Flow regulation of gases, liquids and steam - has flow measurement to provide closed loop control of regulating valve with adjustment by generated error signal

摘要

The flow regulator for liquids, gases or steam is controlled by a feedback loop from a flow transducer. The input unit (8) which may be programmed issues a command to a measuring unit (40) and the measured parameter is compared with the command in a control unit (6). The actuating error signal generated is then used to adjust the position of a valve to regulate the flow passed between input and output (2, 3).