先过滤

AF primary filter sponge, a filter sponse with alternate blue and white, is mainly applicable to collecting the larger dust molecules in the air to prevent the medium filter from being filled and blocked with larger dusts so early and to keep longer service life and better filtration effect. It is made of super hard fiber and is sprayed with a kind of adhensive evenly for strengthening, and so it has a better primary filtration. Weight: 200gr/sqm Thickness: 15mm Air Velocity: 0.55m/sec Air Flow Rate:1980m3/h Initial Resistence:15Pa Final Resistance:200Pa Medium Arrestance:77.40% Dust Holding: 285gr/sqm Max Temperature: 110 oC Filtration Efficiency: G3 DIN 24185 Flame Resistance: F1 DIN 53438