Agilent Technologies TwisTorr 305-IC Mode D'emploi page 248

8 Technical Information
Pump Operations
Installing an inlet screen will reduce the pumping speed by the following amount:
X3500-68000
X3500-68001
The inlet screen is fitted in the upper part of the pump, as shown in the figure.
Figure 27
The screen can be mounted on each pump.
The screen can be removed as shown in the following figure.
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Reduction in pumping speed (%)
Ar N
2
20% 18%
TwisTorr 305-IC User Manual / 87-901-058-01
He H
2
7% 5%