AROTECH Filtermanufaktur

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Calssification of Depth
Filters of Air Filtration

General classification
of air filters

Filter classes according
to the individual
standards

Filter classes according to the individual standards

Former filter class acc. to DIN 24185 of Oct. 1980	Actual filter class acc. to DIN EN 7795 of Sept. 1994	Average arrestance against synthetic dust A(m) in %	Average efficiency class againstNat. aerosol/DEHS E(m) in %	Future filter class acc. to pr EN 779
EU 1	G 1	A(m) < 65		G 1
EU 2	G 2	65 < A(m) < 80	-	G 2
EU 3	G 3	80 < A(m) < 90		G 3
EU 4	G 4	90 < A(m)		G 4
EU 5	F 5		40 < E(m) < 60	F 5
EU 6	F 6		60 < E(m) < 80	F 6
EU 7	F 7		80 < E(m) < 90	F 7
EU 8	F 8		90 < E(m) < 95	F 8
EU 9	F 9		E(m) > 95	F 9

Peculiarities:
DIN 24185	Final pressure drop freely selectable, min. initial efficiency (dust spot efficiency) for dust filters > 20 %

DIN EN 779	Final pressure drop for classification for coarse dust filters 250 Pa, for fine dust filters 450 PA, min. initial effency (dust spot efficiency) for fine dust filters > 20 %

prEN 779 Rev.4	Final presssure dropp for classification like EN 779, min. initial dust spot efficiency throught light extension fractional efficiency through light extension fractial efficiency using DEHS-aerosol – for classification with reference to 0.4 µm particles

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