Type 8718 is an instrument for liquid flow control in process technology. The
measured value provided by the sensor will be compared in the digital control
electronics with the predefined set point according to the signal; if a control
difference is present, the control value output to the proportional valve will be
modified using a PI-control algorithm. In this way, the flow can be maintained
at a fixed value or a predefined profile can be followed, regardless of pressure
variations or other changes in the system. As a control element, a proportional
valve working at low friction guarantees ahigh sensitivity and the good
control characteristics of the unit.
Type description