1. Reasons: the middle shaft and the intermediate gap is too large
Solution: change the intermediate shaft and intermediate, reduce the gap
2. Reasons: too much traffic
Solution: check the pipeline have stolen goods, stolen away
3. Reasons: the depth of immersion in the suction pipe is not enough, there is an air suction pump
Solution: increase the immersion depth of the suction pipe
4. Reasons: suction pipe is too small or debris clogging
Solution: change the appropriate line, clear debris
5. Reasons: the valve is too small
Solution: change the appropriate valve diaphragm pump
6. Reason: seal seat ring serious wear or corrosion?
Solution: change the new seal seat
7. Reasons: the diaphragm serious wear or severe corrosion?
Solution: new diaphragm for diaphragm pump
