Gate Valve knowledge: Gate valve Summary

In many valves,Gate valve application is the most widely used one.Gate Valve closure means (gate) to move along the vertical direction of the channel axis of the Gate valve in the pipeline is mainly used as a cutting medium, that is fully open or fully closed to use.

Generally can not be used as a regulator Gate valve flow. Gate Valve can be applied to low temperature and pressure can be applied to high temperature and pressure, and depending on the material of the Gate valve for a variety of different media, but are generally not used in pipeline transportation valve mud and other particulate medium.
The advantage is that the Gate valve flow resistance is small, indented mouth of the flow resistance and flow resistance despite similar short. With diversion holes plate Gate valve installed in the pipeline can be carried out directly with the pig pigging. Since the shutter sliding surfaces in the two seats, so the liquid can be applied to flat gate dielectric with suspended particles, the sealing surface of the plate Gate valve is actually automatic positioning. Gate Valve seat sealing surface will not be damaged thermal deformation. And even when the Gate valve closed in the cold state, hot elongate stem does not make the sealing surface being overloaded. At the same time when the Gate valve is closed, no diversion holes plate valve gate closed position nor the requirements of a higher accuracy, and therefore the electric plate valve can be used to control the opening and closing stroke position. Since many advantages gate, so using a wide range.
Typically caliber greater than DN50 pipe cutting medium as means would prefer to use the Gate valve, even some small opening in the pipeline is still preserved by the current use. There are various forms of Gate valve structure, the main difference is the structure of the sealing element takes the form. According to the structure of the sealing element, often divided into several different types of valves, while the common form of flat gate valves and wedge gate valves, according to the structure of the Gate valve stem can be divided into the lift rod (? Rod) and a rotary valve lever (dark bar ) valve.

Source: http://www.gmkvalve.com