Utmost Flow Control Technology Co., Ltd.
Utmost Flow Control Technology Co., Ltd.

Function and Design of Pneumatic Actuators

The pneumatic actuator series uses a versatile, modular, forked design that can be configured as double-acting or spring-return. Its compact and efficient design allows the actuator to achieve high torque even at low pressure.

Pneumatic actuator design

  • The pneumatic actuator has a modern and compact design with a range of series products available for more economical selection.

  • The high-strength aluminum cylinder body is extruded, with a finely ground and hard anodized inner surface for long service life, low friction, and rapid movement.

  • All moving surfaces use high-quality bearings for low friction, long life, and noise-free operation.

  • Two independent travel adjustment mechanisms are installed externally, which facilitates adjustment of the ±5° fully open or fully closed position.

  • Actuators with the same external structure are available in double-acting and single-acting (spring-return) types for easy installation of all output accessories.

  • Preloaded load springs ensure easy and safe installation and disassembly.

  • The piston and end cap are made of die-cast aluminum alloy for high strength and light weight.

  • Changing the sealing material makes it applicable to high-temperature or low-temperature environments.

  • A connection plate is provided for direct installation of solenoid valves.

  • The standard multi-functional position indicator provides visual indication.

Pneumatic actuator function

The pneumatic actuator has both positive and negative effects, with the valve stem moving downward when the signal is amplified, and vice versa for reverse action. The pneumatic actuator has a high movement speed, but the speed decreases under increased load, making it highly adjustable. Compared with similar actuators, it has many performance characteristics that surpass its peers from Utmost pneumatic actuator manufacturer, which is a reason why many buyers will purchase the pneumatic actuator when purchasing a pneumatic ball valve. The output force of the pneumatic actuator is related to the operating pressure, which guarantees high reliability and stability. However, the valve cannot be maintained after the gas source is interrupted. To achieve maintenance, it is necessary to add a holding valve. Currently, the maintenance of pneumatic actuators is very simple, with daily maintenance easily conducted and a strong adaptability to the environment.

  • Compact structure and small size make installation easier than pneumatic actuators. A basic electronic system includes an actuator, three-position switches, fuses, and some wires.

  • The driving source of the pneumatic actuator is flexible, and a general vehicle power supply can meet its needs, whereas the pneumatic actuator requires gas source and compression drive.

  • The pneumatic actuator has no risk of "air leakage" and high stability, but the compressibility of air makes its stability slightly inferior.

  • No need to install and maintain various pneumatic pipelines.

  • The load can be maintained without power supply, while the pneumatic actuator requires continuous pressure supply.

  • The pneumatic actuator is quieter because it does not require an additional pressure device. In the case of high loads, a silencer must be added.

  • In pneumatic equipment, it is usually necessary to convert an electrical signal into an air signal, and then into an electrical signal again, which results in a slower transmission speed and makes it unsuitable for complex circuits with too many elements.

  • The pneumatic actuator has better control accuracy.

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