pneumatic actuators function and characteristics

The compact double-piston rack-and-pinion structure has precise meshing, high efficiency and constant output torque.

The aluminum cylinder, piston and end cover are the lightest in weight compared with the actuator of the same specification structure.

The cylinder body is made of extruded aluminum alloy and is treated with hard anodizing. The inner surface has a hard texture, high strength and high hardness. The sliding bearing made of low-friction materials avoids direct contact between metals, has low friction coefficient, flexible rotation and long service life.

Single-acting pneumatic actuators are reset by springs. They are generally used in dangerous working conditions, such as conveying combustible gas or flammable liquids. When the source of air is lost or an emergency occurs, the single-acting pneumatic actuator can automatically reset. The risk is reduced. The single-acting pneumatic actuator adopts a fork type transmission mechanism, and the output torque can be changed with the angle change. At the valve opening or closing position, the torque value is the largest, which is consistent with the law of the valve; secondly, the fork and the fork arm are highly coincident, It greatly saves space and meets the needs of various large-scale rotary valves. It has the advantages of safety and explosion-proof, and is widely used in the production process with high safety requirements such as power plants, chemical industries, and oil refining.

When compressed air enters the cavity between the two pistons of the cylinder from the air port, the two pistons are separated and moved toward the ends of the cylinder, forcing the springs at both ends to compress, and the air in the air chambers at both ends is discharged through the air ports, and the racks of the two pistons are simultaneously driven. The output shaft (gear) rotates 90 degrees counterclockwise. After the compressed air is reversed by the solenoid valve, the two pistons of the cylinder move in the middle direction under the elastic force of the spring, the air in the middle cavity is discharged from the air port, and the rack and pinion of the two pistons are synchronized to drive the output shaft (gear) clockwise. Rotate 90 degrees. You can adjust the micro angle from both ends, loosen the nut, use an Allen wrench to turn the adjusting bolt to adjust the required angle, and lock the nut.

Design features of single-acting pneumatic actuators

1. Extruded aluminum (ASTM6005) cylinder body, with fine grinding and finishing on the inner surface, advanced anti-corrosion technology both inside and outside, the cylinder has a small friction coefficient, long service life and strong corrosion resistance;

2. Double-piston rack and pinion design, compact structure, symmetrical installation position, easy to change the output shaft steering, long service life and rapid action;

3. The back of the piston rack is equipped with a composite bearing and guide ring, which has precise action, low friction coefficient and long service life;

4. Combined preload coated spring with long working life;

5. High-precision gears and racks, small meshing clearance, high precision, and large output power;

6. Stainless steel fasteners are safe and beautiful, with strong corrosion resistance.

QPC is a pneumatic actuator supplier, providing a variety of pneumatic actuator types, pneumatic actuators are reasonably priced and stable in quality, if you need them, you can contact us to buy~