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YK18-0012-AI-101-02
3.4.1 Gas purge
To this machine, a gas purge unit can be optionally available and installed.
If gasses are discharged, the pump temperature rises, which may affect the bearing service life.
If Ar gas of 30 mL/min or more is discharged serially, use the unit.
(Note 1)
(Note 1)
For more details, refer to attached instruction manual on turbo-molecular-pump UTM-70B.
Introduce N2 gas for the purge gas type with the volumetric flow of 25mL/min.
Start of gas supply
After the startup of the auxiliary pump but before the process gas discharge.
Stop gas supply
After full discharge of the process gas but before the stop of the auxiliary
pump.
Gas type
Nitrogen of which purity is 4N (99.99%) or more
Interface (main unit side)
Single touch joint of
φ6
mm
Figure 15 Gas purge method
▶
Installation
Vacuum container
Gas purge port
Opening/closing
valve
Auxiliary pump
Flow meter with
control valve
Pressure
reducing
valve
Filter
Gas source