What is an Actuator and What Types of Actuators are Available [Buying Tips Inside]

An actuator is a fully-mechanical or electro-mechanical device that provides movement to the attached devices, which are operated electrically, manually, or through fluids. This device provides you either liner or rotary motions. Different types of actuators are available in the market, based on your personal needs. Where some linear actuators work through push and pull function, some are operated manually via rotating knob or handwheel. The actuators do come in different sizes and styles that you can choose according to the application. Moving ahead, these pneumatic actuators are used for linear movement. However, single-acting actuators and a double acting actuator differ based on how air operates on the actuator and provide the respective movement. In a single-acting actuator, the compressed air is used to move the piston in a single direction. Hence separate energy is required for retracting it back to its initial position. On the contrary to this, a double-acting actuator is effective to provide two-way movement through air compression. This primary difference distinguishes these two pneumatic actuators and makes their uses in different applications. Now, let's take a look at the different types of pneumatic actuators in detail. Double Acting Actuator: As mentioned earlier, the double acting actuator is built with a port that enables the piston's dual movement (forward & backward) through compressed air. Single Acting Actuator: In a single acting actuator, the piston only moves in a single direction. It is made with a single port that utilizes compressed air for unidirectional movement. Further, additional compressed air is required to bring it to the required position. Note: In some single-acting actuators, the external forces (spring or gravity) are used to retract the piston and bring it back to the initial position. As a single-acting actuator has one port, it is compact and has low air consumption. Spring Return Actuator: As the name suggests, the sprint return actuator uses a spring to retract the piston to its initial position. In short, a spring return actuator is a single-acting actuator that includes a spring to retract the piston. Further, its simplicity, affordability, and low pricing make it the best alternative to available options. Selecting a reliable actuator is an unlikely scenario if you don't have adequate knowledge. Hence below listed are some pointers that will help you choose the right actuator for your purpose. Check the Required Movement: Check whether you need a liner or rotary movement. Linear actuators are beneficial in unidirectional motions. Check the Required Energy Input: With time, different types of actuators are introduced in the market. Among all, electrical actuators are in huge demand. However, this doesn't mean it works well for all purposes. Check much electric voltage input is required for your needs. Check the Precision Level: Based on your working environment, you should consider the actuator's precision level. How Fast Movement Do You Require: Actuator speed is another factor you must consider for your needs. Check Actuator Operating Environment: Some actuators are made to work in rough, humid, and rugged environments. You must choose the one that can work efficiently in your environment. These tips will help you find the best-suited actuator for your purposes.