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What is a pneumatic actuator valve?

A piston that is enclosed inside a cylinder that is hermetically sealed may be moved with the help of a pneumatic actuator. The pressure, which originates from an external supply of air or gas, is what drives the actuator’s movement. Because of this pressure, the cylinder moves, which either fully open or completely shuts the valve, or partially modulates its open-and-close motion. Depending on the kind of valve to which it is linked, the pneumatic actuator valve may operate in either a linear up-and-down motion or in a horizontal direction at an angle of ninety degrees. Both of these motions are possible. In this particular instance, we are speaking about rotary 90-degree turn Pneumatic Actuators, although you can also buy linear ones. These actuators are intended to rotate a valve (often a ball, butterfly, or plug) across an angle of 90 degrees (open and close). The actuator is controlled by the application of pneumatic air pressure.

Design of Pneumatic Actuator:

The bottom of the actuator pinion is fastened to the valve stem, which rotates the valve through a complete turn of ninety degrees. Actuators like this are available in a few different configurations, including rack and pinion, scotch yoke, and vane. Because of their more compact construction, rack and pinion are often utilized for applications involving smaller valves, while scotch yokes are more frequently employed for situations involving considerably bigger valves. The vane style is used quite a little these days. Compressed air serves as the medium for pneumatic actuators, which may be configured as either Double Acting or Spring Return (also commonly referred to as single-acting). In addition to the actuator itself, a number of other accessories, such as Namur direct mount solenoid valves, speed controllers, load control, and feedback limit switches, may be used in combination with it. Pneumatic actuators are available in a wide variety of diameters, each of which corresponds to a certain range of torque; the torque rises in proportion to the bore size (larger surface area of the piston).

Why we should buy a pneumatic actuator?

There are many various designs and power sources available for valve actuators, which are devices that are used to operate valves. Pneumatic and hydraulic systems stand out as two of the categories that may be classified with the greatest degree of ease when considering these criteria. Each one has perks and drawbacks, the proportion of which depends in part on the nature of the specific application, the quantity of space that is accessible, the working pressures, and the speeds that are necessary for the safe functioning of the valve. In a single application, it is doable to use a combination of pneumatic and hydraulic valve actuators to control the valves. This kind of actuator is known as a hybrid actuator. In locations that are geographically remote and do not have access to compressed air or electricity, hydraulics is often used as an alternative power source. When compressed air sources are available, such as in refineries, chemical plants, and pipeline compressor stations, the characteristics and capabilities of a pneumatic actuator often perform better than those of an electric actuator. This is because pneumatic actuators use pressurized air to power their mechanisms.

Advantages of pneumatic Actuator:

If you have access to all of the available sources, it is in your best interest to go with pneumatic actuators rather than hydraulic or electric ones for a variety of reasons, including the following:

  • The probability of contamination as a consequence of their source of power is quite low. As a result of this, its design may be simpler, and it may be used in applications that demand the greatest degree of cleanliness, such as the manufacture of pharmaceuticals as well as food and beverage products. Moreover, it meets the requirements of these applications.
  • In most cases, pneumatic valve actuators need just a little amount of maintenance.
  • Pneumatic actuators have the potential to be developed to be more compact, lighter, and more responsive than their mechanical equivalents. This is made possible by the air’s compressibility, which has very little or no resistance at all. When there is a need for higher stroking power, the diameters of the cylinders may be enlarged to accommodate the demand.
  • They are often chosen in preference to other possibilities where there is a need for a rapid opening or closing of the door.
  • Both in terms of the applications they’re employed for and the contexts in which they’re deployed, pneumatic actuators are very flexible devices. They are often able to perform admirably throughout a wide temperature range, which may extend from -40 degrees Fahrenheit to +250 degrees Fahrenheit.

Applications of Pneumatic Actuator:

  • Utilizing air-powered actuators is a tried and tested approach to achieving both rotational and linear motion. Air offers a mechanism that is dependable, safe, and cost-effective for the actuation of valves, including both on/off and control.
  • Air actuators are often more cost-effective than electric actuators up to a particular diameter valve, even when one takes into account the expense of providing the compressed air itself. The economics begin to shift more in favor of electric actuators as the size of the valves increases. More and more often, electrical valve actuators are being used. [Citation needed] [Citation needed] Despite this, pneumatic actuators have their advocates thanks to the ease with which they can be made fail-safe, the robustness of their construction, and their simple but effective design. They are capable of moving at a quicker rate than electric actuators and are not bound by duty cycles.
  • Ongoing efforts are being made with the goal of increasing the compatibility of classic pneumatic and hydraulic actuators with distributed control systems.
  • In many different types of motion-control systems, rotary actuators are employed to operate things like pick-and-place handlers or clamps, for example. Even with the introduction of more powerful stepper- and servo-motor-powered electrical actuators, linear air cylinders continue to play an important role in automation.
  • This has been the case for a long time. Cylinders that have feedback enable servo-pneumatic actuators to handle positioning applications that are too fine for regular cylinders but too coarse for electrical actuators. While their primary application is in point-to-point moves, this capability allows servo-pneumatic actuators to handle a wider range of applications.
  • These kinds of devices are able to produce significant forces despite their compact size and may function continuously without producing excessive heat. Because air is compressible, air cylinders have traditionally been superior for point-to-point movements. As part of their development, however, engineers have been working to devise control algorithms that can take this property into account.

From where to buy the best pneumatic Actuator valve?

If you are here for buying Pneumatic Actuator Valves, then you are in the perfect place, as GMK valves are considered to be one of the most reliable and durable valves in the world.

Why GMK?

GMK has successfully created the technological research and development center, as well as the quality inspection center, together with a management structure that is quite good. In addition to this, it has brought in cutting-edge manufacturing technology from abroad and is equipped with cutting-edge machining centers, CNC machine tools, metal cutting and processing equipment, physical and chemical testing equipment, nondestructive testers, spectrum analyzers, valve comprehensive performance testers, and other apparatus in order to guarantee that its products achieve their goal of having zero leaks. We adhere to the principle of “Quality first, Prestige important,” and we have a team that is both well-trained and dedicated, which includes engineers, technicians, and other employees. This enables us to provide our customers with a product that is of high quality, at a price that is affordable, and in a timely manner. We are always exploring new ideas and methods to keep one step ahead of the ever-evolving industry by working hard to enhance our already existing goods. We believe that with our expertise and years of experience, we can help you expand your market and achieve new levels of brilliance in the future.

What pneumatic Actuator valve GMK offers:

GMK offers a variety of Pneumatic Actuator valves. Their famous ones include Cage-type control ValvesGlobe Valve with pneumatic actuatorsGMK High-Performance Butterfly Valve with Pneumatic ActuatorPTFE PFA lined butterfly valves with pneumatic actuators, and many more.


GMK has maintained a singular focus on the automation of valves and flow control throughout its more than quarter-century-long history. We are able to tailor industrial valve actuators to your precise requirements and supply these products to you. Our staff will make it a priority to discover precisely what it is that you need as part of the process that we follow, and we will collaborate closely with you to provide the optimal answer.