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Connecting the Forepump for the Vacuum System
Connecting the Forepumps to the Lab Exhaust System
Thermo Scientific
Orbitrap Tribrid Series Getting Connected Guide
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Connecting the Forepumps to the Lab Exhaust System
Most atmospheric pressure ionization (API) applications contribute to solvents accumulating
in the forepump. Choose an exhaust system that can accommodate the periodic purging of
these solvents. The frequency of the purging depends on the throughput of the system—never
operate the pump continuously with the gas ballast valve open.
To connect the forepumps to the exhaust system
CAUTION
• Run the exhaust hose at floor level for at least 2 m (79 in.). This hose acts as a trap for
exhaust fumes that would otherwise recondense in the forepump oil.
• Maintain the exhaust pressure from atmospheric pressure minus 15 mbar to
1.15 bar absolute (0.15 bar relative).
• Although Thermo Fisher Scientific recommends that you periodically open the gas
ballast valve for at least 30 minutes (on the side of the pump) to purge the
accumulated solvents, opening the valve might allow a large volume of volatile solvent
waste to enter the fume exhaust system.
• The forepump exhaust is a health hazard. The dedicated exhaust system must be
actively vented and be able to accommodate the periodic purging of the accumulated
solvents in the forepump.
Connect one end of the exhaust tubing to the forepump exhaust
ports. Then, secure the other end to the lab exhaust system.
If you removed the workbench’s front
panel (as shown), reattach it.
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(Orbitrap Fusion Lumos MS)