Coating Materials; Description Of Unit; Airless Process; Functioning Of The Unit - WAGNER Super Finish 21 Betriebsanleitung

Description of unit

2.2 Coating materials

Processible coating materials
i Pay attention to the Airless quality of the
coating materials to be processed.
Dilutable lacquers and paints or those containing sol-
vents, two-component coating materials, dispersions, la-
tex paints, façade paints, roof and attic coatings, fire and
corrosion protection material.
No other materials should be used for spraying without
WAGNER's approval.
Filtering
In spite of the suction filter, the insertion filter in the spray
gun and the high-pressure filter obtainable as accessory,
filtering of the coating material is to be recommended in
general.
Stir coating material before commencement of work.
Attention: Make sure, when stirring up with
i
motor-driven agitators that no air bubbles
are stirred in. Air bubbles disturb when
spraying and can, in fact , lead to interrup-
tion of operation.
Viscosity
With this unit it is possible to process highly viscous
coating materials of up to around 25.000 mPa·s.
If highly viscous coating materials cannot be taken in by
suction, they must be diluted in accordance with the
manufacturer's instructions.
Two-component coating material
The appropriate processing time must be adhered to
exactly. Within this time rinse through and clean the unit
meticulously with the appropriate cleaning materials.
Coating materials with sharp-edged additional
materials
These have a strong wear and tear effect on valves,
high-pressure hose, spray gun and tip. The durability of
these parts cane be reduced appreciably through this.
3. Description of unit

3.1 Airless process

The main areas of application are thick layers of highly
viscous coating material for large areas and a high con-
sumption of material.
A diaphragm pump takes in the coating material by suc-
tion and conveys it to the tip. Pressed through the tip at
a pressure of up to a maximum of 250 bar (25 MPa), the
coating material is atomised. This high pressure has the
effect of micro fine atomisation of the coating material.
As no air is used in this process, it is described as an
AIRLESS process.
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This method of spraying has the advantages of finest
atomisation, cloudless operation and a smooth, bubble-
free surface. As well as these, the advantages of the
speed of work and convenience must be mentioned.

3.2 Functioning of the unit

In the following there is a short description of the techni-
cal construction for better understanding of the function.
WAGNER Super Finish 21 and 23 are electrically driven
high-pressure spraying units.
The electric motor (fig. 2, item 1) drives the pump by
means of a toothed belt (2).
In the pump the diaphragm (3) is moved up and down by
means of hydraulic oil.
The inlet valve is opened independently through the
downward movement of the diaphragm.
The outlet valve is opened by means of the upward
movement of the diaphragm. The coating material flows
under high pressure through the high-pressure hose to
the spray gun. The coating material is atomised when
flowing out of the tip.
The pressure regulating valve (4) controls the operating
pressure and the quantity of the conveyed coating mate-
rial.
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2
4
1
Super Finish 21 • 23