FLOWTECH flowboost F.V Operation And Maintenance Manual page 20

Noise and vibrations 5a. Rotating part
from the pump unbalanced
5b. Worn bearings
5c. Pump and pipes not
firmly attached
5d. Flow too strong
for the diameter of the
delivery pipe
5e. Functioning in
cavitation
5f. Unbalanced power
supply
5g. Incorrect alignment
of pump-motor unit
Leakage from the 6a. The mechanical seal
mechanical seal has functioned when dry
or has stuck
6b. Mechanical seal
scored by presence of
abrasive parts in the
liquid pumped
6c. Mechanical seal
unsuitable for the type of
application
6d. Slight initial drip
during filling or on first
start-up
In cases 6a), 6b) and 6c), replace the seal, if necessary contact an authorised service center
5a. Check that no solid bodies are obstructing the rotor
5b. Replace the bearings
5c. Anchor the delivery and suction piping as needed
5d. Use bigger diameters or reduce the pump flow
5e. Reduce the flow by adjusting the feeder gate and/or
using pipes with a bigger internal diameter. See point 4g)
too
5f. Check that the mains voltage is right
5g. If necessary, the unit must be re-aligned
6a. 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. See point 5 e) too.
6b. Install a suction filter and use a seal suited to the
characteristics of the liquid being pumped.
6c. Choose a seal with characteristics suitable for the
specific application
6d. Wait for the seal to adjust to the rotation of the shaft.
If the problem persists, see points 6a), 6b) or 6c) or
contact an authorised service center.
20