Guaranteed filter performance as needed.
Activated carbon is the most effective means against foul odors, dangerous fumes and toxic gases in the atmosphere.
Such carbon filters are usually made from coconut shells or hard coal. Activated carbon is characterized by a large surface able to bind pollutants. Our filters usually offer a surface of more than 1,000 m2 per gram.
Using specific production technologies, the pore diameter and surface of activated carbon can be tailored exactly to the application. Hard coal is considered A class quality which only matches specific pollutants. AX coal has a much smaller pore diameter and is therefore ideal for substances which evaporate at temperatures below 65° Celsius.
In order to achieve a filter effect with a wide bandwidth that is effective for many types of pollutants the raw coal can be treated (impregnated) chemically.
The holding capacity of an activated carbon filter does not only depend on its mass, but also on factors such as impregnation, granularity, pore size and surface. Another vital factor is the air volume flowing through the filter.
The more air is pressed through the filter the earlier it will be saturated. The resulting breakthrough effect will eventually allow pollutants to pass through the filter and reach the clean room.
Only if the fan is positioned in front of the activated carbon filter, existing airborne pollutants will penetrate sufficiently deep into its pores. For this reason SEKA exclusively offers protective ventilation systems with fans mounted on the outside of the filter.
In contrast to this push principle systems based on the pull principle are only able to use a fraction of the activated carbon. This means their filter effect is considerably lower than that of pushing systems. In addition, they also cause a considerable pressure drop inside the filter. As a result, the activated carbon will be saturated faster with water vapor, which greatly reduces its ability to absorb pollutants.
We only offer ABEK filters for atmospheres characterized by a high content of both sulphur-containing gases and ammonia. However, this situation is very rare and only refers to very few applications. In the case of a high level of hazardous sulphur-containing gases, we recommend the use of pure E coal filters.
Our activated carbon filters come in cartridges. This allows the effective combination of filters with different carbon qualities, such as separated E and K filters.