Heating jacket ball valve is a kind of heating jacket ball valve, use to keep media cold preservation or heat preservation, has high performance insulation structure, mainly use for heating high temperature and keep the medium stay liquid. Design feature such as compact wafer type structure, short distance between the valve seat and the end flange, low medium retention, large volume heat preservation, superior sealing performance and long service life etc. Heating jacket ball valve usually used for the medium that easily solidified thus can not flow at normal atmospheric temperature, such as chocolate, grease, benzene, sulfur，molten sulphur, asphalt, bitumen, wax, polyurethane, resin, fatty alcohol etc.