M&C TechGroup ECP20-2 Operator's manual - Manual (Page 7)

7
Gas sampling and gas conditioning technology 3-1.10-ME
6 APPLICATION
The Peltier Gas Sample Cooler Type ECP20 is used in analyser sample system design to reduce the
dew point of wet gases to a level that is stable and low.
Sample gas cooling prevents subsequent condensation in the analyser. The stability of the dew point
is also extremely important at it helps to prevent water vapour cross sensitivity and volumetric error,
especially in infrared analysers.
The sample gas passes through a sampling probe to the Type ECP20 Cooler where it is lowered to a
dew point of +5°C. Solids will have been trapped in the filter of the sample probe, (If provided in the
type used) or are trapped in a downstream fine filter.
The conditioned gas can now be passed to the analyser.
If the analyser has no gas flow control or indicator functions, these should be provided externally, just
as with a gas delivery pump for unpressurized gases.
The condensate is discharged externally:

For operations under pressure, an automatic condensate drain or collection vessel is used.

For operations in partial vacuum (suction), a condensate vessel with a manual drain or a peristaltic
pump for automatic condensate removal is used.
For protection against liquid breakthrough and to increase the dependability of the complete system
we recommend the use of a fluid alarm sensor.
N O T E !
For protection against liquid breakthrough and to increase the dependability
of the complete system we recommend the use of a fluid alarm sensor.
The Type ECP 20... Peltier Gas Coolers are designed for use in gas analysis whenever moisture is
likely to effect results.
The following figure shows the flow sheet of an typical application of the electric gas cooler
ECP 20....


 

Sample gas IN
+5°C
ECP-20

  

alternative :
condensate vessel
Test gas IN
1 : Filter sample probe SP ... 4 : 3-way ball valve 7 : Super fine filter FP ... 10 : Analyser
2 : Heating sample line 5 : Peristaltic pump (option) 8 : Aerosol filter CLF-5
3 : ECP-20 cooler 6 : Membrane pump 9 : Flow meter FM10
Figure 1 Application example of the ECP-20