Gate valves have the characteristics of low fluid resistance, minimal impact erosion on the sealing surface, no change in the flow direction of the medium, no disturbance to the flow, small pressure array, and small opening and closing torque. They are suitable for a wide range of pressures and temperatures and are a common type of shut-off valve. They are widely used for connecting or cutting off media on oil and steam pipelines in petroleum, chemical, and thermal power plants (they cannot be used as throttling valves). Gate valves can be configured with various molded gate structures (solid, flexible, and split) to best meet the requirements of specific application environments.