Heater Band Installation - Varian TV 301 Manual De Instrucciones

The screen can be removed as shown in the fol-
lowing figure.
The following figure shows the overall flange di-
mensions with the protection screen fitted on
pump with ISO flange and pump with CFF flange.
All manuals and user guides at all-guides.com
37
TECHNICAL INFORMATION

HEATER BAND INSTALLATION

The heater band model 969-9804 and 969-9803
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
obtain fast and efficient heating.
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.
NOTE
The turbopump must be "baked" only when oper-
ating with an inlet pressure less than 10
and with water cooling.
-4
mbar
87-900-946-01(B)