Actions for troubleshooting
Malfunction Cause Remedy
Leakage in the
pump body, the
connections, the
mechanical seal.
1.
Pump is strained (causing leaks at the pump body
or at the connections).
2.
Housing seals and connection seals defective.
3.
Mechanical seal soiled or sticky.
4.
Mechanical seal worn.
5.
Surface of shaft or shaft sleeve shrunk.
6.
Elastomer unsuitable for the pumped fluid.
1.
Install pump without strain, support piping by fixed
points.
2.
Replace housing seals and/or connection seals.
3.
Check and clean mechanical seal.
4.
Replace the mechanical seal.
5.
Replace shaft or shaft protection cover.
6.
Use suitable elastomer for pumped fluid and
temperatures.
Impermissible
temperature
increases to
pump, gear unit
or motor
1.
Air in suction line or pump. Suction head too high,
NPSH system (supply) too low.
2.
Bearings have too little, too much or inappropriate
lubricant.
3.
Motor protection switch is defective or not set
properly.
4.
Pressure valve closed.
1.
Vent and prime suction pipe or pump. Raise
suction side liquid level, fully open the stop valve in
the suction line.
2.
Add, reduce or replace lubricants.
3.
Check the setting, replace the motor protection
switch if necessary.
4.
Open pressure valve.
10.4 Repair
10.4.1 Repair order
Compliance with legal regulations on occupational safety requires all commercial
companies to protect their workers and the people and the environment from
harmful impacts when dealing with hazardous substances.
Follow local laws, regulations and guidelines.
Certificate of non-objection
The certificate of non-objection (Section 12.2, Page 71) attached to this
document is part of the inspection/repair order. Nevertheless we reserve the right
to reject the acceptance of this order for other reasons.
HILGE products and their parts are therefore inspected/repaired only if the
certificate of non-objection completed properly and completely by authorised and
qualified personnel is submitted.
Pumps that have been operated with radioactive substances are not accepted at
all.
If, despite careful emptying and cleaning of the pump, safety precautions are
required, the necessary information must be given.
Malfunctions / repairs
Repair
BA.280.YYY.001.GB_4
50 21.02.2022
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