Operating Manual
© Dürr Systems AG
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EcoBell2 SL EC - Rotating Atomizer with External Charging
Operating principle
Document No.: MRA00001EN
Version:: 07
•
As of:: 01/2020
4.3
Functionality
Atomizer without Recirculation
Fig. 3:
Atomizer schematic
WAR Shaft detent
HN1 Main needle valve
KS/KSL1
Rinsing valve
The main needle valve controls the paint flow. When the valve is open
the paint flows with the pressure set in the bell disk.
The rinsing valve closes and opens the rinsing channel of the
atomizer. If the valve is open the section from the main needle to the
nozzle is rinsed followed by the entire bell disk.
The shaft detent locks the turbine shaft. The shaft must be blocked
before the bell disk can be removed.
At the front end of the atomizer a bell disk is attached. Paint flow into
the middle of the rotating bell disk. Due to the centripetal forces of the
rotating bell disk the paint flows in an even layer over the edge of the
bell disk. When leaving the bell disk, the paint atomized into fine
droplets.
Nozzles arranged in a ring on the housing blow compressed air onto
the edge of the bell disk. The compressed air (control air) hits the
paint droplets and propels them towards the surface to be painted on
the work piece.
After leaving the bell disk, the paint droplets are getting charged in the
electrostatic field of the electrodes. The surface of the work piece to
be painted is earthed. The drops are, therefore, attracted to the
surface.
