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 struture ceramics with high chemical stability and hardness (HRC90) only inferior to diamond.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. Excellent wearproof property of ceramic enables this valve have reliability and prolonged lifespan, 2-4 times of that of Titanium Alloy and Monel valve. The ceramic ball core has high degree of hardness, high strength, high resistance to wear and good antiseptic property, beats down any kind of that of the current anticorrosive wear-resisting alloy material, might also apply in other situations like strong corrodes and the strong attrition fluid medium switch or control and so on.The valve fit in granule medium of high hardness, or medium with erosive soft granule. It is also the only valve suitable for this type of medium. They are widely used in petrochemical industry, metallurgy,mining, power station, medicine and papermaking and so on.