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A dedicated temperature sensor into the heating
jacket will keep the pump temperature at the de-
sired temperature.
NOTE
Please make sure to have a perfect contact be-
tween the heating jacket thermistor and the pump
envelope for a safe and efficient operation.
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.
WATER COOLING KIT INSTALLATION
Two types of water cooling kits are available to be
mounted when the pump is used under heavy load
conditions or when air cooling is insufficient.
The two model part numbers are: 969-9338
(metallic model), and 969-9348 (plastic model).
Model 969-9338
Model 969-9348
CAUTION
The items of the plastic model kit must be assem-
bled as shown in the following figure
The assembled kit must be screwed into the suit-
able holes of the pump body with a recommended
closing torque of 5 Nm.
The water cooling kit 969-9338 has to be connected
to a 3/8" internal diameter flexible water line.
The water cooling kit 969-9348 has to be con-
nected to a 6x8 (internal diameter x external di-
ameter) metric flexible water line.
Cooling may be carried out either through an open
circuit with eventual discharge of the water, or us-
ing a closed circuit cooling system.
The water temperature must be between +10°C
and +20°C, with an inlet pressure between 3 and 5
bar. This allows a flow of about 200 l/h.
The water electrical conductance must be
µ
s/cm. When the conductance is higher, in closed
water circuit, the use of up to 20% of Ethyl-Glycole
is suggested.
29
TECHNICAL INFORMATION
NOTE
≤
87-900-900-01(C)
500
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