| 摘要 |
The present invention relates to a flow rate adjustment check valve control device using pipeline pressure and comprises: a first branch pipe branched out from a pipeline at the entrance side of a check valve; a second branch pipe branched out from the pipeline at the exit side of the check valve; a differential pressure generator for comparing a first pressure permitted from the first branch pipe and a second pressure permitted from the second branch pipe, and outputting a differential pressure between the first pressure and the second pressure; a check valve actuator which is operated by the differential pressure, and controls the degree of opening/closing of the check valve and the operation speed of the check valve by corresponding to the differential pressure; and a control portion for selectively controlling the pressure inputted into the differential pressure generator. The present invention significantly reduces the electricity used in operating the flow rate control check valve by enabling the opening/closing operation of the check valve using the small amount of electricity used for operating an electronic opening/closing valve, and also by controlling the flow rate. |
