Carbon Graphite Seals

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Carbon Graphite Seals
Posting date : Oct 19, 2009
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Carbon graphite is featured with good corrosion resistance, high thermal conductivity, low co-efficient of friction, good self-lubrication, and low co-efficient of expansion. It can be molded into seal rings, carbon graphite bearings, and graphite friction disc in all kinds of shapes and specifications. It is a pretty ideal choice as auxiliary friction mater for mechanical seal. Carbon graphite seals and rings are widely used in aerospace technology, marine technology, petroleum, chemical industry, mechanical engineering, metallurgy and other fields. A good mixture would be 80% carbon and 20% graphite. Graphite is a good conductor of heat, a natural lubricant, and has a laminar grain structure similar to a deck of cards, allowing the individual grains to slide over one another. It is this laminar structure that allows the graphite to release from the carbon or graphite face and deposit on the hard face in the same manner. To manufacture the finished products, we place this mixture in an oversized mold using a hydrocarbon as the glue to hold the powder together. The mixture is then compressed and placed in an oven at 2000° Fahrenheit (1000° C) for a period of thirty to sixty days. The hydrocarbon will convert to carbon at this temperature. The piece must be heated slowly or otherwise the carbon will combine with oxygen to form carbon monoxide, or carbon dioxide which will, in either case, ruin it. CHINATUNGSTEN ONLINE is a specialist in supplying all kinds of mechanical seals, such as carbon graphite seal, tungsten carbide ring, seal and silicon carbide seal. If there are something you need, please do not hesitate to e-mail us by sales@chinatungsten.com

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