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MVA 02 rev 5 - December 2017
8.6
Filters and pressure gauges
If the fan is fitted with filters for the intake fluid, these must be periodically cleaned so as to prevent increases
of load loss at the intake, which would reduce fan performance.
Checks and any necessary cleaning operations must be carried out at predetermined intervals. It is however
advisable to use a differential pressure gauge to monitor the pressure gap caused by the filter. This gap
must be no more than 400 Pa.
CAUTION:
Do not exceed the pressure value of 400 Pa, to avoid causing possible damage to the filter
and the consequent sucking in of filter materials by the fan.
8.7
Flexible anti-vibration joints between the fan and ducting
Flexible joints located between the fan and exit and/or intake ducting must be checked visually to ensure that
they are undamaged and that no flexible components have become detached. If these joints must be
dismantled for maintenance of the system and/or the fan, they must be reassembled taking the precautions
indicated for the first assembly/installation (see paragraph 5.5).
8.8
Checking and cleaning parts in contact with fluids
Periodic impeller cleaning makes it possible to avoid vibrations caused by any dust deposits that accumulate
during fan operation.
If the fan is to be used to move fluids that are even slightly dusty, the impeller must be
checked periodically for cleanness and/or wear.
Deposits of material or wear on some impeller parts can produce abnormal fan vibrations.
If there are parts that are excessively worn, it is essential to replace the impeller (for this operation contact
the
FVI
Technical Service).
For all information and for any modifications to be made on our products, please contact the
FVI technical office in advance, specifying the machine type and serial number given on the
fan identification plate.
