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Three-way ball valve is a rotary valve with L-type or T-type runner structure, widely used in petroleum, chemical, natural gas, metallurgy, electric power, papermaking, food, medicine, water supply and drainage and other working conditions. The valve is suitable for water, oil, gas, steam, acid and alkali solutions and other media, with excellent sealing performance and corrosion resistance. Three-way ball valves can be rotated through 90 ° or 180 ° to achieve media diversion, merging or flow direction switching, compact structure, low flow resistance, opening and closing flexible, support for manual, pneumatic, electric and other drive methods to meet the needs of automation control. Its product advantages include reliable sealing, strong pressure resistance, long service life, easy maintenance, and can maintain stable operation under high pressure, large flow and frequent switching conditions. Three-way ball valves are able to realize multiple flow path functions on a single device, significantly reducing the number of pipelines and valves, which is an ideal solution for efficient and economical fluid transportation and system integration.