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PROBLEM
Noise and vibrations from
the pump
Leakage from the
mechanical seal
PD WATER SYSTEMS - 3000 W. 16 Ave. Miami, FL 33012. TEL: (954) 474 9090 FAX: (954) 889 0413
www.pdwatersystems.com |
POSSIBLE CAUSE
Rotating part unbalanced
Worn bearings
Pump and pipes not firmly attached
Flow too strong for the diameter of the
delivery pipe
Functioning in cavitation
Unbalanced power supply
Incorrect alignment of pump-motor unit
The mechanical seal has functioned
when dry or has stuck.
Mechanical seal scored by presence
of abrasive parts in the liquid pumped.
Mechanical seal unsuitable for the
type of application.
Slight initial drip during filling or on first
start-up.
SOLUTION
Check that no solid bodies are obstructing the rotor.
Replace the bearings.
Anchor the delivery and suction piping as needed.
Use bigger diameters or reduce the pump flow.
Reduce the flow by adjusting the feeder gate and/or using pipes
with a bigger internal diameter. Try to close the feeder gate
partially and/or reduce the difference in level of the pump and
the liquid being aspirated.
Check that the mains voltage is right
If necessary, the unit must be re-aligned
Replace the seal, if necessary contact an authorized service
center.
Make sure that the pump casing (and the suction pipe if the
pump is not self-priming) are full of liquid and that all the air
has been expelled.
Replace the seal, if necessary contact an authorized service
center.
Reduce the flow by adjusting the feeder gate and/or using pipes
with a bigger internal diameter.
Install a suction filter and use a seal suited to the
characteristics of the liquid being pumped.
Replace the seal, if necessary contact an authorized service
center.
Choose a seal with characteristics suitable for the specific
application
Wait for the seal to adjust to the rotation of the shaft. If the
problem persists.
Make sure that the pump casing (and the suction pipe if the
pump is not self-priming) are full of liquid and that all the air
has been expelled.
Install a suction filter and use a seal suited to the
characteristics of the liquid being pumped.
Choose a seal with characteristics suitable for the specific
application.
Or contact an authorized service center.
pdwatersystems
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