How to achieve valve feedback
Thread Content
How can valve feedback display be achieved through FDM? Is this display accurate? If not, how can it be adjusted to be more accurate?
What is FDM? I’ve never seen it. The principle behind valve feedback is the transmission of on/off signals; proximity switches or feedback devices can be used for this purpose. Accuracy of the display isn’t important; what matters are the signal transmission distance and the quality of the receiving module
The feedback on the valve’s on/off status can be provided using a feedback switch, with types including mechanical, contact-type, and sensor-type. If valve opening feedback is required, then add a positioner with valve opening feedback
What you’re referring to is just the signal for switching the response, while I’m talking about the signal from the control valve – a feedback indicating the actual degree of opening achieved at the site, based on the setting given by the control system.
The locator with valve opening feedback is quite expensive; is it possible to achieve valve opening feedback through other programs?
It’s fairly accurate; some factories have conducted parameter comparisons, and the valve feedback read via HART shows little deviation from the set opening value.