The development of sea and land oil and natural gas has gradually increased the demand for refining, ethylene and three major synthetic materials. This requires a large number of oil and gas pipeline gathering equipment and large-scale high-efficiency petrochemical equipment, focusing on the development of large-scale oil exploration and drilling equipment in deserts and oceans. Therefore, the bearings and mechanical seals and fillers for petrochemical equipment are matched and repaired. The annual market demand for seals, etc. will increase significantly. Suitable for high temperature sealed spherical roller bearings in harsh environments. This type of bearing features rubber seals on both sides to ensure safe running of the bearing raceways in a dust-free environment and to prevent grease leakage. It has the advantages of dustproof, waterproof, high temperature and high pressure, heavy load, etc. It is also available in open type and high temperature resistant bearings for specific applications. It can operate continuously and safely under the condition of -40 to +200 degrees. This is attractive. The characteristics cannot be replaced in many demanding applications.