Motor-driven actuators use an AC- or DC-powered servo motor to move the valve to the desired position. In solenoid driven actuators, an electrical current is passed through a coil to generate a magnetic field that moves the metal stem to adjust the position of the electrical valve disc. Electric actuators are further subdivided into two classifications: solenoid or motor-driven actuators. What Are Electric Actuators?Įlectric actuators, on the other hand, use electricity as the main power source to drive the actuator motion. Pneumatic actuators typically produce linear motion but can also be used to generate rotary movement. The diaphragm, which is connected to a valve stem, moves up or down to adjust the pneumatic electric valve disc and control fluid flow. In the most common type of pneumatic actuator, the diaphragm actuator, air is pumped into a hollow casing where the resulting pressure acts on a flexible rubber diaphragm to deflect it from its original position.
Pneumatic actuators use air (or another gas) pressure as the primary power source to produce motion, which, in turn, controls the valve. The main difference between these two types of actuators is the primary driving force used in their operation. However, most actuators fall under two classifications: electric actuators or pneumatic actuators. There are several different types of valve actuators available. The motion generated by the actuator can be either linear (straight horizontal or vertical motion) or rotary (revolving around a fixed axis). The actuator itself is a mechanism driven by an external power source to produce a particular motion, which controls the valve position. Valve actuators are automated mechanical devices capable of adjusting the position of various types of valves. Sign up here to get the day’s top stories delivered straight to your inbox. Welcome to Thomas Insights - every day, we publish the latest news and analysis to keep our readers up to date on what’s happening in industry.
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