VACUUBRAND MZ 8C - Manual (Page 32)

page 32 of 52
- 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 pres-
sure of inert gas: 17.5 psi (1.2 bar) absolute.
- Close the gas ballast valve by turning the cap 180°.
In case of low boiling solvents (when the formation of con-
densate is unlikely), the use of gas ballast might be unnec-
essary. Operating the pump without gas ballast increases
the solvent recovery rate at the exhaust waste vapor con-
denser (see „Accessories“, pg. 33).
Shutdown & storage
The pump can be switched off under vacuum.
Short-term:
Has the pump been exposed to condensate?
Allow the pump to continue to run at atmospheric pres-
sure 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 above regarding short-term
shutdown.
Separate the pump from the application.
Close the gas ballast valve.
Close inlet and outlet ports (e.g., with transport caps).
Store the pump under dry conditions.
NOTICE