You will understand after reading it!

 A gate valve is a valve that can only be fully opened or fully closed. The opening and closing part of the gate valve is the valve disc. When the handwheel is turned, the valve disc will move up or down in a straight line to open or close, and to circulate or cut off the medium. It is generally composed of valve body, valve seat, valve stem, valve disc, valve bonnet, and sealing ring. The valves can be driven by handwheel or with actuators, like electrical actuator, pneumatic actuator.

The gate valve is not easy to block, so the gate valve is very suitable for the circulation of viscous materials such as mud, syrup, cement, garbage disposal, grease, etc.

Metal seated vs resilient seated gate valves

Before the resilient seated gate valve was introduced to the market, gate valves with a metal seated wedge were widely used. The conical wedge design and angular sealing devices of a metal seated wedge require a depression in the valve bottom to ensure a tight closure. Herewith, sand and pebbles are embedded in the bore. The pipe system will never be completely free from impurities regardless of how thoroughly the pipe is flushed upon installation or repair. Thus, any metal wedge will eventually lose its ability to be drop-tight. 

A resilient seated gate valve has a plain valve bottom allowing free passage for sand and pebbles in the valve. If impurities pass as the valve closes, the rubber surface will close around the impurities while the valve is closed. A high-quality rubber compound absorbs the impurities as the valve closes, and the impurities will be flushed away when the valve is opened again. The rubber surface will regain its original shape securing a drop-tight sealing. 

 

Gate valves with rising vs non-rising stem design

Rising stems are fixed to the gate and they rise and lower together as the valve is operated, providing a visual indication of the valve position and making it possible to grease the stem. A nut rotates around the threaded stem and moves it.Non-rising stems are threaded into the gate and rotate with the wedge rising and lowering inside the valve. They take up less vertical space since the stem is kept within the valve body. 

 

Gate valve is one of the most popular valves in all industries. It has a wide range of applications such as:

● Paper and Pulp

● Water system and water treatment

● Mining

● Power plants

● Chemical, food and beverage, oil and gas, etc.

Wesdom gate valve can customize different styles of gate valves such as low temperature, high temperature and high pressure for you according to your different working conditions. At the same time, Wesdom gate valves can be made of different materials, which can be better used in your industry.

As a top gate valve manufacturer in China, Wesdom is willing to help you choose the right gate valve to provide you with better performance.

To learn more about valves, please consult Wesdom online professional engineers.