TWO STAGE FLOW CONTROL VALVE

摘要

The present invention relates to a two-stage flow control valve having two big and small disks, which precisely controls a flow rate by using the big disk in the case that the flow of a large amount of fluid is controlled and the small disk in the case that the flow of a small amount of fluid is controlled. The two-stage flow control valve comprises: a valve body which is connected to a conduit; a first disk which is installed inside the valve body to be rotated in order to open and close a flow path and has a through hole in the center; and a second disk which is installed in the through hole formed in the center of the first disk to be rotated in order to open and close the through hole and controls a flow rate less than the first disk.