The development of oil and natural gas on land and sea has gradually increased the demand for oil refining, ethylene and the three major synthetic materials. This requires a large number of oil and gas pipeline gathering equipment and large and efficient petrochemical equipment, focusing on the development of desert, Marine large-scale oil exploration and drilling and production equipment, therefore, for the petrochemical equipment supporting and maintenance of bearings, mechanical seals and packing static seals and other market annual demand will have a greater growth. Suitable for harsh environment of high temperature sealing type alum roller bearing, this bearing is characterized by rubber seals on both sides, to ensure that the bearing raceway in a dust-free environment safe operation, to prevent grease leakage, with dust, water, high temperature and high pressure resistance, heavy load and other advantages, there are also open and suitable for specific applications of high temperature bearing, Continuous and safe operation at -40 to 200 degrees is an attractive feature that cannot be replaced in many demanding applications.