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.
are typical problems encountered when the sample bundle is not properly
- 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