The ceramic material has a small deformation amount and a much higher bonding strength than the metal. Generally, the crystal ionic radius of the ceramic material is small, and the ion electricity price is high, and the coordination number is large. These properties determine the tensile strength of the ceramic material, The compressive strength, modulus of elasticity, hardness, and the like are very high. However, the "brittle" and difficult processing of ceramic itself limits its application range. In the past decade, due to the development and progress of martensitic transformation toughening technology, composite technology and nano-ceramic concept, ceramics have been made " The brittleness has been greatly improved, its toughness and strength have been greatly improved, and the scope of application has been continuously expanded. The application of new ceramic materials in petroleum, chemical, machinery and other fields is very active. The use of ceramic wear resistance and corrosion resistance to make wear-resistant and corrosion-resistant parts instead of metal materials is an important development direction of high-tech materials market in recent years. one.
advantage
· All parts in contact with the medium are structural ceramic materials with high chemical stability and hardness (Rockwell hardness HRC90), second only to diamond. Therefore, the valve has extremely high wear resistance, corrosion resistance and erosion resistance, and has good heat insulation and small thermal expansion.
· The ball is made of advanced grinding equipment and technology. The ball has high roundness precision and good surface quality. After the valve seat is researched, the self-slip property of Zr02 ceramic can be used to achieve good sealing performance.
· It has completely changed the shortcomings of metal hard seal ball valve which is easy to leak, high torque and corrosion resistant surface.
· The good wear resistance of the ceramic makes the valve durable and extremely reliable. It has a long service life and is 2-4 times that of the titanium alloy valve and the Monel valve.
· For high-hardness granular media, or media with soft particles but corrosive, this type of valve has an unparalleled absolute advantage and is the only valve suitable for this type of media.
Characteristics
Fully lined hard seal ceramic valve features:
First, the thickness of the valve shell exceeds the national standard GB, JB and American Standard ANSI standard data requirements, the chemical elements and mechanical properties of the main material meet the requirements of national standards. The three-section structure of the shell is sturdy and the appearance is beautiful.
Second, the chemical element of the valve stem material meets the requirements of national standards, finely ground, and the surface is treated by anti-sintering or quenching and tempering to ensure good mechanical properties and corrosion resistance of the valve stem.
Third, built-in cushion compensation elastic gasket to ensure a stable and good sealing. And in the inclusion of impurities, it is not easy to get stuck and the ball is broken.
4. Fully lined hard seal surface contact ceramic ball valve All contact with medium is structural ceramic material, its chemical stability plus extremely high hardness (hardness HRA88 or above, second only to diamond). Therefore, the ceramic has high compressive strength, high wear resistance, excellent oxidation and corrosion resistance, high temperature resistance and good heat insulation performance.
5. Manufacture and production with precise grinding technology (introduced by Taiwan) and advanced machinery and equipment. The valve structure is simple, the flow path is smooth, and the medium flow resistance is small. The hard-sealed ceramic inner part is composed of six scientific and reasonable designs. The valve ball and the valve seat surface are contacted and processed, so that the ball and the seat R and the outer R are tightly combined, the ball circle has high precision, the surface quality is good, and the whole valve torque is light. The resistance is small and the sealing is zero leakage.
Sixth, application areas: thermal power plants, steel, petroleum, chemical, paper, bio-engineering, and other industries. Applicable to boiler steam, lime slurry, particle-containing seawater transportation, high hardness particles, soft particles and corrosive medium, powder, flue gas desulfurization, ash discharge, slagging, water treatment. Replace materials according to their application and can be used in different temperatures and media.
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