MEGACHEM
11
1) The pump should be made pressureless before attempting to remedy in parts under pressure
2) Please refer KSB
Pump delivers insufficient liquid
Motor overloaded
Excessively high pump discharge
pressure
Bearings overheating
Pump leaks
Excessive shaft sealing leakage
Rough pump running
Excessive temperature rise
inside the pump
Cause Remedy 1)
•
Worn shaft seal Check flushing / sealing liquid
pressure. Renew shaft sleeve. Fit
new shaft seal.
••
Grooving, score marks or
roughness on shaft protection
sleeve / shaft surface.
Renewshaftsleeve. Fit new shaft
seal.
•
The pump runs noisy. Correct the suction conditions.
Align pump. Rebalance rotor.
Increase the suction pressure at
the pump suction nozzle.
•••
Pump set misaligned. Rectify.
•••
The pump is warped or resonance
vibrations in the piping.
Check the piping connections and
pump fixing bolts. Reduce the gap
between the pipe supports, if
necessary. Support piping using
anti-vibration material.
•
Excessive axial thrust 2). Clean the balance holes in
impeller.
••
Too much or too little, or
unsuitable lubricant quality.
Reduce quantity or top up
lubricant, or change lubricant
quality.
•
The specified coupling gap has
not been maintained.
Restore correct coupling gap in
accordance with the data on the
installation plan.
••
The motor is running on two
phases only.
Replace the defective fuse. Check
the electrical connections.
•
The rotor is out of balance. Clean the rotor. Rebalance the
rotor dynamically.
•
Defective bearings. Fit new bearings.
••
Insufficient rate of flow. Insrease the minimum rate of flow.
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