7. When the valve is fully opened or closed, the sealing surfaces of the ball and the valve seat are relatively isolated from the medium, so when the medium can pass through, it will not cause bad damage to the sealing surface, ensuring certain safety; 　　

Moreover, the current pneumatic ball valve has the function of insulation, fire prevention and self cooling. There is a temperature control material in the equipment itself, which can transfer temperature. The friction between parts in production will produce temperature, and long-term operation will increase the internal temperature of the machine. At this time, the temperature control system required can transfer and reduce the temperature, so that the subsequent operation of the machine will not be affected.