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Respect of The Standards
The
ASTM Standard or American Standard Method is a standard that
concerns carbon as a raw material used for the manufacturing of
filters. This standard is an evaluation method designed to evaluate
the quality of carbon only as a raw material used for the manufacturing
of filters. This ASTM standard is used by asura filtersŪ
to control its own raw material before it is introduced in the
manufacturing of filters. The ASTM standard is not in any way
a guarantee of filter reliability in terms of retention capacity
or filtration quality when used with a toxic chemical. However,
this standard is very important to a manufacturer in order to
select a product of good quality. asura filtersŪ requires that a
carbon quality corresponding to a minimum of 70% for CCl4
be obtained as per the ASTM standard. This level of performance
corresponds to a high quality which is that of filters used for
gas masks.
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The
CAN CSA Z316.5-94 and the AFNOR NFX 15-211 are presently the
only two standards capable of guaranteeing the quality of the
recirculated air that a user will breathe during the entire
life of a filter before it reaches saturation, as required by
the two standard.
Under precise conditions of use* asura FiltersŪ guarantees that all its filters are in compliance
with these two standards for more than 200 pollutants as described in
its "Chemical Listing" supplied with all filters.
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