Even though control valves and the associated tuning problems are the largest or most frequent source of variability in loops, the full capabilities of advances in actuator, positioner and valve technology have not been effectively used due to the lack of understanding and recognition of the problem. The fact is, valve positioners may be lying to us, and valve specifications may be misleading.
But what if we are fully conscious of all possible problems associated with poor valve response and understand the specific solutions?
In the white paper, "Valve response: truth or consequences," Gregory McMillan and Pierce Wu aim to do just that.
Control Hall of Fame member and columnist Greg McMillan, consultant at Mynah Technologies, and Pierce Wu, lead project engineer at Mynah Technologies, combined their brain power in an effort to provide an extensive tour of valve response dilemmas and resolutions.
In "Valve response: truth or consequences," readers will discover the sources of poor valve response and the fundamental solutions needed to address the root causes. Temporary fixes are also described to mitigate the consequences until true solutions can be implemented. These fixes are a way of buying some time until a better control valve can be installed.