Medium-consistency pump MC
STANDARD, C-01-000000
Rev. 0, 2010.02.09 OPERATION Kap.6 , Seite 10 of 12
GRZ-2698572-v1-Operation.FM
Excessive noise and/or
vibration
Unexpected air/gas content in
pumping medium
Check the conditioner
Vortex formation in the stand
pipe
Correct (increase) level in
stand pipe
Impeller is clogged Check the entire centrifugal
pump for clogging
Flow resistance in the pipe is
greater than the delivery head
generated at the pump
Check the resistance in the
pipework and the valve
settings
The pump flow rate is below
the permitted minimum level
Check the requirements of the
pump system
The foundation is not suitable New foundations should be
made
Insufficient support for the
pipework and/or the stand
pipe
Check the support for the
pipework and the standpipe,
reinforce if necessary.
Pump and motor are not in
true alignment
Check pump/motor alignment
or re-align
Shaft is broken or running off
centre (centrifugal pump,
vacuum pump, conditioner)
Replace the shafts and
bearing assembly
Rotating objects or pump parts
causing friction in the pump or
the conditioner
Disassemble and check the
inside of the pump and/or
remove the conditioner
Pump parts coming into
contact with pressure are
worn, damaged or clogged
Check the pump and change
any worn or damaged parts if
necessary
Bearing worn or loose Disassemble the pump and
replace the bearings if
necessary
Insufficient or excessive
lubrication
Check that pump has
appropriate lubrication
Impeller damaged or
unbalanced
Disassemble the pump and
replace the impeller if
necessary
Malfunction Possible cause Remedy
Tab. 6-7 Operating malfunctions and troubleshooting
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