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Valve positioners are used on controlling valves where accurate and rapid control is required without error or hysterises. Positioners are generally mounted on the side-yoke or top casing of the pneumatic actuator for linear sliding stem control valves, and at/near the end-of-shaft for rotary control vales.
How does a 4/20ma valve positioner work?
They're more versatile than their pneumatic-only counterparts and can handle more complex tasks. How They Work: These positioners take an electrical signal (typically 4-20 mA) from the control system, convert it into a pneumatic signal, and then use that to adjust the valve position.
What is the difference between a valve controller and a positioner?
A standard positioner is a simple tool that gets your valve to a set point. A digital valve controller is the smart upgrade, using a microprocessor to position the valve with extreme accuracy while also giving you diagnostic data to improve your whole process.
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