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3
Maintenance and Service
Filling the Helium Compressor
WA R N I N G
C A U T I O N
46
Allow a few seconds for the helium to flush the air out
11
of the connecting line.
12
Tighten the Swagelok fitting at the CryoBay end until the
leakage stops.
Adjust the regulator to 225 (1.55 mPa).
13
Check for leaks and retighten the fittings if necessary.
14
If you are not familiar with Swagelok and Aeroquip fittings and
how to use them, read the instructions in
Aeroquip Fittings"
on page 116, before continuing. Failure to
correctly assemble the fitting could result in leaks or the
introduction of foreign material into the compressor.
Required: 99.999% Helium gas cylinder with > 500 psi (3.4
mPa) pressure, 400 psi regulator compatible with high purity
helium.
Cryogenic system must be in the Idle state.
1
Close the valve on the helium cylinder.
2
Close the helium regulator valves.
3
Remove the helium line from the CryoBay by
4
disconnecting the Swagelok connector at the CryoBay gas
supply helium port.
Loosen the nut slowly. If the helium line is pressurized, a hissing will
be heard.
Loosely attach the helium line to the Swagelok end of the
5
Aeroquip/Swagelok Fill Port Adapter.
6
Open the valve on the helium cylinder.
7
Open pressure valve on the pressure regulator about
1/2 turn–do not exceed 5 psi.
Fully open the flow valve on the pressure regulator.
8
Gas should be leaking out around the Swagelok
9
connector at the Fill Port Adapter end of the fill line.
•
If gas is not flowing — open the valves on the
regulator until gas does flow.
"Swagelok and
Cryogenic Systems Operation
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