Insulation ball valve with good thermal insulation properties

Existing technology in the field of thermal insulation ball valve is also called the jacket ball valve, is on the basis of the ball valve welding metal jacket, jacket and the valve body between thermal channel, channel and injecting steam or other heat medium, to ensure that the media can work normally in the valve. Insulation ball valve with good insulation properties, and the valve and pipe diameter, and can effectively reduce the pipeline heat loss in the media. 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 valve seal structure and its corresponding sealing material, its use is less than the temperature of 200 ℃. And for a long time at 200 ℃ under the condition of use, live shorter lives. Although seat can choose short time ability 300 ℃ high strength graphite materials, but there are many need to seal in the valve parts still cannot seal in high temperature situation, especially in the radial sealing, high strength graphite materials not suitable for radial seal. Usually radial sealing insulation ball valve is to use o-ring sealing structure, so use temperature of the valve directly restricted by o-ring used temperature, the thermal insulation ball valve on the use of o-ring is fluorine rubber, and the use of fluorine rubber temperature within 200 ℃, and cannot be used within the limit temperature for a long time. Far cannot satisfy the requirement of market in many media, such as the working medium of rosin, it demands the use of thermal insulation ball valve temperature is 300 ℃, such ability is helpful for medium to obtain ideal liquid rosin, using o-ring as traditional sealing parts, will not be able to meet their requirements.