The BQ673/674F(PPL, M)-16 pneumatic thermal insulation ball valve produced and sold by Huadian Pump Valve has good thermal insulation characteristics, and the diameter of the valve is consistent with the pipe diameter, and at the same time can effectively reduce the heat loss of the medium in the pipeline. It is mainly used in petroleum, chemical, metallurgy, pharmaceutical, food and other systems to transport high-viscosity media that will solidify at room temperature. Due to the use of integral structure, the thermal insulation ball valve is smaller than the general ball valve, lighter in weight, and no leakage, the sealing performance is good, and the jacket is welded with carbon steel pipe than casting.