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QUICK REFERENCE GUIDE
AGILENT TWISTORR 304FS
4. Purge and Vent Valve
PURGE VALVE
There are several models of purge valve available with different inlet flanges and orifices (10 or 20 SCCM) to
protect the bearings from particulates, corrosive gases or O
Inert gas, such as Nitrogen or Argon must flow into the pump body around the upper bearing towards the fore
vacuum line.
To supply the inert purge gas (e. g. nitrogen) to the pump through the purge port, connect a gas purge valve
between the pressure regulator and the pump. Inlet flow rate should be 0.5 to 0.8 mbar l/s.
Unplug the purge screw and tight up the purge valve.
VENT VALVE
Vent valve is used to automatically vent the pump/vacuum system.
Connect the vent valve to the proper connector according to the controller model, J1 (Navigator) or J7 (Rack) and
follow the below instruction to vent the the pump throught the valve.
304 ON BOARD NAVIGATOR CONTROLLER
How to vent the pump
Vent valve is Normally Open (N.O.)
● Available in 0.5 and 1.2 mm orifice.
● Through Tplus (RS232)
● No setting available
● If the vent valve is connected to the controller
automatically at the stop button the vent valve will
open.
that might be pumped.
2
304 AG RACK CONTROLLER
How to vent the pump (AG Rack Controller)
Vent valve is Normally Open (N.O.)
● Available in 0.5 and 1.2 mm orifice.
● By using the Vent Valve (N.O)
● Opening delay and open valve time are both
selectable through front panel/via RS232
● Click on Stop button then the controller will
perform the procedure according to the settings.
5
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