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Inline sewage pump failures and maintenance - ZJBetter

The sewage pump is a kind of energy-saving sewage pump which has been successfully developed by domestic and foreign advanced technology. The pump has the characteristics of non-blocking design, enterprise unit wastewater discharge, urban sewage treatment plant discharge system, sewage drainage station in residential area, subway, basement, civil defense system drainage station, hospital, hotel, high-rise building sewage discharge, municipal engineering, drainage of mud in construction site, sewage discharge from farms and irrigation of rural farmland, water supply device for water plant, mine exploration and water treatment equipment matching.

The four aspects of the pipeline sewage pump are not started and operated, the insufficient flow, the large vibration, and the overload is analyzed as follows:



Inline sewage pump causes

Inline sewage pump troubleshooting

Inline sewage pump cannot start and run

Low Voltage

Increase the voltage or use it after the voltage increasing.

Wire has broken circuit

Check the fuse and wiring, and replace it

The impeller is stuck by debris

Debris Removal

No axial clearance between the two coupling halves and jamming

Adjust the axial clearance between the two half couplings to 0.5 mm

Impeller close to volute

Reassembly, separate the impeller and volute

Nut off and flat key damage makes the impeller slip

Install flat keys and nuts

Coupling flat key damage

Change flat key

Inline sewage pump insufficient flow 

Motor speed is lower than rated speed

Increase motor speed

The suction port is blocked, the mud pit is not deep, and the pump can not suck the mud.

Remove the suction block and move the pump so that the volute is completely buried in the mud and manure

The mud pipe is blocked

Check the pipe and take out the blocker

The medium is too thick

Dilute the medium to increase the supply

Large leakage

Check the cause of the leak and replace the part that caused the leak

Impeller broken

Exchange the impeller

large head, long delivery

Reduce the head, shorten the delivery distance

Opposite direction of turning

Change the motor rotation direction

Debris around the impeller

Debris Removal

Inline sewage pump noise and vibration

High liquid temperature

Lower liquid temperature

A hard object in the working fluid

Control the size of the pump debris, increase dense filter

Air infiltration

Deep volute

Debris in the volute

Debris Removal

The nut is loose

Tighten the nut

peller and volute friction

Check the pump assembly and adjust it

The bearing is damaged or less oil

Change bearings or refuel

The pump shaft is not concentric with the motor and the shaft is bent

Adjust the concentricity, correct the axis



Concentricity change, bearing damage, shaft deformation

Correct parts, change bearings

Improper assembly of the pump parts, difficulty in turning, foreign objects stuck

Reassemble, remove foreign objects

Opposite direction of turning

Change the motor rotation direction

low head, large flow

Try to avoid long-term use