Product Introduction

This product has reached the advanced level of international similar products through the introduction of new technologies, manufacturing processes, and structural improvements by our engineering and technical personnel. The valve body adopts a full channel streamline design, with low fluid resistance and high flow rate. Hydraulic operation is adopted in the transmission mode, which uses the water pressure in the pipeline to automatically operate the up and down movement of the main valve disc and control the opening of the main valve port. The main valve is installed in the pipeline of the water supply and distribution pipeline to control the flow rate. You can first set a fixed flow rate for the upper guide regulating valve and the guide valve to keep the flow through the main valve constant, even if the pressure upstream of the main valve changes, it will not affect it. In short, this product is an ideal choice for domestic water supply, fire protection systems, and industrial water supply systems.

400X Diaphragm Type Flow Control Valve product image

working principle

When the water pressure at the inlet end of the main valve enters the valve body and control chamber respectively (see structural diagram), and the ball valve 6 outside the main valve is closed at the same time, the main valve is in a fully closed state. When the ball valve 6 outside the main valve is fully opened, and the water pressure in the control room is fully arranged in the downstream low-pressure area, the main valve is in a fully open state. Adjust the opening of ball valve 6 outside the main valve to achieve balance between the water flow passing through needle valve 17 and ball valve 6. At this point, the main valve is in a floating state.

The flow control valve utilizes the pressure difference between the water flow entering the main valve control chamber through the conduit and needle valve 17, and is led to and controlled by the spring of the regulating conduit 9 to adjust the valve opening. The upper part of the main valve is adjusted to guide the regulating valve 15 to ensure the set opening of the main valve port, so that the flow in the pipeline does not exceed a certain set value. Even if the upstream pressure changes, it will not affect the downstream pressure. (This is the working principle of diaphragm type, and the same applies to piston type.)