1. The card sleeve high-temperature ball valve has low fluid resistance, easy operation, rapid opening and closing, good sealing and reliability, and can be used in the petrochemical, long-distance pipeline and urban heating industries. Widely used.

2. The material of the card sleeve high-temperature ball valve seat is made of polytetrafluoroethylene (or filled with polytetrafluoroethylene), called a soft seal ball valve, and its working temperature does not exceed 200 ° C.

3. The material of the valve seat is metal, known as a hard seal ball valve or high-temperature ball valve, with a working temperature of 350 ° C or higher. In order to meet the requirements of high-temperature working conditions, domestic and foreign ball valve manufacturers have optimized the sealing structure of high-temperature ball valves to significantly reduce their opening and closing torque, significantly extend their service life, and significantly improve their working performance. It has been improved.