
TROUBLESHOOTING
CONDITION
CAUSE
POSSIBLE REMEDY
Seals Leaking
Seal incorrectly installed
Reinstall seal
Seal worn or damaged
Replace seal
Reduced capacity
Rotational speed too low
Check supply voltage
Vacuum leak
Locate and repair
High sealant temperature
Check coolant flow and temperature
Check heat exchanger cleanliness
Incorrect sealant flow rate
See “Sealant flow rate” section in KLRC
manual
Excessive noise
Defective bearing
Replace bearing
Too much sealant liquid
Decrease flow rate
Coupling misaligned
Align coupling
Cavitation
Open attenuating valve or reset
vacuum relief valve to increase flow
Overheating
Defective bearing
Replace bearing
High sealant temperature
Check coolant flow and temperature
Suction open to atmosphere
Adjust isolation valve
Excessive vibration
Coupling misaligned
Realign coupling
Pump not properly anchored
Anchor
See excessive noise
Check inlet pressure and gas flow
Motor overloaded
Excessive back pressure
Reduce height of pump discharge
Too much sealant liquid
See table in KLRC manual for proper
flow rate
Misalignment
Realign motor and pump
Defective bearing
Replace bearing
Abnormal bearing wear
Misaligned pump assembly
Realign pump and motor
Accumulation of rust or scale
See “Operation and Maintenance”
section of KLRC manual
Foreign object in pump
Dismantle pump and remove foreign
object
Mechanical Seals squeal
Insufficient cooling liquid
Increase coolant flow to seal, check
compatibility of sealant
Impeller binding or will not turn
NOTES:
11