KNF LABOPORT N820.3FT.29.18G, Manual

Page: 80 / 333

Chemically-resistant Laboratory pump N820.18 EX
Design and function
Translation of Original Operating Instruction, English, KNF
317428-317425 09/20
25
7.1 Gas ballast
Fig.5: Operating
button for gas bal-
last
DANGER
Personal injury through poisoning or
explosion and damage to the pump
à
When the gas ballast valve is open,
make sure that no reactive or ex-
plosive mixtures can form.
à
Close the gas ballast valve if nec-
essary.
à
If inert gas is necessary, contact
KNF Service.
If vaporous media are transferred, the formation of con-
densate in the pump heads can be minimized by open-
ing the gas ballast valve.
The final vacuum that can be achieved is worse when
the gas ballast valve is open (see the chapter entitled
6
Technical data ).
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