| 摘要 |
<p>A system for controlling the actuator of a flow control valve in which the measured pressure drop Wp across the valve and the set flow rate Qs are fed to a functional block which executes the relationship !Wpo.Qs/!Wp = Cvs, where Wpo is the constant pressure drop across the valve used to determine its characteristic curve of Cv as a function of the different valve plug positions, said value Cvs being fed to another functional block which transduces it into a positioning value for said valve plug in accordance with said characteristic curve, and with which said valve actuator is controlled. <IMAGE></p> |
