Knowledge based valve control method
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United States of America Patent
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-
Sep 11, 2012
Grant Date -
Apr 2, 2009
app pub date -
Sep 24, 2008
filing date -
Oct 1, 2007
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A method associated with a valve controller configured to capture dynamic process conditions for monitoring, diagnosing and maintaining a valve assembly through knowledge-based valve performance criteria. The method includes determining the open and closed positions of a process valve. Measuring the peak torque value required by an actuator to open and close the process valve. Measuring the supply and exhaust pressure required by an actuator to open and close the valve. Determining a deviation zone associated with the peak torque value to open the valve where an alarm is triggered when the torque value falls outside the deviation zone. Creating the dynamic baseline over Nth process cycles when the valve is installed in-line.
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