VACUUBRAND RZ 9 - Manual (Page 30)

page 30 of 49
and the full vapor pumping rate are attained.
Important notes regarding the use of gas bal-
last
Gas ballast is a continuous purge to keep the pump’s in-
terior as clean as possible and to reduce the possibility of
condensation inside the pump.
➨
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 per-
sonal 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.
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
NOTICE
gas ballast
(open)