Symptom
Cause
Remedy
System-related vibrations (resonance) Seek assistance
Temperature in pump too high
Flow too little
Increase min. flow (open discharge
valve, bypass)
Pump and/or pipes not completely fil-
led with liquid
•
Fill
•
Vent
Suction height too big / NPSH of sys-
tem too small
•
Increase liquid level and admis-
sion pressure
•
Reduce resistance in the intake/
suction pipe (change course and
rated width, open shut-off valves,
clean filters)
Temperature in shaft sealing too
high
Lines and roughness at shaft
Replace parts
Deposits on mechanical seal
•
Clean
•
Replace mechanical seal if nec-
essary
•
If necessary provide additional
rinsing or quench
Temperature at the bearing too
high
Back-pressure too low, discharge too
low
Throttle discharge valve
Flow too big
Reduce flow (throttle discharge valve)
Inner components suffering from wear Replace worn parts
Forces in pipeline too high (pump unit
under strain)
•
Change (support pipes, use
compensator’s, etc.)
•
Is foundation plate/frame proper-
ly cast in place?
Bearing damaged
Replace
Relief fittings insufficient
•
Clean relief openings in impeller
•
Replace worn parts (impeller,
split rings)
•
Adjust in line with the system
pressure/intake pressure given
on ordering
Pump leaking
Forces in pipeline too high (pump unit
under strain)
•
Change (support pipes, use
compensator’s, etc.)
•
Is foundation plate/frame proper-
ly cast in place?
Sealing insufficient
•
Tighten screws
•
Replace sealing
Leakage rate at shaft sealing too
high
Lines and roughness at shaft
Replace parts
Deposits on mechanical seal
If necessary provide additional rinsing
or quench
Impeller out of balance
•
Remove blocks/deposits
•
Replace impeller if broken or un-
evenly worn
•
Check shafts to ensure that they
are running true
Forces in pipeline too high (pump unit
under strain)
•
Change (support pipes, use
compensator’s, etc.)
8.1 Troubleshooting
44
ICB Installation, Operation and Maintenance Instruction
Содержание Goulds Pumps ICB
Страница 1: ...Installation Operation and Maintenance Instruction ICB ...
Страница 2: ......