Ransburg Aerobell (Std.) Rotary Atomizer A12381 - Manual (Page 45)

To Clean the Fluid Tube and Bell Cup
Using microvalve style manifold, open solvent
valve by applying 70-100 psi (482-689 kPa) air
pressure to valve pilot line. Fluid will flow through
fluid tube into bell cup. Time will be determined
by solvent ability to clean sprayed material. Do
not spray solvent with voltage on! Atomizer must
be spinning at least 10,000 rpm.
Using a CCV valve configuration, apply 50-100
psi (345-689 kPa) air pressure to CCV solvent
valve pilot. Fluid will flow through fluid tube and
into bell cup. Time will be determined by solvents
ability to clean sprayed material. Do not spray
solvent with voltage on! Atomizer must be spinning
at lease 10,000 rpm.
External Atomizer Surface Cleaning
• Verify that the high voltage is turned off.
• All external surfaces may be cleaned using
a mild solvent and lint free rags to hand
wipe. Turbine drive must be off, but leave
bearing air on. The shaping air should have
approximately 70 SLPM air flow through
each to prevent the solvent from entering
these passages.
• Do not spray the unit with a solvent
applicator used for cleaning. The cleaning
fluid under pressure may aid conductive
materials to work into hard to clean areas or
may allow fluids to be forced into the turbine
assembly.
• Do not reuse an atomizer bell cup that shows
any sign of damage such as nicks, heavy
scratches, dents, or excessive wear.
• Always final wipe all parts with a non-polar
solvent and wipe dry (high flash Naphta,
etc.).
Bell Cup Cleaning (Cup Wash)
(Without Cleaning the Incoming
Paint Line)
Turn off the high voltage and trigger valve. With
the bell spinning at 30,000 rpm, turn on the external
solvent valve to allow cleaning solvent to flow
through the manifold passages, through the fluid
tube, and into the bell cup. The spinning bell will
atomize the solvent, clean out the bell passages.
It is always recommended to blow the solvent line
dry after the cleaning operation. Typical bell speed
during the cup flush sequence is 30,000 rpm.
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To reduce the risk of fire or explosion, OSHA
and NFPA-33 require that solvents used for
exterior cleaning, including bell cleaning and
soaking, be non-flammable (flash points high-
er than 100°F/37.8°C). Since electrostatic
equipment is involved, these solvents should
also be non-polar. Examples of non-flam-
mable, non-polar solvents for cleaning are:
Amyl acetate, methyl amyl acetate, high flash
naphtha, and mineral spirits.
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Do not use conductive solvents such
as MEK to clean the external surfaces of
the Aerobell with a second cleaning with a
non-polar solvent.
>
When using a rag to hand wipe the Aerobell,
the turbine air should be off, but leave both the
shaping air and bearing air turned on. Ensure
that rotation has come to a complete stop.
W A R N I N G !
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NEVER wrap the applicator in plastic to
keep it clean. A surface charge may build up
on the plastic surface and discharge to the
nearest grounded object. Efficiency of the
applicator will also be reduced and damage
or failure of the applicator components may
occur. WRAPPING THE APPLICATOR IN
PLASTIC WILL VOID WARRANTY.
W A R N I N G !
Aerobell - Maintenance
41 LN-9264-08.2
Ransburg