[Sneap] sf6 drier question

[schmidt at nucmar.physics.fsu.edu]

Hi to all,
  After decades of use drying our sf6, the condition of our molecular sieve
  is in question. Circulating the gas is not getting  us to the low moisture
  levels that we were able to obtain. Can anyone share their experince with
  opening the drier canisters and what they found inside. My concern is about
  sf6 breakdown products and procedures for removing old sieve material. Does
  dust/powder end up in the drier that degrades its performance? Any input
  would be appreciated.
                                           Brian Schmidt
                                           Physics Dept.
                                           Florida State University
  I

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