In view of the rubber sealing ring can not withstand high temperature, the sealing material is changed to the sealing material of perfluorinated rubber sealing ring sealing ring, it can Z high temperature resistance is too 200 degrees Celsius, acid and alkali resistance and oil resistance is excellent, that is, in the case of poor cooling effect can still have a long life oh, in the process of actual use, The service life of the O-ring made of imported perfluorinated rubber sealing material is extended by a lot. The only drawback is that it is expensive! Imported fluorine rubber sealing ring made of seals, excellent quality and performance