Varian 969-9069 Serie Mode D'emploi page 36

GAS PURGE VALVE INSTALLATION
A gas purge valve is available to protect the pump
bearings against particulate and corrosive gases
that could move into the pump.
To install the gas purge valve it is necessary to un-
screw the purge port cover as shown in the follow-
ing figure,
and then screw the gas purge valve (with a torque
of 2.5 Nm) as shown in the following figure.
VENT VALVE INSTALLATION
The vent valve mod. 969-9833 enables undesired
venting of the pump during a temporary power fail-
ure (5 sec maximum) to be avoided, and enables
an automatic vent operation.
Unscrew the threaded plug.
Screw the vent valve into the pump.
Tighten the valve using a 16 mm hexagonal span-
ner.
! ! ! !
Do not overtighten the valve as this may damage
the thread on the pump.
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TECHNICAL INFORMATION
CAUTION
87-900-882-01(B)