Bearing over heat ing

1. Too much or too little lubricant

2. Lubricating oil deteriorates

3. The crew is not aligned

4. Vibration

1. Reduce fuel or add fuel

2. Drain and clean the oil pool and add new oil

3.Readjust concentricity

4. Check the balance of the rotor or operate it at a smaller flow rate

Pump cannot pump liquid

1. There is air left in the suction pipe or inside the pump

2. P ipe valve is closed on the inlet or outlet side

3. Operation head is higher than the maximum head of the pump.

4. Air leakage in pump suction pipe

5. The impeller direction of rotation is incorrect

6. The suction height is too high

7. The suction pipe is too small or blocked by debris

8. The speed does not match

1. F ill with liquid; remove air

2. Open the valve

3. Replace the pump with high er head

4. Eliminate leakage on the import side

5. Correct the rotation direction of the motor

6. Lower the installation height of the pump

7. Increase the diameter of the suction pipe and clear the blockage

8. Make the motor speed meet the requirements

Insufficient flow and head

1. Damaged impeller

2. Excessive wear of the sealing ring

3. Insufficient speed

4. The inlet or outlet valve is not fully opened

5. Air leaks into the suction p ipe

6. There is a blockage in the pipe

7. The medium density does not match the pump requirements.

8. The device head does not match the pump head.

1. Replace with new impeller

2. Replace the sealing ring

3. Increase the speed as required

4. Fully open

5. Seal the leakage well

6. Eliminate blockages

7. Recalculate or replace the motor with appropriate power

8. Try to lower the installation height of the pump

Severe seal leakage

1. Improper selection of sealing component materials

2. The friction pair is severely worn

3. The rotating and stationary rings are unevenly matched

4. The friction pair is too large and the stationary ring is broken.

5. O-ring damaged

1. Explain the medium conditions to the manufacturer to provide appropriate seals

3. Readjust the sealing assembly

4. Replace the stati onary ring so that the verticality error with the shaft is less than 0.10, and install the seal assembly as required.

5. Replace the O-ring

Pump vibrates and makes noise

1. The center lines of the pump shaft and the motor shaft are not aligned

2. Shaft bending

3. Bearing wear

4. Cavitation occurs in the pump

5. Friction between rotating parts and fixed parts

6. Rotating parts lose balance

7. There is debris blocking the pipeline or pump.

8. The inlet valve is not fastened

1. Adjust to alignment

2. Replace with new oil

3. Replace bearings

4. Consult the manufacturer

5. Repair the pump or improve its usage

6. Check the cause and try to eliminate it

7. Check the sewage discharge

8. Open the inlet valve and adjust the outlet valve

Motor overload

1. The pump and motor are not aligned

2. The relative density of the medium becomes larger

3. Friction occurs in rotating parts

4. The device resistance becomes lower, making the operating point tend to be at a higher flow rate.

1. Adjust the alignment

2. Change the operating process

3. Repair friction parts

4. Check the pressure of the suction and discharge pipelines and adjust them accordingly.