Documents are only to be used and distributed completely and unchanged. It is strictly the users’ responsibility to check carefully
the validity of this document with respect to his product.
page 13 of 24
No. 47800-2-02-5
In case of low boiling solvents (when the formation of condensate is unlikely), the
use of gas ballast might be unnecessary.
For
condensable vapours
(water vapour, solvents, ...):
☞
Do not pump vapour before pump has reached its operat-
ing temperature. Open gas ballast valve when pumping
condensable vapours.
☞
The gas ballast valve is open, if the gas ballast nozzle is
visible in the opening of the gas ballast cap.
☞
With gas ballast valve open, the ultimate vacuum will be
reduced.
☞
Use inert gas for gas ballast to avoid the formation of ex-
plosive mixtures.
☞
Close the gas ballast valve by turning the cap 180°.
gas
ballast
Shutdown
Short-term:
Has the pump been exposed to condensate?
Allow the pump to continue to run at atmospheric pressure 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 in section short-term shutdown.
Separate pump from the apparatus.
Close inlet and outlet port (e. g. with transport caps).
Close the gas ballast valve.
Store the pump in dry conditions.
NOTICE
Attention: Important notes regarding the use of gas ballast
➨
When using air rather than inert gas, risk of significant damage to equipment and/
or facilities, risk of personal injury or even loss of life exists due to the formation
of hazardous and/or explosive mixtures if air and pumped media react inside or
at the outlet of the pump.
☞
Make sure that air/gas inlet through the gas ballast valve never leads to hazard-
ous, explosive or otherwise dangerous mixtures. If in doubt, use inert gas.
