How Filters Trap More Dirt As illustrated below, the finer the fiber in a filter weave, Filter, Type 1 SV-SPF1 Fine Particle Filters the greater the ability to trap dirt and other particles, thus decreasing blow-by. The photomicrographs show that A thinner, more concentrated weave (HEPA media) for the filter has a more effective weave than that of a trapping extremely fine particles. Typical applications: conventional filter bag. This increases the ability to trap color laser printers, color copiers and highly sensitive dirt and virtually eliminates blow-by. equipment. Filter, Type 2 SV-MPF2 High Performance Filters Specially designed for trapping unwanted toner from copiers and laser printers. Also ideal for cleaning keyboards, fans and other household dust collections. Typical Particle Sizes SVSV-SPF1-SPF1 SVSV-MPF2-MPF2 Coal Dust Toner Photomicrograph of the fiber weave of a conventional filter bag (500x) Paint Pigments Pollens Milled Flour Atmospheric Dust Smoke Human Hair 0.1 0.5 1 2 10 20 100 Micrometers Photomicrograph of the fiber weave of a SCS filter (500x)Efcfi iency Date : August 20, 2008 Date : August 20, 2008 Date : August 20, 2008 Filter ID : Type 2 Filter Filter ID : Type 1 Filter Filter ID : Type 1a Filter (HEPA) Test Type : Fractional Efcfi iency Test Type : Fractional Efcfi iency Test Type : Fractional Efcfi iency Test Aerosol : KCl, Neutralized Test Aerosol : KCl, Neutralized Test Aerosol : KCl, Neutralized Flow rate(cfm) 40 cfm (Type 2) Flow rate(cfm) 40 cfm (Type 1) Flow rate(cfm) 40 cfm (Type 1a) Dp H2O) 3.079 Dp H2O) 3.157 Dp H2O) 3.157 Size Range (mm) Fractional Efcfi iency (%) Size Range (mm) Fractional Efcfi iency (%) Size Range (mm) Fractional Efcfi iency (%) 0.3-0.5 99.980 0.3-0.5 99.988 0.3-0.5 47.0 0.5-0.7 64.9 0.5-0.7 99.991 0.5-0.7 99.995 0.7-1.0 76.9 0.7-1.0 99.999 0.7-1.0 100.000 1.0-2.0 100.000 1.0-2.0 100.000 1.0-2.0 90.7 2.0-3.0 100.000 2.0-3.0 100.000 2.0-3.0 96.7 3.0-5.0 100.000 3.0-5.0 100.000 3.0-5.0 99.4 >5.0 100.000 >5.0 100.000 >5.0 100.0 Fractional Efficiency versus Particle Diameter 100 80 60 40 cfm (Type 2) 40 cfm (Type 1) 40 cfm (Type 1a) 40 Fractional Efficiency (%) 20 0 1 10 Particle Diameter ( m) Typical LoadingWeight Gain (gram)Pressure Drop Alumina Fine (mm H2O 0.0 655.7 454.0 358.0 908.0 168.0 1362.0 70.6 1816.0 5.1 1828.3 2.2 Fractional Efficiency (%)