(Additiv) KEMPER Dosing Unit for Pre-coating (Additive)

A. Application and Mode of Operation
We recommend to add pre-coating power type DCH 100 to the extracted air after each
cleaning cycle, this in particular to clean the filter cartridges from problematic oil-containing
dusts and fumes.
The pre-coating powder creates a layer on the surface of the filter cartridges and this is
helpful during filtering of welding smoke containing oil or adhesives. Superfine oilmist is
absorbed and adhesive particles are held back from real filter surface itself.
The air can pass unhindered through this layer which is generated by the powder.
Furthermore the filter cartridge can be cleaned very easily as soon as a particular
differential pressure has been reached.
The KEMPER dosing unit is adding the pre-coating powder by a compressed air blow out
(4 - 6 bar) of an injector nozzle. This procedure will be actuated by the control unit in the
extraction and filter unit. The unit is equipped with a joggle device to ensure an even slipping
of the pre-coating powder. The pre-coating powder is pulverized by the compressed air blow
and is blown into the extraction part of the unit via a hose. The powder is dispersed on the
surface of the filter cartridges, exactly to the place where also harmful substances are lead to.
The powder and the harmful substances can mix optimal.
Attention!
• The unit indicates by an acoustic signal if a certain liquid level
of the filter pre-coating powder is underrun.
• The dosing unit has to be refilled if the powder supply is not sufficient.
You can achieve an automated and discontinous adding of the pre-coating powder
by the KEMPER dosing unit.
Adding of the pre-coating powder is done:
• shortly after switching on of the filter unit (because an automatic cleaning cycle has been
done after switching off the unit and there is no protection layer of pre-coating powder on
the filter cartridges any more.)
• after each cleaning cycle of the filter cartridges during operation, in order to generate
a new protection layer.
• after a certain period of operation, in order to avoid a saturation of the pre-coating
powder with problematic dusts and smokes.
Together with the air stream the hazardous substances are lead via a ducting into the
extraction and filter unit.
Information:
The pre-coating DCH 100 is highly hygroscopic and it is essential to keep this powder dry.
The dosing unit may only be installed inside a building. Furthermore the pre-coating powder
should be taken out of the dosing unit during longer periods of non-operation
(e.g. during plant holidays).
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