What is the magnet strip on the valve positioner used for?
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Everyone, may I ask what the principle behind a valve positioner is? What is the magnetic strip at the top used for? Are there any more vivid pictures or videos to help explain this...
The function of a valve positioner is to convert the control signal output by the regulator (usually an electrical signal) into a pneumatic signal that controls the valve, thereby enabling it to move. The displacement of the valve is fed back to the positioner via a feedback rod, which helps to achieve precise positioning. Magnetic strip? ? ? There are many images and such available to search for online.
The magnetic strip on the Yamaki intelligent locator is used for setting parameters; there is no need to open the cover for magnetic induction
Is the regulator you mentioned the actuator on the control valve? ? Is the output control signal an electrical signal? ? ? Please explain... Sauri, I don’t quite understand.
I’m not very familiar with it. Are there any relevant materials available to help me learn about positioners?
The regulator is not the same as the actuator on control valves; the regulator functions like the brain of a system, serving as the control unit. Regulators come in pneumatic and electric types, with electric regulators being the most commonly used. The signal output by them is usually in the range of 4–20 mA. The actuator on the control valve carries out its function after receiving signals from the regulator.