Introduction to Common Valves: Gate Valve
Gate valve refers to a valve with a closing member (gate) that moves vertically along the axis of the passage. It is mainly used in pipelines to cut off the medium, either fully open or fully closed. Generally, gate valves should not be used to regulate flow. They can be used for low temperature and
Gate valve refers to a valve with a closing member (gate) that moves vertically along the axis of the passage. It is mainly used in pipelines to cut off the medium, either fully open or fully closed. Generally, gate valves should not be used to regulate flow. They can be used for low temperature and pressure as well as high temperature and pressure, depending on the material of the valve. Knife gate valves, also known as slurry valves, are suitable for conveying media with high solid content, such as in pipelines for transporting slurry.
Advantages:
1.Small fluid resistance;
2.The required torque for opening and closing is small;
3.It can be used on loop piping where the medium flows in two directions, meaning the flow direction of the medium is not restricted.
4.When fully open, the sealing surface is less eroded by the working medium than the globe valve.
5.The body structure is relatively simple, and the manufacturing process is good.
6. The structure is relatively short.
Disadvantages:
1.The exterior dimensions and opening height are large, requiring a larger installation space.
2.During the opening and closing process, there is relative friction on the sealing surface, resulting in significant wear and even abrasion, especially at high temperatures.
3.Generally, gate valves have two sealing surfaces, which adds some difficulties to processing, grinding, and maintenance.
4. Long opening and closing time.
Model example:
PZ73F-10C represents a fluorine-sealed manual knife gate valve, "F" indicates that the sealing surface material is fluoroplastic, "10" indicates the pressure resistance level of the valve body is 1.0mPa, and "C" indicates that the valve body material is carbon steel.
