★、The valve has the exceedingly high wear-proof capability, corrosion resisting, enduring capability, good heat insulation, small thermal expansion. All parts that the medium is made of ceramics. Its chemical stability and hardness are exceedingly high ( Rockwell hardness HRC90 ) 　　★、The ball is processed by advanced polishing equipment that can ensure high circularity, accuracy, good surface quality. The self-lubricating capability of Zr02 ensures the good sealing performance. 　　★、Thoroughly free from the defects that metal hard sealing has such as big torque, non-corrosion-resistant sealing surface. 　　★、Good wear-proof capability of ceramics make the valve hard to wear thus ensured high reliability. The lifespan is 2-4 times of titanium alloy valve and Mengnaier valve. 　　★、The valve fits in granule medium of high hardness, or medium with erosive soft granule. It is also the only valve suitable for this type of medium