Technical Information; Description Of The Tv 301 Navigator; Pump Description - Varian TV 301 Manual De Instrucciones

DESCRIPTION OF THE TV 301 NAVIGATOR

The TV 301 Navigator pumping system consists of
a pump with a dedicated controller fixed to it. The
system is available in various models that differ in
the high vacuum flange and the controller.
The TV 301 Navigator pump models are:
− Model 969-8918 with ISO 100 high vacuum
flange;
− Model 969-8919 with ConFlat 6" external di-
ameter high vacuum flange;
− Model 969-8920 with ISO 160 high vacuum
flange;
− Model 969-8921 with ConFlat 8" external di-
ameter high vacuum flange.
The TV 301 Navigator kit eight models are:
− Model 969-8824 with ISO 100 high vacuum
flange and 24 Vdc controller;
− Model 969-8825 with ConFlat 6" external di-
ameter high vacuum flange and 24 Vdc
controller;
− Model 969-8826 with ISO 160 high vacuum
flange and 24 Vdc controller;
− Model 969-8827 with ConFlat 8" external di-
ameter high vacuum flange and 24 Vdc
controller;
− Model 969-8828 with ISO 100 high vacuum
flange and 120/220 Vac controller;
− Model 969-8829 with ConFlat 6" external di-
ameter high vacuum flange and 120/220 Vac
controller;
− Model 969-8830 with ISO 160 high vacuum
flange and 120/220 Vac controller;
− Model 969-8831 with ConFlat 8" external di-
ameter high vacuum flange and 120/220 Vac
controller.
The controller is also available in two models:
− 24 Vdc controller: model 969-8972;
− 120/220 Vac controller: model 969-8973.
The following figures show the eight kit models.

Pump Description

The pump consists of a high frequency motor driv-
ing a turbine fitted with 8 bladed stages and 3
Macrotorr stages. The turbine rotates in an anti-
clockwise direction when viewed from the high
vacuum flange end.
The turbine is made of high-strength aluminium
alloy, machined from a single block.
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TECHNICAL INFORMATION

Model 969-8921
Model 969-8827
Model 969-8831
Model 969-8918
Model 969-8824
Model 969-8828
Proceeding from the high vacuum to the forevac-
uum region, the turbine stages sequence is:
•
1st stage with a blade angle of 42°,
•
2nd stage with a blade angle of 28°,
•
3rd stage with a blade angle of 24°,
•
4th and 5th stages with a blade angle of 20°,
th
•
6 , 7th and 8th stages with a blade angle of
10°.
The Macrotorr stages are in the form of four discs.
The turbine rotor is supported by permanently lu-
bricated high precision ceramic ball bearings in-
stalled on the forevacuum side of the pump.
The static blades of the stator are made of
stainless steel. These are supported and accu-
rately positioned by spacer rings.
The Macrotorr stators are in the form of self-
positioning machined discs with pumping channels
and an opening restricted by the corresponding
rotor discs. These are made of aluminium alloy.
During normal operation, the motor is fed with a
voltage of 54 Vac three-phase at 933 Hz. To re-
duce losses during start-up to a minimum, the fre-
quency increases according to a ramp with a
higher initial voltage/frequency ratio.
Model 969-8919
Model 969-8825
Model 969-8829
Model 969-8920
Model 969-8826
Model 969-8830
87-900-946-01(B)