Linear actuators perform important functions in any system. For industrial processes, an actuator is a device that operates valves, dampers, fluid couplings, and other mechanical equipment. They exist to make sure the system works as designed and their performance, or lack of it, can impact many aspects of an industrial plant’s operations.
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All actuators, regardless of design, should be able to:
Provide precise, repeatable positioning
Start and stop instantaneously without delay
Operate without limitations on the number of starts per minute
Perform reliably unaffected by load
Operate in different environments with minimal periodic maintenance
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Industrial actuators can use air, hydraulic fluid, or electricity to operate. This blog will compare common linear actuator types, what they are used for, and their common advantages and disadvantages.
Electric valve actuators are devices that use electric signals to control the opening and closing of valves. They are used in a variety of industries, including oil and gas, water treatment, and HVAC. Electric valve actuators offer several advantages over manual or pneumatic actuators, including more precise control, higher reliability, and lower maintenance costs.
When selecting an electric valve actuator, it is important to consider the application and required torque. Other factors such as voltage, power consumption, enclosure type, and certifications may also be important.
Types of Electric Valve Actuators
There are two main types of electric valve actuators: direct-acting and reverse-acting. Direct-acting actuators open the valve when energized and close it when de-energized. Reverse-acting actuators do the opposite: they close the valve when energized and open it when de-energized.
The most common type of direct-acting actuator is the solenoid actuated ball valve. This type of actuator uses a magnetic field to move a plunger that opens or closes the valve. Solenoid actuated ball valves are often used in applications where fast response times are required, such as in irrigation systems.
Reverse-acting actuators are more commonly used than direct-acting ones because they have certain advantages, such as being fail-safe (i.e., the valve will close if there is a
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