EBARA GS - Page 20

- 20 -
Power surge
- The voltage is low or the imbalance
between the phases is high.
- The head is too low, or the flow rate is
too high
- 50 Hz pump is being used at 60 Hz.
- Foreign bodies inside the pump.
- The mechanical seal was not fitted
correctly.
- Bearings damaged.
- Friction in the rotation areas. The shaft is
bent.
- The direction of rotation is not correct.
- The density and/or viscosity level of the
liquid is high.
- Check the power supply.
- Partially shut off the delivery
valve.
- Check the nameplate details.
- Remove foreign bodies.
- Fit it correctly.
- Replace the bearings.
- Repair in specialist workshop.
- Check and correct the
connection.
- Review the project.
The bearings are
overheating
- Bearings damaged.
- In operation for a long time with the valve
closed or half-closed.
- Replace the bearings.
- Avoid such a situation; Open the
valve or stop the pump.
Excessive operating
vibration and noise.
- Fault in installation.
- Bearings damaged.
- Flow rate too high.
- Flow rate too low.
- Impeller is blocked.
- The direction of rotation is not correct.
- Friction in the rotation areas. The shaft is
bent.
- Cavitation.
- Vibrations in the piping.
- Check installation.
- Replace the bearings.
- Reduce the aperture of the
delivery valve.
- Increase the aperture of the
delivery valve.
- Remove foreign bodies.
- Check and correct the
connection.
- Repair in specialist workshop.
- Seek expert advice.
- Replace the piping or fit an
inverter.
Excessive water leakage
from the shaft seal.
- Defective fitting of the mechanical seal.
- The mechanical seal is damaged.
- Overpressure in delivery.
- The shaft is bent.
- Fit it correctly.
- Replace the mechanical seal.
- Review the project.
- Repair in specialist workshop.