What is a Multi-Turn Electric Actuator?

How Does a Multi-Turn Electric Valve Actuator Work?

The basic working principle of a multi-turn electric valve actuatoris to convert an electrical signal to movement. When a command signal is sent to the Actuator by a control system or manually by an operator, the motor inside the Actuator begins to turn to produce torque. The torque produced by the actuator's motor applies force to the stem or gear mechanism connected to the valve and enables the valve to either open or close or to modulate depending on the required operation of the valve.

Multi-turn Pneumatic Actuators use compressed air to produce movement; however, multi-turn electric actuators use electricity to activate their motors and provide a much more precise and accurate method of controlling the opening and closing of valves and are capable of being controlled remotely. They are also compatible with current automation systems.

Key Benefits of Multi-Turn Electric Actuators

Multi-turn electric actuators are highly reliable, efficient, and well-suited for applications requiring critical control of valves.

• High Torque Output and Durability: Able to withstand and drive heavy loads for many rotations without degrading performance.
• Lower Energy Consumption: Electric actuators also use less energy than any actuator type, including hydraulics.
• Greater Operational Accuracy: Provides a high degree of accuracy to control the operation of valves in an automated system.
• Safety Features: Many electric actuators are equipped with fail-safe mechanisms, indicator alarms, and diagnostic features for enhanced operational safety and reliability.
• Compatibility: They integrate easily with digital feedback systems and IIoT platforms.

Uses of Multi-Turn Electric Actuators

The versatility of multi-turn electric actuators makes them extremely important in many different industries. Here are some examples of where multi-turn electric actuators are commonly used.

• Water Treatment Applications: Multi-turn electric actuators control the operation of gate valves for water treatment applications such as filtration and wastewater treatment.
• Oil and Gas Applications: Multi-turn electric actuators control the operation of large valves used in petroleum refinement and pipelines.
• Power Generation Applications: Multi-turn electric actuators control steam valves, cooling systems, and many other aspects of a power plant.
• Chemical Processing Applications: Multi-turn electric actuators control the flow of liquid and gases in chemical reactors and mixers.
• HVAC Applications: Multi-turn electric actuators control the flow of air in the duct work of HVAC (heating, ventilation, and air conditioning) systems.

Frequently Asked Questions: Common Questions Regarding Electric Actuators

What is the purpose of an electric actuator?

The primary purpose of an electric actuator is to automatically control the operation of mechanical equipment such as valves, allowing fast, accurate remote control without the need for physical input from a person. Multi-turn electric actuators help improve process efficiency of industrial processes.

Are multi-turn electric actuators superior to non-electric actuators?

Although pneumatic and Hydraulic Actuators also provide distinct benefits with regard to specific applications, multi-turn electric actuators tend to be preferred due to their high level of accuracy (positioning and travel), low maintenance needs and ability to integrate into digital control systems.

Is it possible to run a multi-turn electric actuator in harsh environments?

Yes. In fact, many multi-turn actuators have been purposefully built for use in harsh conditions including but not limited to being exposed to the outdoors/elements, harsh chemicals, and high pressure. Both the actuator casing and internal parts' construction are designed to deliver durability and to reliably operate under high-stress conditions.

How Do Pneumatic Multi-Turn Actuators compare with Electric Actuators?

Pneumatic multi-turn actuators use compressed air to create movement so they will work well where electric hazards exist; however electric actuators provide more accurate movement, more torque options and tend to allow for easier maintenance compared with Pneumatic Actuators.

Selecting Your Multi-Turn Electric Actuator

When selecting a multi-turn electric actuator to fit your needs take into account the actuator's torque requirements, work environment, what type of valve will be used and how well the energy source used to power the actuator will integrate into your control system. In addition, look for actuator certifications such as ISO compliance as evidence that they meet industry (and your) standards.

Partnering with a reputable manufacturer is also important. A manufacturer with experience in your industry will provide you with technical assistance, will work with you to customize the actuator and will provide you with timely service to help you achieve maximum efficiency and highest performance from the actuator over its entire service life.

Conclusion

The use of a multi-turn electric actuator is essential for successfully automating industrial processes, as they provide exceptionally precise and reliable performance for critical applications. Whether controlling water supply to a treatment plant or using them to manage the flow of fuel through a pipeline in the oil/gas industry, these actuators are vitally important for effective and efficient operation in challenging environments. Knowledge of these actuators' function, benefits, applications and differences from other types of actuators will help prospective purchasers make the best decision to satisfy those needs.