How Gate Valve Works?

2022-07-14

The gate valve can only be fully opened or fully closed, and cannot be used as a valve for regulating flow. Its working principle is that the gate plate moves up and down together with the valve stem, and there are trapezoidal threads on the valve stem. The up and down movement of the valve stem is realized through the nut at the top of the valve and the guide groove on the valve body. Gate movement. The movement direction of the gate is perpendicular to the direction of the fluid medium in the pipeline.

A gate valve refers to a valve in which the closure (gate) moves in the vertical direction of the central line of the passage. The gate valve can only be used for full opening and full closing in the pipeline, and cannot be used for adjustment and throttling.
Gate Valve
Gate valve is a kind of valve with a wide range of use. Generally, it is used for blocking devices with a diameter of DN ≥ 50mm. Sometimes a gate valve is also used for blocking devices with small diameters. The gate valve is used as a cut-off medium. , the pressure loss of medium operation is the smallest at this time. Gate valves are usually used in conditions that do not need to be opened and closed frequently, and keep the gate fully open or fully closed. Not suitable for regulation or throttling use. For high-speed moving media, the gate can cause vibration of the gate when it is partially opened, and the vibration may damage the sealing surface of the gate and the valve seat, and the throttling will cause the gate to be eroded by the medium.

From the structural form, the main difference is the form of the sealing element used. According to the form of the sealing element, the gate valve is often divided into several different types, such as: wedge gate valve, parallel gate valve, parallel double gate gate valve, wedge double gate gate valve, etc.