Research on the reasons why pneumatic diaphragm pump cannot pump liquid
There are many reasons why the pneumatic diaphragm pump cannot pump liquid, and we need to investigate and solve them according to the specific situation. Only in this way can the stable operation of the pneumatic diaphragm pump be ensured and production efficiency improved. Here I will summarize the reasons why the pneumatic diaphragm pump cannot pump liquid as follows:
1. Be careful not to connect the inlet and outlet of the pump backwards. The inlet of the pump is at the bottom and the outlet is at the top. The wearing parts in the pump body of the pneumatic diaphragm pump are worn. In this case, it is easier to solve the problem. Just replace the wearing parts.
2. If the source of the air compressor is too low, the air volume will be insufficient (normal air pressure is 5-7 kg); if the specific gravity of the liquid is too large, or the concentration is too large, the suction lift of the pump cannot be reached, so in this case, the pump is working, But the liquid cannot be dispensed.
3. The air source pressure at the air inlet is not enough. Generally, the air source pressure range of domestic pneumatic diaphragm pumps is generally 2-7kg. If it is greater or less than this value, the pump will not work properly; the liquid inlet pipeline is not well sealed. In this case, the pump It is working normally, but because it cannot absorb liquid, the pump cannot pump out liquid.
4. The valve ball and ball seat in the pump body of the pneumatic diaphragm pump are not well sealed, and the liquid that is pumped out immediately flows back. In this case, the liquid is discharged from the pump body, but the flow rate is very small and the head is very low.
