MKSVC
High‑pressure pneumatic actuator
Keywords: Michaelson, Implementing Agency
A pneumatic actuator is a device that uses air pressure to drive the opening, closing, or regulating of valves; it is also referred to as a pneumatic actuator or pneumatic device, though it is commonly and colloquially called a pneumatic head.
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Detailed Introduction
A pneumatic actuator is an actuating device that uses air pressure to open, close, or regulate valves; it is also referred to as a pneumatic actuator or pneumatic device, though it is more commonly and colloquially called a “pneumatic head.” Pneumatic actuators are sometimes equipped with certain auxiliary devices, the most common of which are valve positioners and handwheel mechanisms. The function of a valve positioner is to leverage the feedback principle to enhance the performance of the actuator, enabling it to achieve precise positioning in accordance with the control signals from the controller. The purpose of the handwheel mechanism is to allow direct manual operation of the control valve—when the control system experiences power outages, air supply interruptions, no output from the controller, or actuator failure—thereby ensuring the continued normal operation of production.
The types and structures of the regulating mechanisms in pneumatic actuators are broadly similar; the primary difference lies in the actuator itself. Therefore, when introducing pneumatic actuators, we divide the discussion into two parts: the actuator and the control valve (regulating mechanism). A pneumatic actuator consists of two main components: the actuator and the control valve (regulating mechanism). Depending on the magnitude of the control signal, the actuator generates corresponding thrust to drive the control valve into action. The control valve is the regulating component of the pneumatic actuator; under the action of the actuator’s thrust, it produces a specific displacement or angular rotation, directly adjusting the flow rate of the fluid.
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