Documents are only to be used and distributed completely and unchanged, especially including the section ”Safety information”. This is page 16 of a document consisting of
49 pages. The instructions for use describe only the actual product. If the product is older or newer than the date of writing, it is strictly the users´ responsibility to check carefully
the validity of the document (if in doubt, order appropriate instructions for use). 99 90 34 / 12/09/2003
For
condensable vapours
(water vapour, solvents, ...):
☞
Do not pump vapour before pump has reached its operat-
ing temperature and with gas ballast valve closed.
☞
Open gas ballast valve. Close gas ballast valve by turning
180°.
☞
The gas ballast valve is open if the flash on the gas ballast
cap shows away from the pump (MZ 2C VARIO / MD 4C
VARIO / PC 2002 VARIO), respectively downwards (PC 2003
VARIO / PC 2004 VARIO).
☞
With gas ballast valve open ultimate vacuum will be reduced,
pumping speed is decreased.
☞
Use inert gas at the air inlet to avoid the formation of explo-
sive mixtures.
In case of low boiling solvents when the formation of conden-
sate is unlikely, the use of gas ballast might be unnecessary.
☞
Operating the pump without gas ballast increases the sol-
vent recovery rates at the exhaust waste vapour condenser.
gas
ballast
Separation of condensate:
Both round bottom flasks are coated with a protective layer to
prevent disintegration in case of breakage or implosion.
☞
Collecting flask at the outlet: Remove joint clip, remove flask
and drain condensate.
☞
Separator at the inlet: Isolate or shut down the pump, admit
air or inert gas to atmospheric pressure. Remove joint clip,
remove flask and drain condensate.
Important:
Obey applicable regulations when disposing sol-
vents. Reuse if possible, purify if contaminated.
Check overpressure safety relief device at the exhaust waste
vapour condenser regularly, replace if necessary.
☞
Check especially for conglutination and cracks.
During operation PC 2002 VARIO / PC 2003 VARIO / PC 2004 VARIO:
overpressure
safety relief
device
catchpot at
the outlet
catchpot at
the inlet
Attention: Important notes regarding the use of gas ballast
☞
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.
☞
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.
