Chapter 2: Prerequisites
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Location and Exhaust Requirements
The CentriVap Concentrator should be located on a surface that is stable, flat and
level.
WARNING: If hazardous or flammable solvents are used, it is recommended
that a benchtop CentriVap Concentrator is used and that it is located inside
a fume hood. Heating of materials could lead to the liberation of hazardous
gases. In all cases, regardless of the solvent used, it is strongly recommended
that the vacuum pump is vented in a fume hood. An accessory secondary
trap is available to minimize the exhausting of solvents into the atmosphere.
This does not, however, negate the need to exhaust the vacuum pump into a
fume hood. Failure to properly vent the CentriVap will expose personnel to
potentially harmful chemicals.
The CentriVap has not been evaluated by an approval agency for the use of
biological, radio toxins or flammable liquids or materials.
Vacuum Pump Requirements
A vacuum pump must be provided by the user. A vacuum pump with a free air
flow rate of 90 liters per minute and 1.3 x 10
-4
mbar blank off pressure is adequate
for aqueous samples. More volatile samples can be satisfactorily processed using
a diaphragm pump with a free airflow of 42 liters per minute and 200 mbar
vacuum. The inlet fitting on the vacuum pump must be suitable for 0.50 ID hose.
Vacuum pumps used with 115V models should be equipped with a 115V, 15 Amp
NEMA 5-15P plug. Vacuum pumps used with 230V models should be equipped
with a “reverse” IEC 320 plug. This will allow the vacuum pump to be plugged
into the receptacle on the back of the CentriVap.
IMPORTANT: To ensure that aggressive samples used in the CentriVap do
not damage the vacuum pump, it is recommended that all internal wetted
parts are PTFE or PTFE coated. When selecting the vacuum pump it is very
important to consider the flammability of the solvent that will be used. If the
solvents are flammable, an explosion proof vacuum pump or one suitable for
the solvents to be processed is recommended.
