Aerosol filter

The aerosol filters series AF are used for continuous extractive gas analytics. They are usually installed directly upstream the analyzer and serve for fine liquid particle (aerosol) separation from the sample gas to protect the analyzer from damage. Typical applications for the filter’s series AF are burning processes with high content of sulfur in the burning material like brown coal and heavy oil.

The aerosol filters series AFare designed particularly corrosion resistant and easy to maintain. Filter head and holder are made of PVDF, body is made of glass and sealing is made of FKM. The glass fiber filter element has 2 layers with different porosity and an especially low pressure drop of only a few mbar. Regarding design special attention was also paid to an extra low dead volume for fast response time. Due to the G1/4” f-thread the sample gas connections can be determined variably by means of an appropriate screw fitting. Version AF-LS additionally has a liquid stop with semipermeable membrane integrated in the filter outlet.

With the 2-layer glass fiber filter element 99,9999% of fine liquid particles up to a size of 0,1µm are separated reliably. The filtration happens from inside the filter element to the outside via the inner layer with higher porosity than the outer layer. This way the very fine liquid particles can combine to bigger liquid drops on the way through the filter element and will drop down to the bottom due to gravity. The glass body allows quick and easy to assess the condition of the filter element.