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HEATER BAND INSTALLATION
The heater band model 969-9808 and 969-9807
can be used to heat the pump casing when a
bakeout is needed.
The heater band is applied to the upper part of the
pump casing, as shown in the figure, and heats it
to a temperature of about 80° C.
The heater band must be mounted such that there
is perfect thermal contact with the pump wall to ob-
tain fast and efficient heating.
Switch on the heater while the turbopump is in op-
eration. In the event of turbopump overheat, the
heater will be automatically cut out by the thermis-
tor sensor.
The turbopump must be "baked" only when operat-
ing with an inlet pressure less than 10
with water cooling.
! ! ! !
If the chamber of the system is "baked" at a high
temperature, a shield should be installed to prevent
thermal radiation heating the high vacuum flange
on the pump. The maximum temperature allowed
for the inlet flange is 120° C.
29
TECHNICAL INFORMATION
NOTE
-4
mbar and
CAUTION
87-900-878-01(C)
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