16
Evobell 3500
OPERATING MANUAL
EDITION 05/2010
PART NO. DOC387841
4.1
FIELDS OF APPLICATION, USING IN ACCORDANCE WITH THE INSTRUCTIONS
EVOBELL 3500
is an air-bearing high-rotation atomizer. The device is suitable for atom-
izing liquid materials, in particular coating materials, under the infl uence of electrostatic.
4
DESCRIPTION
This high-speed rotation atomizer can be used to process both fl ammable liquid coating
materials (solvent-based paints) and non-fl ammable liquid coating materials (water-based
paints).
When using fl ammable liquid coating materials
It is imperative that the high-rotation atomizer be equipped with the resistance block. In
this case the system is classifi ed as Type B-L (W < 350 mJ) in accordance with EN 50176. A
danger thus exists through explosive energy, but no danger through electric shock.
Coating paints, primers, corrosion protection, structure paints, etc. with a specifi c resist-
ance > 50 k
(to WAGNER/Ransburg scale) are suitable for processing. The electrostatic
effect has no effect at strongly conductive materials and at such materials with an exces-
sive electrical resistance, i.e. no „paint wrap-around“ is present on the spray object. The
suitability of the sprayed material with regard to the charging ability can be read from the
actual values for the high voltage (kV) and for the spray current (µA).
e.g.
➞
High kV value, low µA value (no wrap-around) = Paint with excessive electrical
resistance.
➞
Low kV-value, high µA-value (no wrap-around) = Excessive conductivity of the paint.
When using non-fl ammable liquid coating materials
If water paints are used, the entire system (high-rotation atomizer with paint supply) is
brought to high-voltage potential. The system corresponds to Type A-NL (W < 350 mJ) or
Type B-NL (W > 350 mJ), depending on the structure in accordance with EN 50348. If the
system is classifi ed to Type B-NL, a danger exists through electric shock
The complete system must be safely earthed before being accessed by people.
In the event of application problems, contact your WAGNER branch or the paint manufac-
turer.
4.1.1
PROCESSABLE MATERIALS
A large portion of stationary electrostatic paint spray systems are currently being con-
verted to water-based paints. At the same time the fi re and explosion protection of these
systems can be eased considerably, if the water-based paints used can demonstrably be
considered non-fl ammable.
4.1.2
CATEGORIZATION OF WORKING MATERIALS
