Simplicity: Quarter-turn actuators are often more straightforward in design compared to multi-turn actuators, which can simplify installation and maintenance.

Common Applications for Quarter Turn Actuators:

Ball valves

Butterfly valves

Plug valves

Dampers

HVAC systems

Process automation

Multi-Turn Actuators: Precision Over Extended Travel

Multi-turn actuators are designed to rotate a valve or a device through multiple revolutions, providing precise control over a more extensive range of motion. They are favored for applications that require fine adjustments and positioning.

Characteristics of Multi-Turn Actuators:

Extended Travel: Multi-turn actuators can provide several complete rotations, allowing for precise control over the valve's position.

High Precision: These actuators are well-suited for applications where precise control and accurate positioning are critical.

Slower Operation: Multi-turn actuators typically have a slower operation compared to quarter-turn actuators due to the extended travel required.

Common Applications for Multi-Turn Actuators:

Gate valves

Globe valves

Control valves

Water treatment systems

Oil and gas pipelines

Industrial automation

Selecting the Right Actuator:

When choosing between quarter-turn and multi-turn actuators, several factors come into play:

Application Requirements: Consider the specific requirements of your application. If you need swift, on-off control, quarter-turn actuators may be suitable. For precise positioning and control, multi-turn actuators are a better choice.

Valve Type: The type of valve or device you are operating will also influence your choice. Quarter-turn valves, such as ball valves, are a natural fit for quarter-turn actuators, while gate valves and globe valves often require multi-turn actuators.

Environmental Conditions: Assess the environmental conditions in which the actuator will operate. Factors such as temperature, humidity, and exposure to corrosive substances can impact the choice of actuator.

Maintenance and Longevity: Consider the maintenance requirements and expected lifespan of the actuator. Some applications may benefit from the simplicity of quarter-turn actuators, while others may prioritize the durability of multi-turn actuators.

Conclusion

In summary, the choice between quarter-turn and multi-turn actuators depends on the specific needs of your application. Quarter-turn actuators offer swift operation and are suitable for applications that require quick on-off control. Multi-turn actuators, on the other hand, provide precise positioning over an extended range of motion, making them ideal for applications where accuracy is paramount.

If you have questions about selecting the right actuator for your application or require a reliable supplier of actuators and control systems, please feel free to contact us. We are here to provide you with the information and support you need to make informed decisions and ensure the success of your projects. Your satisfaction and efficiency are our top priorities.