Ransburg Aerobell 33 AER5000, AER5001 - Manual (Page 21)

Aerbell 33 Rotary Atomizer - Operation
Ransburg
17 LN-9521-00.4
FLUID VALVE CONTROL
(Trigger, Dump & Solvent)
The fluid valves in the Aerobell 33 are actuated
by an air signal. The air pressure must exceed
70 psi to assure proper actuation of the valve.
Applying air to the valve actuator turns on the fluid
flow for that valve.
The trigger valve controls the paint flow to the bell.
When actuated, paint flows through the valve to
the fluid tube, and into the rear of the bell cup. The
bell must be spinning at least 10,000 rpm when
fluid is turned on to enable the fluid to flow through
the bell paint passage holes and be atomized.
The dump valve controls the paint flow through the
dump line. When actuated, paint flow is directed
to the dump return line. This provides a method
of rapidly removing paint from the incoming line
for cleaning and/or color change. Normally, the
dump valve is not actuated at the same time as
the paint trigger valve since the trigger valve is
intended to cause the fluid to flow to the bell at
the prescribed input pressure.
The solvent valve controls the flow of cleaning
solvent to the bell. When actuated, solvent flows
through the manifold and fluid tube and into the
rear of the bell cup. This provides cleaning of the
inside of the bell cup. The solvent valve is not
triggered at the same time as the paint trigger
valve to prevent solvent from flowing backward
into the paint line.
TURBINE SPEED
Turbine speed is determined by the input pressure
at the rear of the atomizer.
Turbine speed is intended to be closed loop
controlled using the fiber-optic speed transmitter,
located on the turbine manifold. A speed input to
a remote speed controller, such as the Atomizer
Module, is recommended.
W A R N I N G
† Do not exceed the maximum rated in-
termittent operating speed and turbine inlet
pressure (55,000 rpm at approximately 60
psi for the 57mm bell or 55,000 rpm at ap-
proximately 45 psi for the 30mm bell). Ex-
cessive speed may cause air turbine dam-
age or damage to the bell.
!
† The normal fluid flow range is 25-500
cc/minute. During a color change or when
flushing the system, higher flow rates may
be required. However, the maximum flow
rate must not exceed 500 cc/minute to avoid
solvent or paint from flooding into the inter-
nal portion of the air bearing motor assembly
or front shroud.
† High voltage must be interlocked with
the solvent valve to prevent solvent spraying
while high voltage is on.
C A U T I O N !
† The bell rotational speed determines
the quality of atomization and can be var-
ied for various paint flow rates and paint
formulations. For optimum transfer effi-
ciency and spray pattern control, the bell
rotational speed should be set at the min-
imum required to achieve proper atomiza-
tion. Excessive speed reduces transfer
efficiency!
NOTE
W A R N I N G
† When flushing the Aerobell 33, always
flush through the dump valve rather than
the trigger valve. Only use solvent to flush
the fluid tube in the bell. A solvent/air mix-
ture or sequence will cause paint build-up on
the fluid tube.
!