gate:Gate valve refers to the valve whose closing member (gate) moves along the vertical direction of the channel axis. It is mainly used to cut off the medium on the pipeline, that is, fully open or fully closed. In general, gate valves cannot be used to regulate flow. It can be applied to low temperature pressure or high temperature and high pressure, and can be used according to different materials of the valve. However, gate valves are generally not used in pipelines that transport mud and other media.Advantages: 1. Small fluid resistance; 2. Less torque required for opening and closing; 3. It can be used on the ring network pipeline where the medium flows in two directions, which means that the flow direction of the medium is not restricted; 4. When fully opened, the sealing surface is affected by the working medium. The erosion of the valve is smaller than that of the globe valve; ⑤ The body structure is relatively simple, and the manufa...