7 | Commissioning
26 | 44
Instruction Manual COBRA NX 0950 A WCV_EN_en
7.1
Conveying Condensable Vapors
Observe the following when conveying condensable vapors, e.g. water vapors:
START
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Close the isolation valve*
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Start the machine
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Warm up the machine (WARM-UP MODE)
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Wait 30 minutes
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Open the isolation valve* and perform the process
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Close the isolation valve*
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Dry the machine (SHUT-DOWN MODE)
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Wait 30 minutes
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Stop the machine
END
* not included in the scope of delivery
Limit flow rate with cold cooling water (<20°C):
– 8 ... 12 l/min
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Ensure that the barrier gas system (dry compressed air) is connected. Check the volume flow on
the barrier gas flow meter (BGF), see Barrier Gas System Connection (Optional) [
16].
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Make sure that the air gas ballast (GB) is mounted and open. If the gas ballast filter is dirty, it
must be cleaned periodically (unscrew and wash out).
●
Make sure that no liquid can enter the machine via the silencer on the pressure side. Install pipes
connected on the outlet side with a gradient away from the vacuum pump. In the case of rising
exhaust pipes, provide a condensate trap (e.g. "dead leg") with drain.
●
Water vapor within the gas flow is tolerated within certain limits. The conveyance of other vapors
shall be agreed upon with Busch.
