THE FILTRATION EFFICIENCY.
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The filtration efficiency
deals with the capacity of a filter to retain the toxics handled
in the enclosure.
According to the most demanding filtration standards (CSA Z316.5,
ANSI/AIHA Z9.5, and particularly the AFNOR NF X 15-211standard), the filter must not release more than 1% of the permissible
value of a toxic within the air of a working area (this is to
prevent the accumulation of the release of unauthorized toxics).
Furthermore, the manufacturer must produce official test reports
with hydrochloric acid, carbon tetrachloride and toluene proving
the filtration efficiency and confirming the quantities of chemicals
they certified to be possibly retained on the appropriate filter
in the Guide of filtered products. For the totality of the chemicals
mentioned in the Chemical Listing, the manufacturer is commited
to the quantities of chemicals he certifies to be handled in the
enclosure and retained on the appropriate filter, while guaranteeing
the same filtration efficiency. |
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NATIONAL LABORATORY TEST REPORT
The air released by the filter
contains 100 times less pollutants than the acceptable
limit values defined by the official safety authorities. |
captair® "LIST OF APPROVED CHEMICAL "
erlab created the List of approved chemical, which
analyses more than 600 chemicals. With the help of this
Chemical Listing, you will know the toxicity level of
the product handled, which filter has the best retention
for it and how to determine the filter saturation detection
method. |
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THE APPLIED TEST LAB
If you want to handle chemicals
which are not mentioned in the Guide of filtered chemicals
the erlab® applied test laboratory and its ValiQuest® validation
service will give you a full test report within 2 to
5 days. |
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You can not rely on the retention capacity of a filter expressed
as a % of the weight of the molecular filter.
Such quantities are purely
theoritical : they do not take into account the toxicity
level of the chemicals handled (TLV, MAK, OEL or VME)
and allow such an unrealistic filter saturation that the
filtration efficiency is reduced to 0%. |
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