Agilent Technologies X3500-64000 User Manual page 283

Do not overtighten the valve as this may damage the thread on the pump.
CAUTION!
Then connect the cable from the valve to the suitable connector on
the controller.
TwisTorr 304 AG Rack Controller Compatible Vent
Valve mod. 969-9844
Figure 47
For further details refers to the Rack Controller manual.
To install the vent valve unscrew and remove the threaded plug (see
figure below).
TwisTorr 304 FS User Manual / 87-901-027-01
Technical Information
Vent Accessories
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