Abstract
The market demands for higher quality products have increased the need for reduced process variation. One factor in the quality of the final end product is the improvement of the control loop performance. A critical component in the loop is the final control element, the control valve package. Optimized actuator parameters play a vital role in the dynamic performance of the control valve. This paper reviews the pneumatic actuator and positioner parameters that effect the control package performance. This is done through the use of a control valve package computer model to assess the dynamic performance. The attributes of spring return versus double acting actuators are illustrated. The effects of supply pressure, step size, load margin, and flow, actuator volume and design style are investigated through the use of mathematical simulations of control valve dynamic performance.
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