1Poly tetra fluoroethylene,polymer compound made from tetrafluoroethylene, which has excellent chemical stability and corrosion resistance, is one of the best materials for corrosion resistance in the world. 2PTFE lining can bear high temperature and high pressure, corrosion resistance, almost insoluble in all solvents, physical inert. 3The working temperature can reach 250 degrees centigrade, even if the temperature drops to -196 C, it can maintain 5% elongation. 4With high temperature resistance, Insulation resistance, Ultra corrosion resistanc, Anti-pollution, High lubrication. 5It is widely used in new materials, energy, environmental engineering and other fields of scientific research and experiments, is university teaching, scientific research units commonly used small reactors.