Product Introduction

This product, developed by our engineering and technical personnel through the introduction of new technologies as well as improvements in manufacturing processes and structures, has reached the advanced level of international similar products. The valve body adopts a full-channel streamlined design, featuring low fluid resistance and large flow rate. It uses hydraulic operation in terms of transmission mode, that is, the water pressure in the pipeline is utilized to automatically control the vertical movement of the main valve disc and adjust the opening of the main valve port. The main valve is installed in the pipeline for controlling flow in water supply and distribution pipelines. By presetting and adjusting the pilot regulating valve and a fixed flow rate of the pilot valve on the upper part of the valve, the flow rate through the main valve can be kept constant without being affected even if the pressure upstream of the main valve changes. In a word, this product is an ideal choice for domestic water supply, fire protection systems and industrial water supply systems.

Product diagram of 400X piston flow control valve

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.

Working Principle

When the water pressure at the inlet of the main valve enters the valve body and the control chamber (see the structure diagram) respectively, 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, all the water pressure in the control chamber is discharged to the low-pressure area downstream, and the main valve is in a fully open state. Adjust the opening degree of the ball valve 6 outside the main valve to balance the water flow through the needle valve 17 and the ball valve 6, and the main valve is in a floating state.The flow control valve uses the pressure difference of water flow entering the main valve control chamber through the conduit and the needle valve 17, leads the pipe to and controls the valve opening degree by means of the spring of the adjusting conduit 9, and adjusts the pilot regulating valve 15 on the upper part of the main valve to ensure the set opening degree 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 the diaphragm type, and the same applies to the piston type.)

Structural diagram of 400X piston flow control valve

The valve consists of a main valve, pilot valve, pilot regulating valve, needle valve, ball valve, micro-filter, pressure gauge, etc. Since the pilot valve, needle valve, pressure gauge and other components are connected to the main valve via conduits, they are collectively referred to as the conduit control system. It can be divided into diaphragm type and piston type according to the requirements of different pipe diameters.

Main Parts and Materials

Main Technical Performance

Outline Dimension Drawing of 400X Piston Type Flow Control Valve

Outline Dimension Table of 400X Piston Type Flow Control Valve