Learn about the instrument capable of ensuring precision and efficiency for the operation of your valves.
Like other sectors, industries are constantly working to improve their processes in order to promote more agility and accuracy. In this way, the creation of technologies to promote automation in industrial daily life becomes increasingly necessary.
It is in this context that electric actuators come into play. With the aim of automating control valves – among other components – this device promotes process control.
Let's learn more about this subject?
In this article, you will see:
- What is an electric actuator and its function;
- Types of electric actuators;
- Advantages of an electric actuator;
- Main applications.
Enjoy this content. Happy reading!
What is an electric actuator? What is its function?
Accuracy for your industrial processes, efficiency in your automations, and versatility for your applications. Yes! We are talking about electric actuators, a device that converts electrical energy into mechanical energy.
This type of actuator usually works together with a control equipment and positioners. Its main function is to perform the mechanical movement of a control valve.
And how does this happen? Through transmission systems, the mechanical energy generated by electric actuators moves the valve plug to achieve the proper positioning.
In simpler terms, it can be understood as a motor that is operated remotely because it allows a wide range of movements (horizontal, vertical, or rotary) activated by a command.
Similarly, depending on the mechanical action exerted, the electric actuator can be classified as rotary or linear, and that's what we'll see next.
Before moving on to the next topic, it is important to note that electric actuators must operate within an explosion-proof and waterproof enclosure.
If you have any questions, rely on the Axpr team of specialists to help you better understand this subject. Just click here to chat with us!
Types of electric actuators: rotary and linear
As mentioned earlier, electric actuators can be divided into two categories according to the movement to be executed. Let's check each one out!
Linear:
Linear electric actuators convert the rotary motion of the built-in electric motor into linear or direct motion. That is, a pushing or pulling motion, ideal for performing simpler displacements.
In the market, we can see that most linear actuators use a combination of gears that allows various types of industrial applications, specifically in processes where tilting, retracting, extending, or lifting is required, such as gate and guillotine valves, for example..
Rotary:
On the other hand, rotary electric actuators have, as the name suggests, a rotary or turning motion necessary to operate rotary valves, such as ball or butterfly valves..
Depending on the application torque, the movement has either full or infinite rotation. Another important characteristic to note (for both types of actuators) is that in case of failure, the actuator maintains its last position after power loss.
Advantages of electric actuators
It is indisputable that the main advantage related to this type of actuator is related to the automation of valves, allowing communication between various components within the same network, as well as offering remote control without the direct/manual interference of an operator.
Additionally, another highlight of this solution compared to other types of actuators (hydraulic and pneumatic) is related to its opening or closing torque, especially compared to a pneumatic actuator.
And it doesn't stop there! There are other advantages we can mention, including:
- They are silent, non-toxic, and energy-efficient actuators;
- Integration with electric actuators is easier with programmable controls;
- Maintenance is minimized without the need for parts replacement;
- Great for remote applications;
- Dynamic stability.
Such a list of benefits makes various industrial sectors adopt this equipment in their operations. See what the most common applications are in the next topic.
Main applications of electric actuators
This solution, as seen throughout the article, is widely used in the industrial sector, mainly because there are several stages that require automation, from machinery to valves.
In the case of valves, electric actuators are always used when there is a need to intercept and regulate a certain fluid, be it liquid, suspension emulsion, gas, etc.
Thus, the main application sectors are:
- Oil and gas;
- Chemical/pharmaceutical;
- Food;
- Steel;
- Water treatment;
- Mining;
- Power plants;
- Pipelines;
- Among others.
Furthermore, this type of actuator is highly recommended for opening or closing valves in hard-to-reach or high-risk locations, allowing the operator to send commands to this device from a long distance.
It is also important to note that to determine which actuator is ideal for your operation, it is necessary to analyze the torque specification required for valve opening provided by the manufacturer, as this is the only way to ensure that you are acquiring one that meets your needs.
Do you have any doubts about the subject?
Know that here at AxprAxpr, we have specialists in the valve market, ready to answer any questions about actuators and other equipment. Click here and send us a message
