C30VR Compressor Installation, Operation, Maintenance and Troubleshooting
7-8
ULVAC CRYOGENICS INCORPORATED
NOTE:
If you need a pressure regulator and/or helium charging hose described in Table
6-2 for adding helium gas, please contact our Service Engineering Division or the nearest
customer support center.
Figure 7-9
Items for adding helium gas to the compressor
1/4 inch female flared
end (connect this side
to the compressor)
Pressure regulator handle
Bottle valve
Pressure regulator
Helium bottle
Helium
charging hose
The purity of helium gas to be charged must be above 99.999%. If the purity is lower, it
may result in deterioration of the cryopump system or performance degradation.
CAUTION
If the helium pressure of the cryopump system becomes 0, there is a risk that air or
moisture in the air invade into the system and contaminate helium. In such a case,
CAUTION
please contact our Service Engineering Division or the nearest customer support center.
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