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Accurate,
Reliable Samples
Temperature maintenance of your sample line is critical to your
analyzer application. Over 80% of all analyzer problems reside in
the sample conditioning or transport systems. For accuracy, you
must maintain constant temperature, pressure, and flow rate across
the entire length of the sample line without changing the chemical
makeup of the sample to be analyzed.
Let O'Brien help you maintain the
necessary temperatures, flows and pressures with TRACEPAK tubing
bundle engineered to meet the specific needs of your application.
The many heating options and guaranteed heat transfer designs
available with TRACEPAK ensure sample integrity.
With O'Brien you will maintain
consistent temperature of your process line for your Gas or Liquid
sampling systems.
Gas Sampling
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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Let
us put our expertise with analyzer sample lines work for you:
stack
gas analyzers
trace
hydrocarbon
dissolved
oxygen
gas
chromatography
oxygen
moisture
pH
hydrazine
phosphate
cation
conductivity
specific
conductivity
silica
dissolved
hydrogen
oxygen
SOX
NOX
HCl
infrared
hydrogen
conductivity
water
analyzers |
Application Sheets:
Liquid Sampling
Most liquids can be handled at much lower temperatures than gas
samples. In many cases, only water freeze protection is needed.
Note:
Some liquids are analyzed with a gas analyzing technology. In
these cases the sample transport tubing bundle must provide
sufficient heat-up capabilities to vaporize the sample prior to
entering the analyzer. In many cases a separate vaporizer
conditions the sample prior to entering the bundle, which requires
the same considerations as gas sampling.
Application Sheets:
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Specific
applications by type of analyzer:
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Gas
Chromatography
Keeping the
sample at the same temperature and condition as it exists in the
process stream ensures analyzer accuracy. |
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| Liquid or water
contamination of the sample will cause a major dysfunction, so the
sample needs to be maintained above its dew point at all times - a
perfect application for TRACEPAK.
Gas Chromatography typically use a
single small diameter tube, 6mm or 1/4" seamless stainless
steel or Teflon, with an electric tracer capable of maintaining 60ºC/140ºF
at various ambient conditions, such as O'Brien's TRACEPAK.
It is also common to have a
multiple tube bundle for gas chromatography. An additional tube is
often used to return the unused sample back to the process. Return
lines for gas chromatography usually only require freeze
protection.
Application Sheets:
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Total Hydrocarbon
Analyzers
More
challenging than most sample transport systems, THA have high
exposure temperatures and high maintenance temperatures (above 120ºC/250ºF). |
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To avoid failed sample
lines, a thorough design with proper tubing such as PFA Teflon and
a temperature controller is needed.
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Continuous Emissions
Monitoring
Tubing bundles
for the CEM market incorporate a wide variety of configurations
typically for dry or wet extractive systems.
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In dry extractive
systems, after the sample is extracted from the flue and
conditioned to remove particulates and moisture, the gaseous
sample is transported in a heat traced line to an environmental
enclosure where the analyzer is located. The heat traced line is
commonly a tubing bundle (we recommend TRACEPAK) containing
separate lines for the sample and calibration gas. An unheated
blowback line is often included as well.
In wet extractive systems, commonly used by process industries,
the sample needs to be maintained above the vaporization
temperature when transported to the analyzer. This prevents acids
from condensing out of the sample. TRACEPAK used for these
applications generally require high temperature heaters and a
temperature controller.
Application Sheets:
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Advantages of extractive
systems:
- Analysis of multiple streams by
a single analyzer.
- Analyzer installation in a
location that is not hazardous to humans or equipment.
- Systems are easy to upgrade by
adding additional streams for measured components.
- Installation is easier and less
costly than fiber optic cable.
Whatever your sample transport and
conditioning needs, let O'Brien's sample line tubing bundle
experts help you when you're specifying tubing bundles for
analyzers. We'll help you achieve the most accurate analysis, with
a consistent and predictable temperature from one end of the
sample line to the other, so your samples are always reliable.
maintaining an accurate sample line temperature, and maintaining
sample integrity. We'll help you achieve the most accurate
process, with a consistent temperature from one end of the sample
line to the other, so your samples are always predictable and
reliable.
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Request
performance and pricing information for a bundle.
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