Gate valve: A gate valve is a valve whose closing member (gate) moves along the vertical direction of the channel axis. It is mainly used for cutting off the medium in the pipeline, that is, fully open or fully closed. Generally, the gate valve cannot be used as an adjustment flow. It can be suitable for low temperature pressure or high temperature and high pressure, and can be based on different materials of the valve. However, gate valves are generally not used in pipelines that transport mud and other media.
advantage:
　　①Small fluid resistance;
　　②The torque required for opening and closing is small;
　　③It can be used on the ring network pipeline where the medium flows in both directions, that is to say, the flow direction of the medium is not restricted;
　　④When fully open, the erosion of the sealing surface by the working medium is smaller than that of the stop valve;
　　⑤The body structure is relatively simple, and the manufacturing process is better;
　　⑥The structure length is relatively short.
shortcoming:
　　①The overall dimensions and opening height are large, and the space required for installation is also large;
　　②In the process of opening and closing, the sealing surface is relatively rubbed by people, and the abrasion is large, even at high temperature, it is easy to cause abrasion;
　　③Generally, gate valves have two sealing surfaces, which adds some difficulties to processing, grinding and maintenance;
　　④Long opening and closing time.

https://www.ld-valve.com/product/european-market/gate-valve/