New ceramic material application in large diameter valve
At present our country industry production widespread used valve is metal valve, metal valve usage has hundreds of years history, although meantime through structure and material improvement, but by metal materials own limitations and can not adapt to the high wear, strong corrosive such bad working environment needs. Mainly reflects on short service life, leakage greatly influenced the stability of system operation. Traditional metal valve need to revolutionize from materials, design and manufacturing technology aspects.
Advanced ceramic materials as a new material of 21st century, has been paid more and more attention by scientific workers, it is applied to industrial valve is a bold and beneficial innovation.
Ceramic material deformation volume is small, has much higher bond strength than metal, usually composed of ceramics crystal ion radius is small, and ion electrovalence is high, big ligand, these quality decides the ceramic materials anti-pull strength, compressive strength and elastic modulus, hardness, etc are all high. However ceramic itself "fragile" and difficult-to-machine restricted its applicable scope, nearly ten years, due to martensite transformation toughening technology, composite materials science and technology and nano ceramic concept development and progress, has made ceramics brittleness greatly improved and its toughness and strength has been greatly improved, applicable scope is expanding.
In recent years, new ceramic materials in petroleum, chemical, machinery and other areas application is very active, using ceramic wear resistance and corrosion resistance production wear-resisting corrosion parts instead of metal materials, is one of the important developing direction in last few years high-tech materials market. Ceramic application process need to solve the following key questions:
Solve ceramic brittle problem, improve ceramic toughness, Control shrinkage rate and improve ceramic material firing finished product rate, developed high temperature kiln, develop ceramic processing equipment, realize ceramic parts and metal body precision cooperation. Tianjin Shengkai industrial technology development Co.,ltd has researched and sloved the above key question. After trying batch production, widely used in electric power, metallurgy, chemical industry many industries such manufacturers.
Ceramic valves have great social and economic benefits:
1． Using high technology new ceramic structure material produced valve sealing parts and vulnerable parts, improves valve wear resistance and corrosion and sealing, greatly extend the valve service life.
2． Ceramic valve usage can reduce the number of maintenance and replacement, improve equipment operation system security, stability and reduce the labor intensity, saving equipment repair expenses.
3． Ceramic valve usage can improve the industrial piping system sealing, also can maximize prevent leakage and to play positive promote effect for environment protection.
4． Making ceramic raw materials is wide and low cost, using aluminium, carbon, silicon and other common elements can produce the superior performance of ceramic materials, can save a lot of metal materials and rare mineral resources.
Wear-resisting ceramics valve is mainly used in electric power, petroleum, chemical, metallurgy, mining, sewage treatment, and other industrial areas, especially to face high wear, strong corrosion, high temperature and high pressure such bad working environments, show its outstanding performance. It can satisfy the high wear, strong corrosive environment, especially
prominent feature is long service life and its performance price ratio is far superior to other similar metal valve. Along with the science and technology unceasing development and progress, ceramic materials from recipes, molding and processing and assembly process and so on various aspects technology is more sophisticated and complete, ceramic valve with its superior performance is more accepted by professional persons. Using making ceramic valve successful experience can also popularize to wider engineering field.
