ISO/TS 13353:2002

TECHNICAL ISO/TS
SPECIFICATION 13353
First edition
2002-08-15

Diesel fuel and petrol filters for internal
combustion engines — Initial efficiency by
particle counting
Filtres à carburant pour moteurs à combustion interne à essence
ou diesel — Efficacité initiale par comptage des particules




Reference number
ISO/TS 13353:2002(E)
©
ISO 2002

---------------------- Page: 1 ----------------------
ISO/TS 13353:2002(E)
PDF disclaimer
This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not
be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this
file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat accepts no liability in this
area.
Adobe is a trademark of Adobe Systems Incorporated.
Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters
were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event
that a problem relating to it is found, please inform the Central Secretariat at the address given below.


©  ISO 2002
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic
or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISO's member body
in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.ch
Web www.iso.ch
Printed in Switzerland

ii © ISO 2002 – All rights reserved

---------------------- Page: 2 ----------------------
ISO/TS 13353:2002(E)
Contents Page
Foreword . iv
1 Scope. 1
2 Normative references. 1
3 Symbols. 2
4 Principle. 2
5 Test equipment. 3
6 Validation procedures. 5
7 Test procedure. 7
8 Report of data . 9
Annex A (normative) Damper . 10
Annex B (normative) Flush-type static pressure tap . 11
Annex C (normative) Procedure for test dust and test fluid mixing. 12
Annex D (normative) Test report. 13
Annex E (normative) Specification of test fluid for filter test. 16
Bibliography. 17

© ISO 2002 – All rights reserved iii

---------------------- Page: 3 ----------------------
ISO/TS 13353:2002(E)
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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3.
The main task of technical committees is to prepare International Standards. Draft International Standards adopted
by the technical committees are circulated to the member bodies for voting. Publication as an International
Standard requires approval by at least 75 % of the member bodies casting a vote.
In other circumstances, particularly when there is an urgent market requirement for such documents, a technical
committee may decide to publish other types of normative document:
— an ISO Publicly Available Specification (ISO/PAS) represents an agreement between technical experts in an
ISO working group and is accepted for publication if it is approved by more than 50 % of the members of the
parent committee casting a vote;
— an ISO Technical Specification (ISO/TS) represents an agreement between the members of a technical
committee and is accepted for publication if it is approved by 2/3 of the members of the committee casting a
vote.
An ISO/PAS or ISO/TS is reviewed after three years with a view to deciding whether it should be confirmed for a
further three years, revised to become an International Standard, or withdrawn. In the case of a confirmed ISO/PAS
or ISO/TS, it is reviewed again after six years at which time it has to be either transposed into an International
Standard or withdrawn.
Attention is drawn to the possibility that some of the elements of this Technical Specification may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO/TS 13353 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 7, Injection
equipment and filters for use on road vehicles.
This first edition cancels and replaces ISO/TR 13353:1994, which has been technically revised.
Annexes A to E form a normative part of this Technical Specification.

iv © ISO 2002 – All rights reserved

---------------------- Page: 4 ----------------------
TECHNICAL SPECIFICATION ISO/TS 13353:2002(E)

Diesel fuel and petrol filters for internal combustion engines —
Initial efficiency by particle counting
1 Scope
This Technical Specification specifies a test procedure for evaluating the initial efficiency of an internal combustion
engine fuel filter by submitting the filter to a constant flow rate of test liquid. It is applicable to diesel and petrol
filters having a rated flow of from 50 l/h to 250 l/h. By agreement between filter manufacturer and customer, the
procedure, with some modification, can be used for fuel filters with higher flow rates.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of
this Technical Specification. For dated references, subsequent amendments to, or revisions of, any of these
publications do not apply. However, parties to agreements based on this Technical Specification are encouraged to
investigate the possibility of applying the most recent editions of the normative documents indicated below. For
undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC
maintain registers of currently valid International Standards.
ISO 2942, Hydraulic fluid power — Filter elements — Verification of fabrication integrity and determination of the
first bubble point
ISO 3722, Hydraulic fluid power — Fluid sample containers — Qualifying and controlling cleaning methods
ISO 3968, Hydraulic fluid power — Filters — Evaluation of differential pressure versus flow characteristics
ISO 4021, Hydraulic fluid power — Particulate contamination analysis — Extraction of fluid samples from lines of
an operating system
ISO 4405, Hydraulic fluid power — Fluid contamination — Determination of particulate contamination by the
gravimetric method
ISO 4548-12:2000, Methods of test for full-flow lubricating oil filters for internal combustion engines — Part 12:
Filtration efficiency using particle counting, and contaminant retention capacity
ISO 11171, Hydraulic fluid power — Calibration of automatic particle counters for liquids
ISO 11943, Hydraulic fluid power — On-line automatic particle-counting systems for liquids — Methods of
calibration and validation
ISO 12103-1, Road vehicles — Test dust for filter evaluation — Part 1: Arizona test dust
© ISO 2002 – All rights reserved 1

---------------------- Page: 5 ----------------------
ISO/TS 13353:2002(E)
3 Symbols
For the purposes of this Technical Specification, the symbols given in Table 1 apply.
Table 1 — Symbols
Symbol Unit Definition Recommended
value
C mg/l Gravimetric upstream level —
e
C mg/l Upstream gravimetric level for initial efficiency 5

e1
C mg/l Gravimetric injection sump level (initial value) —
i,i
C mg/l Gravimetric injection sump level (end value) —
i,e
C mg/l Gravimetric injection sump level (mean value) —
i,m
E % Efficiency by number —
F — Safety factor 1,2

s
m mg Quantity of dust —
m g Total dust addition in 60 min (efficiency test) —

i,e
a
N µm(c)/ml Number of particles upstream (differential counts) —
0
a
N µm(c)/ml Number of particles downstream (differential counts) —

1
a
N µm(c)/ml Initial test system cleanness [number of particles > 4 µm(c)/ml] —
i
q l/min Minimum flow rate —

Ve
q l/min Test flow rate —
V
e1
q —
Vi
ml/min Injection flow rate
q 100
V
i1
q ml/min Injection flow rate (initial value) —
V
i,i
q ml/min Injection flow rate (end value) —
V
i,e
q ml/min Injection flow rate (mean value) —
V
i,m
t min Test duration —
V l Volume of test circuit 6
V l Volume of fluid for validation of injection system 12

i
Final sump volume (see D.1) —
V l
F
Total volume [see 5.4.2, a)] —
a
Throughout this Technical Specification, micrometres (c) [µm(c)] means that a particle size measurement is carried out using an
automatic particle counter calibrated in accordance with ISO 11171.

4 Principle
The procedure uses a test fluid with a low concentration of contaminant. The initial efficiency of the filter is
evaluated by particle counting upstream and downstream of the filter, allowing on-line particle counting without
dilution.
2 © ISO 2002 – All rights reserved

---------------------- Page: 6 ----------------------
ISO/TS 13353:2002(E)
5 Test equipment
5.1 Test fluid
2
This shall be hydraulic fluid as specified in annex E, or equivalent, with a viscosity of 10 mm /s min. at 40 °C.
5.2 Test contaminant
The test contaminant shall be ISO 12103-A3 (ISO medium test dust) in accordance with ISO 12103-1.
5.3 Laboratory equipment
5.3.1 Automatic particle counter
The counter or counters shall be calibrated and validated in accordance with ISO 11171 and ISO 11943.
5.3.2 Sampling bottles and glassware
Bottles and glassware shall be cleaned and qualified in accordance with ISO 3722.
5.4 Test stand
5.4.1 General
An example of a test stand, comprising filter test circuit and injection system, is shown in Figure 1. The test stand is
specified in 5.4.2 and 5.4.3. The alphanumeric references in brackets in the following subclauses and throughout
this Technical Specification correspond to the test stand components as numbered in Figure 1.
5.4.2 Filter test circuit (see Figure 1)
The main reservoir (4) shall have a conical bottom with an included angle of not more than 90° and with the fluid
entering below the fluid surface. The total volume, V , of the test fluid in the circuit is 6 l.
F
The main pump (10), with a variable rotational frequency, is insensitive to the contaminant and does not alter the
contaminant’s particle size distribution. The pump shall not induce excessive flow pulsations (less than 1 % of
mean pressure). A suitable solution (damper) is given in annex A.
NOTE 1 For the main pump, a diaphragm-type dosing pump with two pistons is suitable.
Clean-up filters (5a and 5b) shall be capable of providing an initial contamination level of less than 30 particles per
millilitre of a size greater than 4 µm(c). The clean-up filter (5b) shall be on-line during the initial efficiency test.
Upstream and downstream samplers (8a and 8b) in accordance with ISO 4021 shall be provided. On-line particle
counting is the recommended method. Bottle sampling may be used as an alternative, but this shall be clearly
indicated in the report.
The sampling pumps (8) allow flow control of both upstream and downstream sample flow. The sensor shall be
calibrated at the used sampling flow rate. The injection flow rate shall be twice this flow.
NOTE 2 For the sampling pumps, double-headed peristaltic pumps are suitable.
NOTE 3 Sampling flow rate is stated to be 50 ml/min (maximum).
All pipes and the reservoir (4) shall be chosen so as to avoid particle settling or segregation. For the test flow rates
applicable to this Technical Specification, pipes of a 6 mm inside diameter are recommended. The reservoir height
should be 1,5 to three times its diameter.
© ISO 2002 – All rights reserved 3

---------------------- Page: 7 ----------------------
ISO/TS 13353:2002(E)
Pressure taps shall be in accordance with ISO 3968 and annex B and shall be placed as shown in Figure 1.
Pressure gauges, temperature indicators, flowmeters and controllers shall be able to ensure the test condition
accuracy given in 5.5.

Key
1 Injection tank 10 Dosing pump (two pistons) with damper (see annex A)
2 Valve for isolating injection pump 11 Contaminant injection pump
3 Mechanical mixer 12 Recirculation injection pump
4 Main reservoir 13 Heat control system
5a Main clean-up filter with high capacity 14 Injection sampling taps (outlets)
5b Return clean-up filter with high efficiency 15 Level indicator
5c Injection clean-up filter 16 Temperature indicator
6 Pressure indicator 17 Flush-type static pressure tap (see annex B)
7 Test filter x straight length of pipe
8 Sampling pumps D pipe inside diameter, in millimetres
8a Upstream sampling line x = 10D
1
8b Downstream sampling line x = 5D
2
9 Flowmeter
NOTE For fluid power system component graphic symbols, see ISO 1219-1.
Figure 1 — Test stand circuit diagram — Example
4 © ISO 2002 – All rights reserved

---------------------- Page: 8 ----------------------
ISO/TS 13353:2002(E)
5.4.3 Injection system
The injection tank (1) shall have a conical bottom with an included angle of not more than 90° and with the fluid
entering below the fluid surface. The volume of the tank should be appropriate to the most probable test duration
and calculated on the basis of an injection flow rate of 100 ml/min max.
The injection tank (1) shall be equipped with a recirculation pump (12) and stirrer (3). The recirculation flow rate in
litres per minute should be at least twice the injection fluid volume in litres.
NOTE 1 For the recirculation pump, a centrifugal type pump is suitable.
All pipes and the tanks should be chosen so as to avoid particle settling or segregation. Pipe lengths should be
minimized.
The contaminant injection pump (11) shall have a variable rotational frequency. The injection flow rate shall be
maintained at 100 ml/min max. (accuracy in accordance with Table 2).
NOTE 2 For the contaminant injection pump, a three-roller peristaltic type pump is suitable.
The temperature and level of injection fluids (15) are continuously indicated.
5.5 Test condition accuracy
Set up and maintain the test condition accuracy in accordance with Table 2.
Table 2 — Test condition accuracy
Test condition Allowable deviation from
actual value
Flow, flow rate ± 2 %
Pressure ± 2 %
Temperature ± 2 °C
Volume ± 2 %
Test dust ± 0,5 mg
6 Validation procedures
6.1 General
The validation test is conducted at the minimum flow rate in order to verify that the contaminant is not altered by the
components of the circuit, to prove the ability of the main clean-
...