What is a flexible graphite gasket
Flexible graphite, also known as expanded graphite, uses scale graphite as raw material and undergoes chemical treatment to produce interlayer compounds. At a high temperature of 800-1000 ° C, the interlayer compound becomes a gas, which expands the flake graphite by about 200 times, and becomes like cotton, which has the advantages of heat conduction, overcomes the shortcomings of brittleness, and thus shows good sealing. Loose and porous, full of elasticity. Working under high temperature, high pressure or radiation conditions, without decomposition, deformation or aging, the chemical properties are stable. Compared with asbestos gaskets, Bird sealed flexible graphite has the following advantages:
1. No radiation and no pollution. Flexible graphite does not contain harmful ingredients, and asbestos products will affect human health and environmental pollution.
2. High temperature resistance. Byrd BD series flexible graphite reinforced composite gasket can withstand the high temperature of 1650 ℃, even if the chemical equipment is melted, the gasket is also difficult to be affected. However, most asbestos products will decompose the internal crystal water and cause failure in the environment above 500 ℃.
3. Wide range of application. In addition to strong oxidizing acids, flexible graphite can withstand most chemical media, including radioactive chemical media. In some special circumstances where asbestos products cannot be used, Bird flexible graphite can be used. In the case of wider performance and use, there is no pollution.
4. Easy and fast to use. The gasket factor of flexible graphite is only half of that of asbestos products, that is to say, to achieve the same sealing effect, the force of tightening the screws can be much smaller.
In addition to the above obvious characteristics, flexible graphite also has the characteristics of excellent sealing performance, excellent compressive elasticity, oxidation resistance, etc. It has strong self-lubricity and plasticity, as well as good conductivity, large specific gravity and high density. It can produce all kinds of pipes and flange gaskets for adjusting diesel engines and compressors.
Flexible graphite gasket is punched or cut from pure graphite plate, it has good corrosion resistance, high / low temperature resistance, good compression resilience and high strength, a variety of round complex Geometric gaskets are widely used in pipes, valves, pumps, pressure vessels, heat exchangers, condensers, generators, air compressors, exhaust pipes, refrigerators, etc.
Graphite composite gasket
Graphite composite gasket, also known as flexible graphite metal-reinforced composite gasket or high-strength graphite gasket, is a kind of seal formed by composite pressing of punched metal tooth plate or punched metal core plate, wire mesh and flexible graphite particles Gaskets are usually made of flexible graphite composite reinforced plates.
Graphite metal composite board is composed of metal core board and flexible graphite coil material, which has two types of punching type and bonding type. Bird seal can punch various gaskets, which is a wide range of application and strong sealing performance The ideal sealing material.
Graphite composite gasket has good corrosion resistance, high / low temperature resistance, radiation resistance, good compression resilience and high strength, the required pretension is smaller than that of metal gaskets and metal spiral wound gaskets. The surface requirements are not high, it is a relatively economical and practical gasket. Bald Seal adopts the encapsulated form to maintain the excellent performance of the original graphite composite gasket, and is easy to install and disassemble, not easy to damage, and also can prevent the media and the outside air from eroding the gasket, improving the temperature resistance Pressure resistance. Compared with pure flexible graphite gaskets, graphite composite reinforced gaskets have higher strength and can be used in more severe working environments.
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