What are the characteristics of flexible graphite gaskets?
Flexible graphite gaskets are perforated or cut from pure graphite sheets. They have good corrosion resistance, high/low temperature resistance, good compression resilience and high strength, and various round shapes and complexities. Geometric gaskets are widely used in pipes, valves, pumps, pressure vessels, heat exchangers, condensers, generators, air compressors, exhaust pipes, refrigerators, and the like.
Flexible graphite, also known as expanded graphite, is made of scaly graphite and chemically treated to form interlaminar compounds. At a high temperature of 800-1000 ° C, the interlayer compound turns into a gas, which expands the scale graphite by about 200 times, becomes like heat conduction of cotton, and overcomes the disadvantage of brittleness, thereby exhibiting good sealing property. Loose and flexible. Working under high temperature, high pressure or radiation conditions, no decomposition, deformation or aging, chemical stability. The birth of flexible graphite declares that the old-fashioned era in the field of chemical sealing will end. Flexible graphite has the following distinct advantages over asbestos gaskets:
First, no radiation and no pollution. Flexible graphite does not contain harmful ingredients, while asbestos products are harmful to the human body and can also pollute the environment.
Second, high temperature resistance. The flexible graphite reinforced composite gasket is resistant to high temperatures of 1650 ° C, and even if the chemical equipment melts, it is still safe. When the asbestos product is at 500 ° C, the internal crystal water will be decomposed, so that it will be powdered and lose its efficacy.
Third, a wide range of applications. In addition to strong oxidizing acids, flexible graphite is resistant to most chemical media, including radioactive chemical media, while asbestos products are poorly adaptable and cannot be used in radioactive media. Some chemical towers, heat exchangers, etc. require that the joints are not insulated, flexible graphite can be done, and slate products cannot.