Seals play a key protective role in the petrochemicals industry. They effectively prevent the leakage of harmful chemicals (such as strong acids, strong alkalis, and flammable and explosive media) to avoid environmental pollution and personnel safety hazards. Their corrosion-resistant, high-temperature and high-pressure resistant material properties (such as fluororubber (FKM) and PTFE) can resist the erosion of equipment under harsh working conditions and extend the service life of core components such as pipelines, reactors, pumps and valves. At the same time, seals maintain the stability of medium pressure in hydraulic systems, fluid pipelines and rotating equipment, reduce energy loss caused by leakage, reduce the frequency of equipment maintenance and ensure the stability of continuous production.