1. The abnormal operation

When installing or reassemble the end plate, end infiltration leakage caused by abnormal operation

2. Natural aging

As the using time of sessions, sealing ring there are natural aging.

Proposal: when changing the membrane element, the sealing ring, in a timely manner to replace aging sealing ring.

3. Pressure shell by mechanical damage

When stress shell caused by mechanical damage mechanics performance degradation, shell lesions appear the phenomenon of leakage will happen.