Flow control valve by the main valve, flow control valve, needle valve, pilot valve, ball valve, micro-filter and pressure meter composed of hydraulic control receiver system, the use of hydraulic automatic operation, control and adjust the main valve opening, so that the flow through the main valve to maintain a constant. Flow control valve using hydraulic self-control, without other devices and energy, easy maintenance, stable flow control. Flow control valves are widely used in high-rise buildings, living quarters and other water supply network systems and urban water supply projects.

Flow control valve adopts the pilot type way to control the flow of multi-functional valves, suitable for installation in the distribution regardless of the road need to control the flow of the pipeline, keep the scheduled flow unchanged, will be too large to limit the flow of a pre-indeterminate period of time value, will be upstream of the high pressure downstream of the low pressure, even if the flow control valve upstream of the main valve of the pressure changes, but also will not affect the flow control valve downstream of the flow of the main valve.

Flow control valve working principle, when the valve from the inlet side of the water supply, the water flow through the needle valve into the main valve control chamber, and through the pilot valve, ball valve out of the main valve control chamber to the outlet, at this time, the main valve is in the full open or floating state. Adjust the flow control valve on the upper part of the main valve, you can set a certain degree of opening for the main valve. Adjust the needle valve opening and adjust the pilot valve spring pressure, you can make the main valve opening in the set degree of opening, and in the pressure changes in the pilot valve for automatic adjustment, to maintain the flow rate is unchanged.