ISO 29463-1:2017
(Main)High efficiency filters and filter media for removing particles from air — Part 1: Classification, performance, testing and marking
High efficiency filters and filter media for removing particles from air — Part 1: Classification, performance, testing and marking
ISO 29463-1 establishes a classification of filters based on their performance, as determined in accordance with ISO 29463‑3, ISO 29463‑4 and ISO 29463‑5. It also provides an overview of the test procedures, and specifies general requirements for assessing and marking the filters, as well as for documenting the test results. It is intended to be used in conjunction with ISO 29463‑2, ISO 29463‑3, ISO 29463‑4 and ISO 29463‑5.
Filtres et media à très haute efficacité pour la rétention particulaire — Partie 1: Classification, essais de performance et marquage
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INTERNATIONAL ISO
STANDARD 29463-1
Second edition
2017-09
High efficiency filters and filter media
for removing particles from air —
Part 1:
Classification, performance, testing
and marking
Filtres et media à très haute efficacité pour la rétention
particulaire —
Partie 1: Classification, essais de performance et marquage
Reference number
©
ISO 2017
© ISO 2017, Published in Switzerland
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ii © ISO 2017 – All rights reserved
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and abbreviated terms . 3
5 Classification . 3
6 Requirements . 4
6.1 General . 4
6.2 Material . 4
6.3 Nominal air volume flow rate . 5
6.4 Pressure difference . 5
6.5 Filtration performance . 5
7 Test methods — General requirements and test procedures overview .5
7.1 General . 5
7.2 Test rigs . 5
7.3 Test conditions . 5
7.4 Test aerosols . 6
7.5 Test methods — Principles. 6
7.5.1 Test method for flat sheet filter media . 6
7.5.2 Test method for determining the leakage of filter elements — Scan method . 9
7.5.3 Test method for determining the efficiency of filter elements .10
7.5.4 Remarks .11
8 Assessment of the filter, documentation, test reports.12
9 Marking .12
Annex A (informative) Filtration of nanoparticles .13
Annex B (informative) Summary of classification and test methods .14
Bibliography .16
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see the following
URL: www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 142, Cleaning equipment for air and
other gases.
This second edition cancels and replaces the first edition (ISO 29463-1:2011), which has been technically
revised.
This edition includes the following significant changes with respect to the previous edition:
— Table 1 has been split into two tables;
— a definition for "particle diameter" has been added;
— it has been stated that the filter test certificate shall clearly indicate if the filter has been tested
without seal fitted.
A list of all parts in the ISO 29463 series can be found on the ISO website.
iv © ISO 2017 – All rights reserved
Introduction
ISO 29463 (all parts) is derived from EN 1822 (all parts). It contains requirements, fundamental
principles of testing and the marking for, high-efficiency particulate air filters with efficiencies from
95% to 99,999 995% that can be used for classifying filters in general or for specific use by agreement
between users and suppliers.
ISO 29463 (all parts) establishes a procedure for the determination of the efficiency of all filters on the
basis of a particle counting method using a liquid (or alternatively a solid) test aerosol, and allows a
standardized classification of these filters in terms of their efficiency, both local and overall efficiency,
which actually covers most needs of different applications. The difference between this document
and other national standards lies in the technique used for the determination of the overall efficiency.
Instead of mass relationships or total concentrations, this technique is based on particle counting at
the most penetrating particle size (MPPS), which is for micro-glass filter mediums usually in the range
of 0,12 μm to 0,25 μm. This method also allows testing ultra-low penetration air filters, which was
not possible with the previous test methods because of their inadequate sensitivity. For membrane
filter media, separate rules apply, and are described in ISO 29463-5:2011, Annex B. Although no
equivalent test procedures for testing filters with charged media is prescribed, a method for dealing
with these types of filters is described in ISO 29463-5:2011, Annex C. Specific requirements for testing
method, frequency, and reporting requirements may be modified by agreement between supplier and
customer. For lower efficiency filters (Group H, as described in Clause 5), alternate leak test methods
noted in ISO 29463-4:2011, Annex A may be used by specific agreement between users and suppliers,
but only if the use of these other methods is clearly designated in the filter markings, as noted in the
annex. Although the methods prescribed in this document may be generally used to determine filter
performance for nano-size particles, testing or classification of filters for nano-size particles are beyond
the scope of this document (see Annex A for additional information).
There are differences between ISO 29463 (all parts) and other normative practices common in
several countries. For example, many of these rely on total aerosol concentrations rather than
individual particles. A brief summary of these methods and their reference standards is provided in
ISO 29463-5:2011, Annex A.
INTERNATIONAL STANDARD ISO 29463-1:2017(E)
High efficiency filters and filter media for removing
particles from air —
Part 1:
Classification, performance, testing and marking
1 Scope
This document establishes a classification of filters based on their performance, as determined in
accordance with ISO 29463-3, ISO 29463-4 and ISO 29463-5. It also provides an overview of the test
procedures, and specifies general requirements for assessing and marking the filters, as well as for
documenting the test results. It is intended to be used in conjunction with ISO 29463-2, ISO 29463-3,
ISO 29463-4 and ISO 29463-5.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 29463-2:2011, High-efficiency filters and filter media for removing particles in air — Part 2: Aerosol
production, measuring equipment and particle-counting statistics
ISO 29463-3:2011, High-efficiency filters and filter media for removing particles in air — Part 3: Testing
flat sheet filter media
ISO 29463-4:2011, High-efficiency filters and filter media for removing particles in air — Part 4: Test
method for determining leakage of filter elements-Scan method
ISO 29463-5:2011, High-efficiency filters and filter media for removing particles in air — Part 5: Test
method for filter elements
ISO 29464:2017, Cleaning equipment for air and other gases — Terminology
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 29464 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at http://www.iso.org/obp
3.1
filter medium
material used for filtering
3.2
folded pack
pack of the filter medium (3.1) formed by uniform individual folds
3.3
filter element
filter
folded pack (3.2) enclosed by a frame
3.4
efficiency
ratio of the number of particles retained by the filter to the number of the particles entering it
3.5
particle size efficiency
efficiency (3.4) for a specific particle diameter (3.6)
Note 1 to entry: The efficiency plotted as a function of the particle diameter gives the fractional efficiency curve.
3.6
particle diameter
geometric diameter (equivalent spherical, optical or aerodynamic, depending on context) of the
particles of an aerosol
Note 1 to entry: Particle diameter is often referred to simply as "particle size".
[SOURCE: ISO 29464:2017, 3.2.124]
3.7
overall efficiency
efficiency (3.
...
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