6010 locator issue
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There is a FISHER control valve (air-operated shut-off valve) on site; its positioner is of type 6010. Under normal operating conditions, the valve’s opening remains almost constant. Recently, it has been observed that whenever a change in the valve’s setting is required, the air supply to the valve’s positioner drops to zero. After that, the valve could no longer be controlled; recalibrating the positioner resolved the issue, and it then operated normally. The process then resumed normal operation (with the valve position remaining essentially unchanged). The next day, when I tried to check it, I found that once it started operating again, the output became 0. I was wondering if any experts have any good suggestions.
This post was last edited by tiger2010 on 2019-1-31 08:39. Regarding the 6200 series you mentioned, is your 6010 a potentiometer or a magnetic feedback device?
It has a feedback arm connected; it’s not magnetic feedback
That shouldn’t be the case; it seems this model has been discontinued for a long time. How long have you been using your 6010?
It’s been a long time... The valve has been in use for quite some time.
Are spare parts available for the same model of locator? It would be best to try replacing the entire locator. I’m not sure what the overall circuit of your locator is like; it’s hard to say whether the problem lies with the locator itself or with the signal circuit
It is very important to determine whether the valve should be open or closed when a change is needed. If the opening degree is currently 30%, it needs to be adjusted to 60%. During this process, the air output from the actuator’s positioner is zero, as it is a pneumatic valve that closes when activated; the positioner’s output is then vented, with the spring playing a role in this process. If no action occurs at this time, it may indicate that there is something stuck in the actuator or that the spring might be broken. When the valve value changed from 80 to 30, the locator did not produce any output; therefore, the locator should be checked carefully.