Agilent Technologies TwisTorr 305 FS Notice De Mode D'emploi page 235

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 28
The screen can be mounted on each pump.
The screen can be removed as shown in the following figure.
TwisTorr 305 FS User Manual / 87-901-057-01 (A.00)
Reduction in pumping speed (%)
Ar N
2
20% 18%
Technical Information
Inlet screen installation
He
7%
235/258
8
H
2
5%