Advantages and disadvantages of various valves——gate valve

1. Gate valve: gate valve refers to the valve whose closing part (gate) moves along the vertical direction of the channel axis. It is mainly used as the cutting medium on the pipeline, that is, fully open or fully closed. Generally, the gate valve cannot be used to regulate the flow. It can be applied to low temperature and pressure, high temperature and high pressure, and can be made according to different materials of the valve. However, gate valves are generally not used in pipelines conveying mud and other media

advantage:

① Low fluid resistance;

② The torque required for opening and closing is small;

③ It can be used in the loop network pipeline where the medium flows in two directions, that is, the flow direction of the medium is not limited;

④ When fully open, the erosion of the sealing surface by the working medium is smaller than that of the stop valve;

⑤ The shape structure is relatively simple and the manufacturing process is good;

⑥ The length of the structure is relatively short.

Disadvantages:

① The overall dimension and opening height are large, and the installation space is also large;

② In the process of opening and closing, the sealing surface is relatively rubbed by people, with large friction loss, and it is even easy to cause scratch at high temperature;

③ General gate valves have two sealing surfaces, which adds some difficulties to processing, grinding and maintenance;

④ Long opening and closing time.