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P. 270
Appendix
Changes to ISO Standards and their impact on Filter Performance
Reporting and the Contamination Code, continued.
ISO 16889 is the new multi-pass test standard for
measuring fi lter performance and utilizes ISO MTD
as the contaminant challenge. This standard is
replacing ISO 4572 which utilized ACFTD. See
the following graphs below for fi ltration beta ratio
comparisons on our 2Q, 5Q, 10Q, and 20Q
Microglass III media. The graphs refl ect
multi-pass test results using ISO 4572 with ACFTD
and the revised ISO 16889 using ISO MTD.
FILTRATION RATIOS FOR 2Q MEDIA FILTRATION RATIOS FOR 10Q MEDIA
10000
10000
ISO 4572
ISO 4572 1000
FILTRATION RATIO (BETA) 200 ISO 16889 FILTRATION RATIO (BETA) 200 ISO 4572 ISO 16889
1000
ISO 16889
ISO 16889
100
100
ISO 4572
10
10
1
1
0 1 3 4 5 6 7
2
0 2 4 6 8 10 12 14 16
PARTICLE SIZE um or um(c)
FILTRATION RATIOS FOR 5Q MEDIA FILTRATION RATIOS FOR 20Q MEDIA
10000
10000
FILTRATION RATIO (BETA) 200 ISO 16889 FILTRATION RATIO (BETA) 1000 ISO 16889 ISO 4572
ISO 4572
ISO 4572
ISO 16889
1000
ISO 16889
200
ISO 4572
100
100
10
10
1
1
0 1 2 3 4 5 6 7 8 9 10 0 5 10 15 20 25 30
PARTICLE SIZE um or um(c) PARTICLE SIZE um or um(c)
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