User guide

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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. Manual-no.: 999248 / 28/04/2011
gas
ballast
4.5 Attention: Important notes regarding the use of gas ballast
➨ Whenusingairratherthaninertgas,riskofsignicant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.
In case of condensable vapors (water vapor, solvents, ...):
☞ Do not pump vapor until the pump has reached its operat-
ing temperature.
☞ Open gas ballast valve.
☞ The gas ballast valve is open if the arrow on the gas bal-
last cap points downwards.
☞ 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explosivemixtures.
☞ Close gas ballast valve by turning it 180°.
Incaseoflowboilingsolventswhentheformationofcondensateisunlikely,theuse
of gas ballast might be unnecessary.
Operating the pump without gas ballast increases the solvent recovery rate at the
condensate cooler (accessory).
Attention: Notes concerning the operation of the condensate cooler (acces-
sory)
☞ Thegasoutlet(hosenozzle10mm)mustnotbeblocked.Theexhaustpipeline
has always to be free and pressureless to enable an unhindered discharge of
gases.
☞ Connect the exhaust to a suitable treatment plant to prevent the discharge of
dangerous gases and vapors to the surrounding atmosphere.
☞ Ensure that the coolant outlet pipeline is always free and that it cannot get
blocked.
• Checktheoverpressuresafetyreliefdeviceatthecondensatecoolerregularly,
replaceifnecessary.Checkespeciallyforconglutinationandcracks.
• Maximumpermissiblecoolantpressureatthecondensatecooler:6bar(abso-
lute).
• Comply withthe maximumpermissible coolantpressuresofadditionalcompo-
nents in the coolant circuit (e.g coolant valve).
• Installoptionalcoolantvalvesalwaysinthesupplylineofthewastevaporcon-
denser only.
• Avoidoverpressure inthe coolantcircuit(e.g.causedbyblockedorsqueezed
coolant hoses).
• In case of condensation: Check liquid level in the catchpot during operation.
Avoidoverowingofthecatchpot.