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In the pneumatic automatic system, due to comparatively low cost, the pneumatic actuators are easily fixed and have many advantages such as simple construction, durability, various cylinder diameters and optional journey. As a result, pneumatic actuators are widely applied. In accordance with different service conditions, the construction, shapes and functions of pneumatic actuators are different.
According to compression of moving parts, the pneumatic actuators are divided into piston pneumatic actuator and piston-less pneumatic actuator. The sealed piston is installed in the piston pneumatic actuator. However, the piston-less pneumatic actuator applies diaphragm or diaphragm capsule, with several advantages such as no force of friction.
According to the number of piston, the pneumatic actuators can be divided into single pneumatic actuator and double pneumatic actuator. Single pneumatic actuator is the most widely applied in all the pneumatic actuators. Because there is piston rod in the one side of piston, the affected area of compressed air beside the piston is not equal. As a result, the shoot that piston stretches out is more than the pull when the piston returns. However, there are two piston rods beside the double pneumatic actuators. The shoot the piston stretches out is equal to the pull when the piston returns. And the affected area of compressed air beside the piston is the same. In addition, double pneumatic actuator can be separated from fixed cylinder body and fixed piston.
According to the way of drive, the pneumatic actuator can be divided into one-way working and both-way working. The one-way working pneumatic actuator supplies the compressed air from one side air to make piston drive and returns depending on spring force. However, the both-way working pneumatic actuator supplies the compressed air from air of both sides to make a return work for the piston.
According to the size, the electric actuators can be divided into mini-type, small-type, medium-type and big-type. The cylinder diameter of mini-type pneumatic actuator is 2.5~6mm; the cylinder diameter of small-type pneumatic actuator is 8~25mm; the cylinder diameter of medium-type pneumatic actuator is 32~330mm; the cylinder diameter of big-type pneumatic actuator is more than 320mm.
According to the way of lubrication, the pneumatic actuator can be divided into with-lubrication, without-lubrication and no lubrication.
After the detailed introduction of the classification of pneumatic actuators, we have faith in believing that you will have a further understanding on the theory of pneumatic actuators. We will introduce the best limit switch brands in China in the next time. We hope that this article will help you a lot not only in your daily life but also in the working time. And we hope that you can share this article with your families and friends. Thank you for your reading.