1. The use temperature of the seal exceeds the specified value

2. Use excessively high online speed conditions to cause carbonization to form leaks

3. If the pressure is too high, the hardness of the seal is small and it is squeezed out of the metal groove

4. Used in the medium whose PH exceeds the specified value, the seal is softened or dissolved

5. The hardness is too high, and the seal cannot completely fill the metal groove

6. The size of the seal does not match the groove

7. Long-term wear and tear

8. The storage time of the seals exceeds the quality guarantee period, and aging causes leakage