At present, metal materials are widely used in the manufacturing of valves. The using of metal valves has a history of hundreds years, it has been through the improvement of structure and material, but still has its own limitation, that is, it can't meet the requirement of strong wear and corrosion conditions. Metal valve has a short service life and its seriously leakage has a strong impact on the stability of operation. Traditional metal valves need to have a fully reformation of material, design and manufacturing technology.
The using of large diameter aeration butterfly valve in industrial valve field.
As a new material in twenty-first century, advanced ceramic is valued by more and more scientific workers. It is a bold and helpful innovation to apply ceramic in industrial valves. Ceramic has a small deformation, which has higher adhesive strength than metal. Generally, the crystal ion of ceramic has a small radius, high electrovalence and large coordination number. These properties decide that ceramic has a high tensile strength, compressive strength, elasticity modulus and hardness. However its friableness and difficult processing have limited its application. Nearly ten years, the development and progress of compound material technology, nano ceramics conceptions have greatly improved friableness, tenacity and intensity of ceramic, which expanding the scope of application.
Wear resisting ceramic valve are mainly applied to power, petroleum, chemical engineering, metallurgy, mining and sewage disposal industrial fields. Its outstanding performance can be seen especially under the harsh conditions of strong wear and corrosion, high temperature and pressure. It can be used in strong wear and corrosion conditions, its outstanding feature is has long service life, which is far more better than metal valves of its kind. With the continuous development and progress of technology, ceramic techniques of formula, forming, processing and assembling have become more mature and and complete. Ceramic
valve and its excellent performance have been recognized by insiders. The successful experience of using ceramic to manufacture valves can be applied to broader engineering field.
