VACUUBRAND RC 6 - Manual (Page 31)

page 31 of 59
For condensable vapors (water vapor, sol-
vents, etc.):
- Let the pump run with gas ballast to re-
duce condensation of pumped substances
(water vapor, solvents, ....) in the pump or
to decontaminate the pump oil from volatile
substances.
- With gas ballast valve open, the ultimate vacuum will
be reduced.
- Use inert gas for gas ballast to avoid the formation of
explosive mixtures.
- To open and to close the gas ballast valve turn the
gas ballast valve cap. The manual gas ballast valve
is open if the arrow on the gas ballast cap is pointing
towards the inlet of the pump respectively towards the
labelling ”Gasballast”.
- Close the manual gas ballast valve by turning the cap
180°.
Operate the pump without gas ballast only in case of
a clean system or when there are no condensable va-
pors.
Do not pump vapors until the pump has reached its oper-
ating temperature. Install an in-line valve in the inlet line
and open it only approx. 30 minutes after the pump has
been started.
Check the maximum vapor inlet pressure. The pump can
operate continuously at any pressure lower than the maxi-
mum specified inlet pressure for vapor. Avoid sudden va-
por surges when evacuating commences (large inner sur-
faces, large-volume vacuum vessel).
Use a flow-control valve in the inlet line and open the valve
gradually.
gas ballast
(open)
NOTICE