TECHNICAL INFORMATION
Switch on the heater while the turbopump is in op-
eration. In the event of turbopump overheat, the
pump will be automatically cut out by the thermis-
tor sensor.
HEATER BAND INSTALLATION
NOTE
The turbopump must be "baked" only when
operating with an inlet pressure less than 10
-4
mbar and with water cooling.
CAUTION
If the chamber of the system is "baked" at a high
temperature, a shield should be installed to pre-
vent thermal radiation heating the high vacuum
flange on the pump. The maximum temperature
allowed for the inlet flange is 120° C.
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.
29
87-900-874-01(B)
