The main seal is packing rings (direct use of flexible graphite paper pressed), spiral wound gasket, packing and asbestos products common metallic materials used in the flexible graphite are available instead. Based on the excellent performance of flexible graphite material, Highland asbestos sealing material largely means a huge potential market of flexible graphite material. Flexible graphite material in the short term can not completely replace asbestos sealing materials, a huge potential market capacity. Graphite due to its special structure, and has the following special properties: 1) high temperature resistance: graphite melting point of 3850 ± 50 ℃, boiling point 4250 ℃ high carbon graphite price, even after ultra-high temperature graphite arc burning, weight loss is very small thermal expansion coefficient is small. Graphite strength with temperature increase and strengthen Qingdao graphite wholesale, at 2000 ℃, the graphite strength doubled. 2) electrical conductivity, thermal conductivity: graphite conductivity higher than the average non-metallic minerals a hundred times. Thermal conductivity than steel, iron, lead, metal materials. Thermal conductivity decreases with increasing temperature, even at very high temperatures, graphite as a thermal insulator. Graphite is capable of conducting graphite because each carbon atom other carbon atom only three covalent bonds are formed, each carbon atom remain a free electron to transfer charge. 3) lubrication: lubrication performance graphite depends on the size of the graphite flake graphite, flake bigger, the smaller the coefficient of friction, lubrication performance is better. 4) Chemical stability: graphite at room temperature, good chemical stability, to acid, alkali and corrosion resistance to organic solvents. 5) Plasticity: graphite, toughness, and can be crushed into thin flakes. 6) thermal shock resistance: graphite used at room temperature can withstand dramatic changes in temperature without damage to live, when sudden changes in temperature, change in volume of less graphite, will not crack. Qingdao graphite | Sea Dragon Carbon Co. (certified) | graphite by Carbon Co., Ltd. Weifang Sea Dragon. Weifang Sea Dragon Carbon Co., Ltd. (www.longmentanye.com) Shandong Weifang, graphite and carbon products leader, over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In the North Sea Dragon carbon industry leadership with the staff warmly welcome all inquiries negotiations to create the North Sea Dragon carbon industry a better future.