VACUUBRAND PC 3001 basic pro - Manual (Page 32)

page 32 of 54
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Make sure that air/gas intake through the gas ballast
valve can never lead to hazardous, explosive or other-
wise dangerous mixtures. If in doubt, use inert gas.
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
pump.
- With gas ballast valve open, the ultimate
vacuum will be reduced.
- Use inert gas for gas ballast to avoid the formation of
explosive mixtures. Attention: maximum supply pres-
sure of inert gas: 17.5 psi (1.2 bar) absolute.
- 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.
NOTICE
gas
ballast
NOTICE