Pfeiffer HiPace 300 Operating Instructions Manual page 20

Installation
Sealing gas connec-
tion
20
 Default for the casing heating is "accessory B2".
 Establish the mains supply for the relay box according to the accessory operat-
ing instructions.
The turbopump must be operated with sealing gas to protect it, such as in the case
of unclean processes or high gas throughput. The supply is made via a sealing gas
valve or alternatively via a sealing gas throttle without control. The activation of
the control valve for the sealing gas connection is not pre-installed in the electronic
drive unit and has to be configured via their interfaces.
The permissible connection pressure is max. 1.5 bar absolute.
• When operating the pump with more than 50 % of the maximum gas through-
put, sealing gas must be used to ensure rotor cooling.
• The sealing gas flow rate amounts 12-15 sccm for the HiPace 300.
Sealing gas supply without control valve
SG
Fig. 10: Connecting the sealing gas throttle
18 Seal ring 16
 Unscrew the locking screw with seal ring out of the sealing gas connection.
 Screw the sealing gas throttle with sealing ring into the sealing gas connection.
Sealing gas supply with control valve
Fig. 11: Connecting the sealing gas valve
18 Seal ring 16
 Unscrew the locking screw with seal ring out of the sealing gas connection.
 Screw the sealing gas valve with seal ring into the sealing gas connection.
 Insert the control cable of the accessory into a free accessory connector on the
TC 400 and tighten.
 Make the settings and control via the interfaces of the electronic drive unit.
18
16
16b
3a
Locking screw 16b Sealing gas throttle
18
SG
3a
Locking screw 16a Sealing gas valve
16
16a