(364aj) Stiction Detection in Valve Using He’s Model By Simulation of Equal Percentage Valve Characteristic Transfer Function

Valve stiction is one of the most prominent issues in the inspection of chemical processes. Each chemical plant has 500 - 5,000 process control loops with liquids as the main component and valves as the primary control equipment. Valves not maintained regularly often lead to stiction even though the problems may not be significant when combined with the general workings of industrial controllers this results in limited fluctuations in the flow rate of fluids and all related process state variables. Valve stiction is responsible for about 20-30% of oscillation problems and is a major concern in process monitoring. Many automatic valve stiction detection models have been developed, such as Choudhury’s model, Kano’s model, and He’s model. This research will present a study on valve stiction using He's model to predict by simulated valve characteristic transfer function that influences the control process for measurement level and temperature in water storage tanks.