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Pneumatic of heat preservation for cold insulation ball valve with good properties, and pneumatic clamp sleeve insulation ball valve size is consistent with the pipe diameter, and can effectively reduce the pipeline heat loss in the media. Pneumatic insulation ball valve is mainly used in petroleum, chemical, metallurgical, pharmaceutical, food and other kinds of systems, in order to transport under normal temperature solidification of high viscosity medium. Due to the integral structure and insulation ball valve what smaller than the average ball valve, lighter weight, and no leakage, sealed performance is good, the jacket more pressure than casting of solid carbon steel pipe welding is used.