8 Faults
8.1 Faults
Faults may result from inadmissible modes of operation. Such inadmissible modes of operation –
even brief ones – may cause serious damage to the unit.
In connection with explosion protection, potential sources of ignition (overheating, electrostatic and in-
duced charges, mechanical and electric sparks) can result from these inadmissible modes of operation;
their occurrence can only be prevented by adhering to the intended use.
See also
6.5 Inadmissible modes of operations and their consequences (examples) on page 26
.
Should there be any uncertainty about the remedy to be applied, please inquire at the in-house pump
office or at the pump manufacturer's.
No delivery:
•
Is the pump filled and vented?
•
Is the suction line open, vented, cleaned and correctly laid?
•
Is the discharge line open, vented, cleaned and correctly laid?
•
Is the geodetic head too high?
•
Is air being drawn in?
•
Has the magnetic drive stopped?
Flow rate too low:
•
Have the pump, suction line and discharge line been completely vented, filled and cleaned?
•
Have any strainers installed been cleaned?
•
Are all shut-off devices closed?
•
Is the geodetic head too high?
•
Is the NPSHA too low or the NPSHR too high?
•
Are the pipe resistances too high?
•
Is the viscosity too high?
•
Is the direction of rotation correct?
•
Is the speed too low or the impeller diameter too small?
•
Are pump parts worn?
•
Gas in the medium?
Flow rate too high:
•
Is the geodetic head too low?
•
Are the pipe or nozzle resistances too low?
•
Is the pump speed too low or the impeller diameter too large?
Delivery pressure too high:
•
Is the speed too high or the impeller diameter too large?
•
Is the density too high?
Motor consumes too much electricity:
•
Is the flow rate, density or viscosity too high?
8 Faults
Model ICM/ICMP Magnetic Drive Chemical Process Pump with Grease Bearing Lubrication Installation, Operation, and
Maintenance Manual
33
Summary of Contents for Goulds Pumps ICM
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