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The Function of Valve Positioner
Adapted varieties
Commonly used actuators are divided into pneumatic actuators and electric actuators, which can be divided into straight travel and angular travel. It is used to open and close all kinds of valves, wind panels, etc. automatically or manually.
The main function
Pneumatic valve positioner and pneumatic actuator together constitute an automatic control unit and various regulating valve connections, after debugging and installation, are combined into a pneumatic regulating valve.
Used in various industrial automation process control fields.
Structure principle
The pneumatic valve positioner receives 4-20mA weak current signals from the controller or control system, and sends air signals to the pneumatic actuator for control
Valve position device.
It is used in conjunction with a pneumatic control valve to form a closed loop control loop. The direct current signal given by the control system is converted into a gas signal for driving the regulating valve to control the action of the regulating valve. At the same time, feedback is performed according to the opening of the regulating valve, so that the valve position can be correctly positioned according to the control signal output by the system.
Supporting the use of
It can be used for single-acting (spring return type) and double-acting pneumatic actuators.
