A few questions about control valves?
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What are the functions of the valve positioner and the feedback device in a pneumatic control valve?
The function of the positioner is to determine the valve position of the control valve. The responder’s function is to provide feedback on the valve’s position to the monitor.
:) Reply to 4# zyzs
The locator is used to accurately and quickly determine the valve position set by the control room, while the feedback function sends the current valve position at the site back to the operators in the control room
A valve positioner (also known as a pneumatic valve positioner) is a key accessory for control valves, typically used in conjunction with pneumatic control valves. It receives the output signal from the controller and uses this signal to control the opening degree of the pneumatic control valve. A valve indicator is a type of field instrument used in automated control systems for displaying the valve’s position and providing signal feedback; it outputs signals indicating whether the valve is open or closed in the form of switch signals (contacts), which are then received by a programmable controller or a computer. Once confirmed, these signals trigger the next sequence of actions.