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400X flow control valve overview: 400X flow control valve, is a multi-function valve with high-precision pilot-mode flow control. Suitable for distribution pipe to control the flow and pressure of the pipeline, to maintain a predetermined flow rate will be too large flow limited to a predetermined straight, and appropriate to reduce the upstream high pressure, even if the main valve upstream pressure changes, it will not affect the main Flow downstream of the valve. The valve changed the conventional throttle orifice plate or purely mechanical principle to reduce the basin area, the use of related pilot valve to minimize the ability of the loss in the throttling process. In case of emergency 400X flow control valve can be completely cut off the flow, to avoid losses. Control the spirit of high degree of freedom, safe, reliable, easy commissioning, long service life. 400X flow control valve structure features and uses: 400X flow control valve consists of the main valve, flow control valve, needle valve, pilot valve, ball valve, microfilter and pressure gauge composed of hydraulic control system. Utilize hydraulic automation to control and adjust the main valve opening to maintain constant flow through the main valve. 400X flow control valve using hydraulic self-control, no other devices and energy, easy maintenance, flow control and stability. 400X flow control valve valve products are widely used in high-rise buildings, living areas and other water supply pipe network systems and urban water supply projects. 400X flow control valve works: When the valve from the inlet side of the water, the water flow through the needle valve into the main valve control room, and after the pilot valve, the ball valve out of the main valve control room to the export, then the main valve is fully open or floating state . Set the flow control valve in the upper part of the main valve to set a certain degree of opening for the main valve. Adjust the needle valve opening and adjust the pilot valve spring pressure, you can maintain the main valve opening at the set opening, and when the pressure changes pilot valve automatically adjusts to maintain the same flow.