1. The material selection of good price and quality rubber sealing ring is not suitable.
The material of the good price and quality rubber sealing ring does not match the medium being conveyed. During operation, the sealing elements are quickly corroded, dissolved or worn, thus losing their sealing ability. Therefore, selecting the material of the mechanical seal according to the nature of the conveying medium is a prerequisite for ensuring its sealing function and normal life.
2. The flushing condition of the good price and quality rubber sealing ring does not meet the design requirements.
When transporting media that is easy to crystallize or has fine particles, a certain pressure and a certain flow of flushing liquid are required for flushing, otherwise the crystals or particles will accelerate the wear of the sealing pair, and affect the automatic compensation of the sealing pair after wear and leakage occurs. Therefore, according to the nature of the conveying medium, it is not only necessary to configure the corresponding flushing pipeline, but also to install instruments and devices with monitoring and adjustment functions to ensure that the pressure and flow of the flushing liquid meet the design requirements, so as to maintain the normal operation of the mechanical seal. This is often ignored by users.

3. The working pressure of the good price and quality rubber sealing ring exceeds the bearing value.
There is a limit to the pressure that each good price and quality rubber sealing ring can withstand. Due to the inaccurate measurement of the pressure in the sealing cavity, the pressure in the sealing cavity exceeds the pressure that the good price and quality rubber sealing ring can withstand. Leakage is also one of the common causes of seal failure.