Common Faults and Causes of AODD Diaphragm Pumps

I. Diaphragm Pump Diaphragm Damage: Incomplete purging of the gas supply, containing 

trace amounts of foreign matter, causes pressure fluctuations as the gas propels the liquid, 

creating air hammer. This uneven stress on the diaphragm leads to rupture. Alternatively, the 

medium's solid content may exceed standards, such as excessive particulate matter, causing 

valve jamming and pump pressure issues. This sudden increase in stress on the diaphragm can

 then cause it to rupture.

II. Diaphragm Pump Motor Overload During Operation: Diaphragm pumps are either pneumatic

 or electric. If this problem occurs in an electric diaphragm pump, consider the possibility of sudden

 jamming of internal flow components. This is common when handling media exceeding transport 

standards, such as liquids with higher viscosity or excessive solid particulate matter. This can cause

 blockages in the pump's piping or valves. Once blocked, the motor's continuous operation is hindered, 

increasing current and causing overload.

3. Diaphragm pump cannot start normally: If the diaphragm pump does not respond when starting, 

it is considered that the normal operation system of the pump cannot be completed. It is necessary to 

check the connecting bolts of the pump body and shaft to see if they are loose or broken. It is also

 necessary to check the condition of the air distribution valve and the pilot valve to avoid foreign objects

 blocking them. It is also possible that the shaft sleeve is severely worn or the diaphragm is damaged. 

These inspections need to be carried out step by step, and the unsuitable parts should be replaced.