Ransburg Vector R Series Cascade 79523 R90 Waterborne - Manual (Page 17)

Vector R Series Cascade Applicators - Introduction
Ransburg
GENERAL DESCRIPTION
The Vector TM R90/70 Spray Applicator process
is an air-atomized method for electrostatically
applying product coatings. The Vector R90/R70
Spray Applicator system applies a high voltage
DC charge to the applicator electrode, creating
an electrostatic field between the atomizer and
the target object.
Vector™ R90 Cascade Spray Applicator (see
Figure 1) applies a -85 kV DC charge to the coating
materials at the point of atomization. The Vector™
R70 Cascade Spray Applicator applies a -65 kV
charge. This electrostatic charge allows a more
efficient, uniform application of coating material to
the front, edges, sides, and back of products. It is
highly suitable for applying coatings to a variety of
surface configurations: large targets, small parts,
tubular wares, concave and recessed parts, etc.
Because it is a grounded fluid system (for solvent
based systems), it is highly suitable for applying
a wide range of solvent reduced coatings such
as enamels, lacquers, epoxies, etc. The 79523
model is available to accommodate waterborne
materials.
A regulated pressure fluid system delivers coating
material to the atomizer. At the time of triggering
the applicator, fan and atomization air is introduced,
which atomizes the coating material into a spray
mist. The atomized spray particles under the influ-
ence of the electrostatic field become electrically
charged. The charged particles are attracted to,
and deposited on, the target object. The forces
between the charged particles and the grounded
target are sufficient to turn most normal overspray
around and deposit it on the back surface of the
target. Therefore, a high percentage of the coating
is deposited on the target.
One of the many features of the Vector R90/70
applicator system is that the electrical energy,
which is available from the resistive charging
electrode, is limited to the optimum level of safety
and efficiency. The system is incapable of releas-
ing sufficient electrical or thermal energy during
normal operating conditions to cause ignition of
specific hazardous materials in their most easily
ignited concentrations in air.
The control unit or power supply provides voltage
output to the applicator and contains controls for
AC on/off, high voltage adjust, and displays kV
and µA in real time.
As the applicator electrode approaches ground,
the control unit and applicator circuitry cause the
high voltage to approach zero while the current
approaches its maximum value.
† When more than one waterborne appli-
cator is fed from a common isolated fluid
supply, there is a potential for electrical ener-
gy discharge through any other applicators
when one applicator is triggered. Depend-
ing upon the system capacity, this discharge
could be hazardous. It is best to only install
one applicator per isolated supply.
W A R N I N G !
13
INTRODUCTION
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