Ransburg Turbodisk Applicator Assembly A11376 - Manual (Page 17)

Turbodisk Applicator - Operation
12
The heater should be set as low as possible, sufficient
to maintain the applicator surface temperatures
above the dew point in the booth.
Example: Only with the incoming air temperature at
72 °F (22.2°C), a disk rotating unloaded at 30 krpm has
a turbine outlet temperature drop of approximately
28 °F (-2.2°C) (@ 40 krpm unloaded, DT ~ 14°F (-.10°C)
). Referring to the ASHRAE Psychrometric chart, the
saturation temperature range (dew point) of a spray
booth maintained at 70-75 °F / 65-70% RH is 62-68°F
(21.1-23.9 °C / 76-70° RH is 16.7-20°C). Thus, it is
almost certain that the surface temperatures of the
applicator will fall below the dew point of the booth,
and an air heater will be needed in this case.
To prevent condensation, an air heater assembly
should be assembled after air filters. (Reference the
current “Air Heater Assembly” service manual for
further information.)
> Failure to use an air heater may cause
damage to equipment or ruin the finished
component being processed.
NOTE
COATING MATERIALS
The Turbodisk can be used with a broad range of
coating material conductivities. However, with wa-
terborne paints, it may be necessary to isolate the
paint supply from ground.
FLUID FLOW CONTROL
(Refer to Figures 14 and 15)
Fluid flow control is dependent on the valve con-
figuration of the Turbodisk . If the Turbodisk is con-
figured with no valves or a 3-way valve, fluid flow
is controlled externally at the paint source. If the
Turbodisk is equipped with a regulator, fluid flow
can be controlled via the air pilot signal. The high
flow and low flow regulators each have procedures
on how to control and deliver consistent fluid flows.
For more information on controlling the fluid delivery
using regulators, refer to that specific manual which
is included with the system.
To check fluid flow rates, the disk must be removed.
See the "Maintenance" section for "Removal Proce-
dure". The fluid can then be manually triggered to
measure actual flow in a graduated beaker over a
specified time period.
> Isolated fluid supplies using either
waterborne or highly conductive solvent
base coatings can produce hazardous high
voltage discharges which can cause fires or
injury to personnel.
W A R N I N G
!
> Danger of shock and/or personal injury
can occur. Proper grounding procedures,
which are outlined in the ITW Ransburg safety
bulletins, must be followed. Personnel must
never work near or perform work on the
turbine when the turbine is spinning or when
high voltage is on.
W A R N I N G
!
AA-07-02.1