1. Under the condition of high temperature and high pressure, it still has stable sealing performance. Its special sealing system can ensure high sealing performance from ultra-low temperature to ultra-high temperature. 

2. The three-dimensional eccentric sealing system combined with man-made optimization design makes the opening resistance of the valve small. The sealing surface of the butterfly plate is a conical shape with upward bulge. When the butterfly plate is opened, all points on the circumference of the butterfly plate can be separated from the sealing ring at the same time. The valve closing process is accomplished by elastic compression of the seal ring, 

3. There is no phase sticking between the butterfly plate and the sealing ring. Four. The sealing performance of the valve is not affected by temperature changes