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DESCRIPTION OF THE TV 301SF NAVIGATOR
The TV 301SF Navigator pumping system consists
of a pump with a dedicated controller fixed to it.
The system is available in two models that differ in
the position of the controller.
The TV 301SF Navigator pump model is:
− Model 969-8917 with ISO 100 high vacuum
flange.
The TV 301SF Navigator kit two models are:
− Model 969-8822 with ISO 100 high vacuum
flange and 24 Vdc controller;
− Model 969-8823 with ISO 100 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 figure shows the two kit models.
Models 969-8822 and 969-8823
Pump Description
The pump consists of a high frequency motor driv-
ing a turbine fitted with 9 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.
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°,
•
6th, 7th, 8th and 9th stages with a blade angle
of 10°.
The Macrotorr stages are in the form of 3 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 963 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.
The pump can be water cooled or air cooled: in the
first case the customer can use the dedicated
channels on the pump body, in the second case
an external optional fan is available.
A thermistor sensor is mounted near the upper
bearing to prevent the pump from overheating.
The pump is balanced after assembly with a resid-
ual vibration amplitude less than 0.01 µm.
The pump can operate in any position and can be
supported on the high vacuum flange. The con-
nection of the forevacuum on the side of the pump
is a KF 16 NW flange.
69/89
TECHNICAL INFORMATION
87-900-957-01(F)
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