EBARA GS Instruction And Maintenance Manual page 20

EN
The pump has no flow
rate
Low flow rate
Water comes out
initially and then stops
abruptly.
20
- Air entering the suction pipe
or seal.
- The pump does not turn.
- The delivery valve is closed
or half-closed.
- The suction head is too
high for the pump.
- The direction of rotation is
not correct.
- Low rotation speed.
- Low voltage.
- Blocking in the bottom
valve or in the filter.
- Impeller is blocked.
- Pipe clogged.
- Air entering the system.
- Leakage in the delivery
pipe.
- Impeller worn.
- Significant head losses in
the system.
- Liquid temperature very
high. The liquid is volatile.
- Cavitation.
- The pump has not been
primed.
- Air entering the system.
- Air bubbles in the suction
pipes.
- The suction head is too
high for the pump.
Instruction and Maintenance Manual
- Check the suction pipe and
mechanical seal.
- Check that the impeller is
free.
- Open the valve.
- Check the project.
- Correct the electrical
connections.
- Measure the RPM with a
tachometer.
- Check the power supply.
- Remove foreign bodies.
- Remove foreign bodies.
- Remove foreign bodies.
- Check and repair the
suction pipe and shaft seal.
- Check and repair.
- Check the impeller.
- Review the project.
- Review the project.
- Seek expert advice.
- Prime the pump correctly.
- Check and repair the
suction pipe and shaft seal.
- Vent the pipes.
- Review the project.