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9.3.2 Bag filters
Contamination level of the filter can be controlled by the differential pressure drop (check
every 14 days to 1 month). Reaching the pressure difference indicated in the technical data
sheet cleaning or replacement is required.
Bag filters of class G3, G4 are repeatedly reclaimable. Clean the bags from the dust airside
with a vacuum cleaner. This cleaning can be repeated several times. If this cleaning is not
sufficient, also wet cleaning can be executed. Remove the bag filter, keeping the opening up,
see Figure 139.
Wet cleaning
Rinse the bag with upward opening with a not too strong jet of water. The mud must pass
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flushed through the filter material to the outside. Possibly, add to the water a little bit de-
tergent.
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Let the clean filter bags drain well, they can be remounted wet and immediately put back
into service.
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Clean also the filter section before remounting the filters, check filter tightness and reseal
if necessary.
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Filters can be cleaned 2-3 times then a replacement of the filters is necessary.
Filter elements in the clamping frame must be fitted with four springs per filter. Check air
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tightness!
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Bag filter with class EU5 and above cannot be regenerated and must be renewed after
the first lifetime.
9.3.3 HEPA filters
Contamination level of the filter can be controlled by the differential pressure drop (check
-
every 14 days to 1 month), replace filter if necessary.
Check filter sealing and fastening. The filters clamps have to be tightened evenly. Tighten
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the clamps clockwise in two stages.
Figure 139: Transport of filter bags
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