Agilent Technologies TwisTorr 404 FS User Manual page 304

17 Technical Information
Vent Accessories
TMP Rack Controller Compatible Vent Valve mod.
X3501-68002
Figure 32
This vent valve has a fixed delay time of about 2 sec.
To install the vent valve execute the same steps as the vent valve
model 9699834 (see the above paragraph).
304/328 TwisTorr 404 FS User Manual / 87-901-048-01