Bertolini GIARDINAGGIO Serie Manual De Uso Y Mantenimiento página 68

The term MESH means the number of openings per linear inch of wire gauze. For
example, a 32 MESH filter will have 32 holes per linear inch of the filter gauze.
If the MESH value is squared (e.g. 32² = 1024), the result is the number of holes per
square inch. Thus, the greater the mesh value is, the greater the filtering capacity of the
filter will be.
Always install 32 mesh cartridges and oversized filters if chemicals in powder form or
very thick fluids are used, so as to allow for a greater safety margin against clogging
during the treatments.
Remember that the best results are not always achieved by using a filter with a high MESH
value.
For example, if water is drawn from a ditch with 80 MESH filter, the pump suction side
could become very quickly clogged and throttled, thus preventing it from functioning
correctly.
It is therefore advisable to use pump suction filters with a filtering capacity that is not
particularly high, but correctly proportioned to the pumped fluid.
If a duct that completely empties the tank is used, make sure that the filter is serviced
frequently, since the impurities that settle on the bottom could lead to clogging.
It is also advisable to affix stickers and notices in clearly visible places, so as to warn the
user that the filter must be frequently serviced.
The filter cartridge must be cleaned whenever the tank is refilled. This ensures that the
filtering surface is always in the best condition. Scaling or particularly thick products could
settle and reduce the area where the liquid is able to flow through, thus throttling the
passage.
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