Introduction 25
03/2016 CFPP Process Analyzer CFPP-4.2
• Explosion-proof chiller for liquids
• MODBUS interface
• Remote maintenance interface
3.2 Significance of the Cold Filter Plugging Point
The cold filter plugging point (CFPP) of a petrochemical product is an important indicator
for the behavior of that product at low temperatures. The analyzer CFPP-4.2 is designed
for monitoring and controlling the production process and the composition of blends such
as diesel fuels and heating oils.
Analysis of the CFPP of petrochemical products in the laboratory is defined by national and
international standards, for example:
• DIN EN 116
• ASTM D 6371
• IP 309
3.3 Measuring Principle
The cold filter plugging point (CFPP) is defined as the temperature at which a certain
amount of sample that is being cooled down in a defined way no longer flows through a
standardized test filter.
In laboratory analysis, the CFPP of a sample is determined according to the standards
listed above. The analyzer operates in accordance with these standards and carries out
measurements automatically.
The sample is fed into a sample container and cooled down to a specific temperature. It is
then pulled through a test filter with defined diameter by means of low pressure and must
pass a liquid sensor within 60 seconds. The sample then flows back into the sample
container and is cooled down by 1 K. The next text cycle begins.
If the sample does not reach the liquid sensor within 60 seconds, or if it does not flow
back into the sample container, this indicates that paraffin particles have formed which
block the test filter. The temperature at the start of the test cycle is the CFPP.
Note: For a detailed description of the analysis process, please refer to the software
manual.
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