13
3.10. Pumping Of Vapors
If condensable vapors are to be pumped, the pump needs to
be operated with the gas ballast on the exhaust side 8.2.
This effects an increase in the gas temperature and a dilution
in the concentration of the process gases.
Controlling the gas ballast inlet 8.2 via magnetic valve:
When the magnetic valve is connected to the
TCP 2000 it opens when a pump rotation speed
exceeds 9000 rpm.
In cases of malfunctions the valve closes auto-
matically
Connecting the gas ballast 8.2 :
➡
Unscrew the plug G 1/8" from the pump housing and repla-
ce it by a screw-in small flange.
– If required install a orifice.
– Alternatively use a magnetic valve TVF 005.
➡
Connect the inert gas line to the gas ballast connection 8.2.
– Generally use dry air or pure nitrogen.
➡
Set up the gas ballast throughput to a max. of 20 Nl/min at
the inert gas inlet.
☞
PLEASE NOTE
3.11. Pumping Of Light Or Heavy Gases
When pumping light or heavy gases it is recommended to
operate the pump at the intake side 8.1 with gas ballast:
– In the case of heavy process gases the gas ballast effects
cooling and a dilution in concentration.
- In the case of lighter gases the gas ballast operates as a
carrier gas which promotes pumping of the process
medium.
If gases other than air or nitrogen are used for
the gas ballast, please discuss such plans with
Pfeiffer Vacuum first.
The gas ballast reduces the volume flow rate
and increase the final pressure correspondingly
to the admitted quantity of gas ballast.
Controlling the gas ballast inlet 8.1 via magnetic valve:
☞
PLEASE NOTE
CAUTION
TVF 005
V
0.28 N l/min
0.2 mm
P0
P1
8.3
8.2
8.1
23.6 N l/min
Connecting gas ballast
8.1 Gas ballast connection (inlet side)
8.2 Gas ballast connection (exhaust side)
8.3 Sealing gas connection
V
Precision pressure control valve
TVF Magnetic valve (in the operating condition open)
P0 Supply pressure = 3,25 ... 3,5 bar abs.
P1 = 1023 ... 1184 mbar
SG
When the magnetic valve is connected to the
TCP 2000 it opens when a pump rotation speed
exceeds 9000 rpm.
In cases of malfunctions the valve closes auto-
matically
Connecting the gas ballast 8.1 :
➡
Unscrew the plug G 1/8" from the pump housing and repla-
ce it by a screw-in small flange.
– If required install a orifice (0,2 mm) and use a magnetic
valve TVF 005.
➡
Connect the inert gas line to the gas ballast connection 8.1.
– Generally use dry air or pure nitrogen.
➡
Connect the inert gas line to the sealing gas connection
8.3.
☞
PLEASE NOTE
Summary of Contents for OnTool Booster 150
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