Everything You Need to Know About Graphite Packing

You can get easily confused with graphite fiber packing with carbon fiber packing. The terms carbon fiber and graphite fiber can be used interchangeably, even by graphite packing manufacturer. In manufacturing braided packing’s we use both the products and they both consists of relatively good chemical and temperature resistant properties.

Few Properties of Carbon and Graphite Fibers

Carbon fibers generally consist of excellent strength and toughness and are very less expensive to manufacture. However, compared to graphite carbon fiber-based packing’s are generally tougher and to abrasive media, they are more resistant. They can even handle the higher compressive loads that are needed for high-pressure services.

Graphite packing China fibers can make their approach to the strength of carbon, but they have improved lubricity and are not so abrasive. At higher shaft speeds with less leakage, the operation of Graphite is performed but it only happens when formed into packing that is used to seal rotating shafts. Compared to carbon fibers graphite packing has better thermal conductivity. It indicates that they can better dissipate any frictional heat that is generated. High shaft speed services, such as boiler feed pumps; these properties make them ideally suitable for clean media.

By the raw materials, these property differences are primarily created, from which the fibers are made.

One major thing is that graphite fiber typically has a carbon content of more than 95 percent. Graphite fibers are very close to the purity and properties of crystalline graphite, whereas carbon is far less crystalline; hence it is often called amorphous. From carbon atoms, a lump of coal and a fine diamond is prepared, but you will find a difference in their elemental structure. For different reasons, this makes them both valuable.

In fiber form polyacrylonitrile (PAN), rayon, or petroleum pitch fibers are organic polymers that are heated, initially in the air in certain cases and then in furnaces to high temperatures without air so that it can prevent oxidation during processing. The graphite packing fibers are heated again after the process of carbonization to much higher temperatures so that their crystalline nature, carbon content, and purity are enhanced.

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