Purging The Pump Through The Integrated Purge/Vent Device Accessory - Purge/Vent Device Installation - Agilent Technologies Turbo-V 850 TwisTorr Bedienungshandbuch

17 Technical Information
Pump used with Corrosive Gases – Pump Purging
Purging the Pump through the Integrated
Purge/Vent Device Accessory – Purge/Vent
Device Installation
An integrated purging and venting device (969-6502) is available as
an accessory to both purge and vent the TV750/850 TwisTorr
Pumping System.
As shown in the following figure, the purge/vent device is made up of
an aluminium block with two solenoid valves fixed on it. All
mechanical and electrical connections are made in such a way to
guarantee the IP54 protection class. The two sole-noid valves are
Normally Closed (in case of power fail both the vent and the purge
lines are shut off). When the pump is powered on, their default set-
tings from the factory are as follow:
The valves operating mode can be set only by se-rial line with WIN
125, WIN 122 and WIN 145.
Figure 80
390/406
Vent valve: Closed
Purge valve: Open
Turbo-V 750/850 TwisTorr User Manual / 87-901-020-01 (A)