Classification of filters and relevant testing methods

Charter no 2
Characteristic
figures
The avarage level of separation Am (%) The avarege level of the efficiency Em (%) The integral factor of initial penetration Di (%) Local factor of initial penetration DL (%)
The test processesThe principal of the measurement EN 779 - 2002
Weighing
EN 779 - 2002
Colouring
EN 1822
Sticking of the particles by CNC or LPC
EN 1822
Scanning with calculation of particles / visualy
Test aerosol The air with the synthetic test dust The air with the atmospher air The clean +MPPS-DEHS-aerosol The clean air +MPPS-DEHS-/Paraf.-aerosol
The criteria
or conditions
Ea<20%
∆p(konc)=250 Pa
Ea≥20%
∆p(konc)=450 Pa
The declared frontiers
CNC/LPC<MPPS
The declared frontiers
CNC/LPC<MPPS
The group of filters The filtr.
class
The frontier of the classes in %
G
Filters for coarse dust
G1
G2
G3
G4
Am < 65
65 Am ≤Am < 80
80 Am ≤Am < 90
90 Am ≤ Am 
Em=ca. 35    
F
Filters for fine dust
M5
M6
F7
F8
F9
Am=ca. 95



Am=ca. 100
40 ≤ Em < 60
60 ≤ Em < 80
80 ≤ Em < 90
90 ≤ Em < 95
95 ≤ Em
Di=ca. 15  
H
HEPA filters for microparticles
E10
E11
E12
H13
H14
  Em=ca. 98 Di ≤ 15
Di ≤ 5
Di ≤ 0,5
Di ≤ 0,05
Di ≤ 0,005
not specified
not specified
not specified
DL ≤ 0,25
DL ≤ 0,025
U
ULPA filters for microparticles
U15
U16
U17
    Di ≤ 0,0005
Di ≤ 0,00005
Di ≤ 0,000005
DL ≤ 0,0025
DL ≤ 0,00025
DL ≤ 0,00010