Connection of the Fore Vacuum Pump
A barb fitting of 1/2 inches outer diameter is available to connect the
TV 401/301 NSF pump to the fore-vacuum 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 TV 401/301 NSF pump is characterized by its high compression ratio also
NOTE
for oil 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 backstreaming.
TV 401/301 NSF User Manual / 87-900-963-01
16BTechnical Information
154BConnection of the Fore Vacuum Pump
(E)
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