Reasons and solutions for horizontal multi-stage pump not filling water
The multi-stage pump is an ordinary general-purpose mechanical equipment and is widely used. However, the water pump sometimes suddenly fails to pump out water during use. So what are the reasons why the multi-stage pump cannot pump out water? The editor below will tell you the reasons why the multi-stage pump cannot pump water and how to deal with it.
Horizontal multi-stage water pump
Reasons why the multi-stage pump cannot pump water and how to deal with it:
1. The air in the multi-stage pump is not exhausted or the vacuum is not enough.
Judgment Method:
Approach :
a. Drain the air in the pump, check whether the water is diverted for irrigation, whether the pipes are leaking, and whether the packing leakage is too large;
b. Check whether the pipeline is leaking, whether the packing is leaking, whether the vacuum pump is normal, and whether the water pressure of the jet air pump is normal;
2. The inlet pipe is blocked and the bottom valve is blocked.
Judgment Method:
The vacuum degree of the vacuum gauge reaches below -0.2;
When the exhaust valve or exhaust hole is opened, no liquid flows out;
Treatment methods :
Inspection, cleaning, pipeline filters, filters, foot valves, gate valves.
3. The motor rotation direction is incorrect and the motor and pump are not connected.
Judgment Method :
Approach:
a. Change the direction of motor rotation;
b. Connect the coupling pin.
4. The packing leaks and the mechanical seal leaks greatly, causing air leakage.
Judgment Method :
Check whether the packing is dry, whether the shaft sleeve is worn,
and whether the mechanical seal is worn;
Approach :
a. Replace the packing or sleeve and apply butter on the packing;