Main Compressor's  Water Filter Element Replaced
     --------------------------------------------------


                                     Original Rev.  13-June-2022
                                      Current Rev.  13-June-2022


On 13-June-2022 the water filter for the Main Compressor was
replaced.  At the time of this filter's replacement there was
no recovered gas available for the Liquefier to process.  The
Liquefier had just finished cooling down the storage dewar to
about  0.54 psi.  The replacement went smoothly and the water
flow was back on before the storage dewar pressure was above
1.60 psi - so there was zero down time for the Liquefier
system.   Because a cooling cycle had just finished and the
filter replacement could be finished before the Main Compressor
would be called upon to run again - the Main Compressor was not
turned Off for this filter replacement.


                                                                          Main Compressor
                               Supply Pump       Return Pump               Heat Exchanger
                             --------------    --------------              Differential
                             Input   Output    Input   Output     LPM        Pressure
  With the OLD Filter        -----   ------    -----   ------    ----     ---------------

   13 June 9:45                63      77        59      72      11.2          18  psi
   Normal Operation

   Both Pumps Off              74      75        71      70        ?            4


  With the NEW Filter

   Only Rtn Open  Pumps OFF    70      70        70      70       ---          --

   Only Sup Open  Pumps OFF    77      78        78      78       ---          --

   Both Valves Open Pumps OFF  77      77        71      70       6.8           6

   Both Valves Open Pumps ON   72      86        61      73      13.3          25
   Normal Operation



There was no noticeable change in the readings of the pressure
gauges on the Purifier when the Main Compressor's Filter was
changed.

The previous change of the Main Compressor's water filter was
on  12-May-2022  just one month ago.    The following is a
sketch of the Main Compressor's history since then.


                                                           Main Compressor
                Supply Pump       Return Pump               Heat Exchanger
              --------------    --------------              Differential
    Date      Input   Output    Input   Output     LPM        Pressure
  -------     -----   ------    -----   ------    ----     ---------------

  15-May-22     75      89        63      75      13.7          26  psi
  25-May-22     74      88        63      75      13.5          25
  31-May-22     66      80        56      68      13.5          24
   5-Jun-22     71      84        60      73      13.0          24
   7-Jun-22     70      84        60      73      12.7          24
   9-Jun-22     68      82        60      73      12.5          22
  10-Jun-22     68      82        60      73      12.3          22
  11-Jun-22     66      80        60      72      11.8          20
  13-Jun-22     63      77        59      72      11.2          18


This table is a sample of the daily readings taken while the Main
Compressor is running and when possible while the Purifier is in
Mode 41  normal  "Steady State Production".