➨
Air and pumped media might react inside the pump or
at the outlet of the pump and form hazardous or explo-
sive mixtures, when you use air rather than inert gas
for the gas ballast. This constitutes a risk of significant
damage to equipment and/or facilities, a risk of person-
al injury or even loss of life.
+
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.):
-
RC 6:
The gas ballast valve is open if the ar-
row on the gas ballast cap is pointing towards
the labelling ”GB” (towards the pump’s inlet).
MD 12C / MV 10C:
The gas ballast valve is
open if the arrow on the gas ballast cap is
pointing away from the pump’s inlet.
- 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 pressure of inert gas: 17.5
psi (1.2 bar) absolute.
- Close the gas ballast valve by turning the
cap 180°.
Do not pump vapors before the pump has reached its op-
erating temperature. Install an in-line valve in the inlet line
and open it only approx. 30 minutes after the pump has
been started.
In case of low boiling solvents (when the formation of
condensate is unlikely), the use of gas ballast might be
NOTICE
NOTICE
Summary of Contents for PC 8 / MD 12C
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