Agilent Technologies X3500-64000 Mode D'emploi page 294

17 Technical Information
Connection of the Fore-Vacuum Pump
Connection of the Fore-Vacuum Pump
A flange KF 16 NW is available to connect the TwisTorr 304 FS pump
to the forevacuum pump. A hose or vacuum approved pipe can be
used. If a rigid pipe is used, any vibration generated by the
mechanical pump must be eliminated through the use of bellows.
The TwisTorr 304 pump is characterized by its high compression ratio also for oil
NOTE
vapors. When using a mechanical oil-sealed pump, it is advisable to install a
suitable trap between the turbopump and the fore-vacuum pump in order to
prevent oil back-streaming.
294/304 TwisTorr 304 FS User Manual / 87-901-027-01(B)