| 摘要 |
PURPOSE:To reduce the labor of an operator and to prevent the occurrence of malfunction by inputting a flow rate signal from a main pipe flow rate detector and a preliminarily determined flow rate set value to operate aperture degree of a main control valve and an auxiliary control valve by the direct control of a computer. CONSTITUTION:A main control valve 2 is inserted to a main pipe 1 of a flow rate controller, and this control valve 2 is by-passed by a by-pass pipe 4 to which an auxiliary control valve 3 is inserted. A main pipe flow rate detector 6 is arranged on the main pipe 1 below the pipe 4, and the flow rate detection signal form the detector 6 is inputted to a flow rate controller 9 consisting of a computer. The preliminarily determined flow rate set value is inputted to the controller 9 also. Aperture degree of the control valve 2 and the auxiliary control valve 3 are operated directly by the computer of the controller 9, and the labor of the operator is reduced to prevent the occurrence of malfunction and the reliability of the flow rate controller is improved. |
