THE RANSBURG
ELECTROSTATIC
VECTOR AA90 PROCESS
This is a combined air/airless method for electro-
statically applying coatings to objects. The
Vector
AA90
system applies a high voltage DC charge to
the applicator electrode, creating an electrostatic
field between the electrode and the grounded tar-
get. The target is electrically grounded through its
support which may be either stationary or moving.
A regulated high pressure fluid system delivers
coating material to the fluid nozzle and is atomized
by passing through an orifice under pressure.
The atomized spray particles become electrically
charged under the influence of the electrostatic
field surrounding the nozzle. The air supply to
the applicator aids in shaping the coating material
into a desired pattern. 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 sur-
face of the target. Therefore, a high percentage
of the coating is deposited on the target.
One of the many features of the Vector AA90
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
.
INTRODUCTION
>
When more than one waterborne
applicator is fed from a common isolat-
ed fluid supply, there is a potential for
electrical energy discharge through any
other applicators when one applicator is
triggered. Depending upon the system
capacity, this discharge could be hazard-
ous. Install only one spray applicator per
isolated fluid supply system.
W A R N I N G
!
The power supply provides voltage output to the
applicator and contains controls for AC on/off,
high voltage adjust, "one touch" triple setpoint,
and displays kV and µA in real time.
As the applicator electrode approaches ground,
the power supply and applicator circuitry cause
the high voltage to approach zero while the current
approaches its maximum value.
Vector AA90 Applicators - Introduction
11
AH-07-01.10
