Gas and Process Sample Transport Systems for Analyzer Applications

Some form of external heating must be provided to the sample line to maintain the sample integrity and prevent components in the sample from condensing out as the temperature drops below their respective dew points. To avoid the following problems, let O'Brien's experts help you with a completely thermally engineered TRACEPAK system designed for gas analyzer applications.

Below are typical problems encountered when the sample bundle is not properly designed:

  • As components within the sample condense the volume of the sample is lowered causing errors in the measurement of component concentrations. In some cases the component to be measured may condense out completely or be completely absorbed by the condensed phase of another component. If the vapor is acidic, as water condenses out the vapor may become wet and corrosive, causing damage to the sample line.
  • Hydrocarbon vapors containing free water can form hydrates and cause rapid clogging of the sample line if the temperature gets too low.
  • Overheating of sample lines can also cause problems such as pyrolysis, polymerization of the sample line, or line coking.
  • The maximum surface temperature of the process tube must often be limited because of the area of classification.

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