GA 05.147/3.02 - 06/2002
Description
Contents
Page
1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1 Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.2 Standard equipment . . . . . . . . . . . . . . . . . . . . 3
1.3 Ordering data . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.4 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . 6
2 Connections . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.1 Operating environment . . . . . . . . . . . . . . . . . . 9
2.2 Attaching the pump to the vacuum chamber . . 11
2.3 Forevacuum connection . . . . . . . . . . . . . . . . . 12
2.4 Cooling the pump . . . . . . . . . . . . . . . . . . . . . . 14
2.5 Connecting the purge gas and venting valve . 16
2.6 Electrical connection . . . . . . . . . . . . . . . . . . . 18
2.7 Interface description . . . . . . . . . . . . . . . . . . . . 22
3 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
3.1 Switching on . . . . . . . . . . . . . . . . . . . . . . . . . 28
3.2 Shutting down . . . . . . . . . . . . . . . . . . . . . . . . 28
3.3 Venting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
3.4 Bakeout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
3.5 Removing the pump from the system . . . . . . . 30
4 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . 31
4.1 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
4.2 Service by LEYBOLD . . . . . . . . . . . . . . . . . . . 31
5 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . 32
6 Spare parts . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Figures
The references to the diagrams, e.g. (2/10), consist of the figu-
re number and the item number, in that order.
Warning
Identifies working and operating procedures which must be
strictly observed to prevent hazards to persons.
Caution
Indicates working and operating procedures which must be
strictly observed to prevent damage to or destruction of the
appliance.
We reserve the right to alter the design or any data given in
these operating instructions.
The illustrations are not binding.
1 Description
The TURBOVAC TW 700 is a turbomolecular pump with
compound stage. The frequency converter is integrated.
The pump is designed to evacuate vacuum chambers
down to pressure levels in the high vacuum range. It is
suitable for pumping air and/or clean gases. Aforevacu-
um pump is required for its operation.
These pumps are not suitable for
- pumping liquids
- pumping corrosive or reactive gasses
- operation without a forevacuum pump.
If reactive gases in low concentrations must be pumped
please consult Leybold.
During operation the pressure inside the pump is so low
that there is no danger of ignition (at pressures below
about 20 mbar). A hazardous condition will be created if
flammable mixtures enter the hot pump at pressures
above 20 mbar. During operation the pump can reach
temperatures as high as 110°C (230 °F). Ignition sparks
could occur in case of damage to the pump and these
could ignite explosive mixtures.
We would be glad to consult with you as regards the
media which can safely be handled with this unit.
Warning Never expose any parts of the body to the
vacuum.
1.1 Design
The pumps comprise essentially the pump housing, a
multi-stage rotor with the stator group, and the drive.
The rotor consists of a turbomolecular pumping stage
and a compound pumping stage (= Holweck stage). The
Holweck pumping stage increases the permissible fore-
vacuum pressure level markedly when compared with
the classic turbomolecular pump.
The rotor shaft runs in two ceramic ball bearings, lubri-
cated with grease.
2