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To reduce condensation in the pump, do not pump vapor
before the pump has reached its operating temperature.
Open the gas ballast valve when pumping condensable
vapors. Turn gas ballast cap to open valve.
For
condensable vapors
(water vapor, sol-
vents, etc.):
- The gas ballast valve is open if the arrow on
the gas ballast cap is pointing towards the
ON/OFF switch.
- With gas ballast valve open, the ultimate
vacuum will be reduced.
- Use inert gas for gas ballast to avoid the formation of
explosive mixtures.
- Close the gas ballast valve by turning the cap 180°.
In case of low boiling solvents (when the formation of con-
densate is unlikely), the use of gas ballast might be un-
necessary.
Shutdown & storage
The pump can be switched off under vacuum.
Short-term:
Has the pump been exposed to condensate?
- Allow the pump to continue to run at atmospheric pres-
sure for a few minutes.
Has the pump been exposed to media which may damage
the pump materials or form
deposits
?
- Check and clean pump heads if necessary.
Long-term:
Take measures as described above regarding short-term
shutdown.
Separate the pump from the application.
Close inlet and outlet ports (e.g., with transport caps).
Close the gas ballast valve.
Store the pump under dry conditions.
NOTICE
NOTICE
gas ballast
(open)
