CI Maintenance 5
Troubleshooting and Maintenance Manual 125
To Replace the Methane/Isobutane Gas Purifier
Materials needed
• Methane/Isobutane gas purifier (G1999-80410)
• Front ferrule for 1/8-inch tubing (5180-4110)
• Rear ferrule for 1/8-inch tubing (5180-4116)
• Tubing cutter (8710-1709)
The methane/isobutane gas purifier needs to be replaced after four tanks of
reagent gas. This frequency may vary depending on purity of the gas and care
taken in uncapping and installing the gas purifier. A large leak upstream from
the gas purifier can quickly exhaust the reduced metal of the oxygen and
moisture traps.
Procedure
1 To install the methane/isobutane gas purifier, follow the instructions on
the label for installation and replacement intervals.
2 Disconnect the fittings on the old filter.
3 Remove the ferrules from the tubing at the outlet of the gas purifier. Using
the tubing cutter, cut off the end of the tubing with the ferrules.
4 Install the new filter.
5 Purge the new filter.
6 Cap the old filter and prepare it to be sent for regeneration. See the
instructions on the label.
Do not remove the caps until you are ready to install the gas purifier. Only remove the
caps in the gas flow to prevent contamination by air.
Methane is flammable. Extinguish all flames in the area before turning on gas flow.
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