Freshfilter Filters

P1 & P3 Dust Filters
A P1 dust filter is a pre-filter that can capture coarse dust particles to protect the following filters. A P1 filter can prevent the P3 dust filter from leaking or clogging the activated carbonfilter. So the filter has an important function in a complete filter package. This filter has an F5 class and is manufactured and supplied according to the ISO16890 standard.
A P3 filter, is an absolute filter that can capture harmful particulate matter such as asbestos or quats dust. This filter is tested for leak tightness and comes standard with an accompanying filter certificate. All P3 dust filters have an H13 class and are produced and supplied according to the EN1822 standard.

Activated Carbon Filters
During soil remediation, for example, or at a recycling site, harmful gases/fumes may be released. Activated carbon particles in an activated carbon filter exert an attraction to gaseous or liquid particles (molecules). A carbon filter is formulated for a specific type of contamination, EN12931 provides a clear classification for different chemical substances:

A – Activated carbon for capture of aromatic hydrocarbons > 65 C
AX – Activated carbon for capture of aromatic hydrocarbons < 65 C
B – Impregnated carbon for capture of inorganic vapors
E – Impregnated for capture of acids
K – Impregnated for capture of ammonia compounds
HG – Impregnated for capture of organic mercury compounds

A combination of the different types of coal is possible, depending on the nature of contamination.