Rotary shaft lip-type seals incorporating thermoplastic sealing elements - Part 4: Performance test procedures

ISO 16589 specifies seals utilizing sealing elements manufactured from suitably formulated compounds based on thermoplastic materials, such as polytetrafluoroethylene (PTFE). They are considered suitable for use under low pressure conditions. This part of ISO 16589 specifies general performance tests which can be used for seal qualification purposes. Materials quality control, dynamic testing, and supplementary low temperature testing requirements are covered.

Bagues d'étanchéité à lèvres pour arbres tournants incorporant des éléments d'étanchéité thermoplastiques - Partie 4: Modes opératoires des essais de performance

Fluidna tehnika - Ustnične gredne tesnilke s termoplastičnimi tesnilnimi elementi - 4. del: Postopki preskušanja

General Information

Status
Published
Public Enquiry End Date
31-Jan-2014
Publication Date
09-Feb-2014
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
04-Feb-2014
Due Date
11-Apr-2014
Completion Date
10-Feb-2014

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INTERNATIONAL ISO
STANDARD 16589-4
Second edition
2011-04-15
Rotary shaft lip-type seals incorporating
thermoplastic sealing elements —
Part 4:
Performance test procedures
Bagues d'étanchéité à lèvres pour arbres tournants incorporant des
éléments d'étanchéité thermoplastiques —
Partie 4: Modes opératoires des essais de performance
Reference number
ISO 16589-4:2011(E)
ISO 2011
---------------------- Page: 1 ----------------------
ISO 16589-4:2011(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2011

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.org
Web www.iso.org
Published in Switzerland
ii © ISO 2011 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 16589-4:2011(E)
Contents Page

Foreword ............................................................................................................................................................iv

Introduction.........................................................................................................................................................v

1 Scope......................................................................................................................................................1

2 Normative references............................................................................................................................1

3 Terms and definitions ...........................................................................................................................2

4 Pre-test procedure.................................................................................................................................2

5 Dynamic normal temperature test .......................................................................................................2

5.1 Test apparatus .......................................................................................................................................2

5.2 Installation..............................................................................................................................................4

5.3 Test conditions ......................................................................................................................................5

5.4 Test procedure.......................................................................................................................................5

5.5 Post-test measurements.......................................................................................................................5

5.6 Recording...............................................................................................................................................5

5.7 Acceptance criteria ...............................................................................................................................5

6 Dynamic low temperature test .............................................................................................................5

6.1 General ...................................................................................................................................................5

6.2 Test apparatus .......................................................................................................................................5

6.3 Installation..............................................................................................................................................6

6.4 Test procedure.......................................................................................................................................6

6.5 Post-test measurements.......................................................................................................................7

6.6 Recording...............................................................................................................................................7

6.7 Acceptance criteria ...............................................................................................................................7

7 Material testing of the rotary shaft seal components........................................................................7

7.1 General ...................................................................................................................................................7

7.2 Metallic components (cases) ...............................................................................................................7

7.3 Non-metallic components.....................................................................................................................7

7.3.1 Thermoplastic sealing elements..........................................................................................................7

7.3.2 Elastomeric sealing elements — gaskets, protection lip and sealant.............................................7

8 Identification statement (Reference to this part of ISO 16589)............................................................7

Annex A (informative) Typical example of seal test report for the dynamic normal temperature

test ..........................................................................................................................................................8

Annex B (informative) Typical example of a seal test report for the dynamic low temperature test .......10

Annex C (informative) Typical example of a material test report (thermoplastic element).......................12

Annex D (informative) Typical example of a material test report (elastomeric element) ..........................13

Bibliography......................................................................................................................................................15

© ISO 2011 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO 16589-4:2011(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 2.

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.

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.

ISO 16589-4 was prepared by Technical Committee ISO/TC 131, Fluid power systems, Subcommittee SC 7,

Sealing devices.

This second edition cancels and replaces the first edition (ISO 16589-4:2001), which has been technically

revised.

ISO 16589 consists of the following parts, under the general title Rotary shaft lip-type seals incorporating

thermoplastic sealing elements:
⎯ Part 1: Nominal dimensions and tolerances
⎯ Part 2: Vocabulary
⎯ Part 3: Storage, handling and installation
⎯ Part 4: Performance test procedures
⎯ Part 5: Identification of visual imperfections
iv © ISO 2011 – All rights reserved
---------------------- Page: 4 ----------------------
ISO 16589-4:2011(E)
Introduction

Rotary shaft lip-type seals are used to retain fluid in equipment where the differential pressure is relatively low.

Typically, the shaft rotates and the housing is stationary, although in some applications the shaft is stationary

and the housing rotates.

Dynamic sealing is normally the result of a designed interference fit between the shaft and a flexible element

incorporated in the seal.

Similarly, a designed interference fit between the outside diameter of the seal and the diameter of the housing

bore retains the seal and prevents static leakage.

Careful storage and handling and proper installation of all seals are necessary to avoid hazards, both prior to

and during installation, which would adversely affect service life.
© ISO 2011 – All rights reserved v
---------------------- Page: 5 ----------------------
INTERNATIONAL STANDARD ISO 16589-4:2011(E)
Rotary shaft lip-type seals incorporating thermoplastic sealing
elements —
Part 4:
Performance test procedures

WARNING — Persons using this part of ISO 16589 should be familiar with normal laboratory practice.

Whilst this part of ISO 16589 does not purport to address all the safety problems, if any, associated

with its application, attention is drawn to the need to employ sensible precautions while handling hot

and cold fluids and equipment. It is the responsibility of the user of this part of ISO 16589 to establish

appropriate safety and health practices and to ensure compliance with any national regulatory

conditions.
1 Scope

ISO 16589 specifies seals utilizing sealing elements manufactured from suitably formulated compounds based

on thermoplastic materials, such as polytetrafluoroethylene (PTFE). They are considered suitable for use

under low pressure conditions.

This part of ISO 16589 specifies general performance tests which can be used for seal qualification purposes.

Materials quality control, dynamic testing, and supplementary low temperature testing requirements are

covered.

NOTE ISO 16589 is complementary to ISO 6194, which covers seals incorporating elastomeric sealing elements.

2 Normative references

The following referenced documents are indispensable for the application 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 5598, Fluid power systems and components — Vocabulary

ISO 16589-1, Rotary shaft lip-type seals incorporating thermoplastic sealing elements — Part 1: Nominal

dimensions and tolerances

ISO 16589-2, Rotary shaft lip-type seals incorporating thermoplastic sealing elements — Part 2: Vocabulary

© ISO 2011 – All rights reserved 1
---------------------- Page: 6 ----------------------
ISO 16589-4:2011(E)
3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 5598 and ISO 16589-2 and the

following apply.
3.1
batch

identifiable and traceable consignment of thermoplastic and rubber compounds of definite composition and

manufactured in a single production operation
4 Pre-test procedure

4.1 Inspect all seals submitted for testing, for conformity to a relevant drawing or detailed specification,

declared by the seal manufacturer.

4.2 Ensure that the seal manufacturer has stated the material batch numbers from which the seals have

been manufactured. For seals with an elastomeric component, ensure that the seal manufacturer has stated

the material batch number from which the elastomeric component of the seal has been made.

4.3 To facilitate accurate analysis of the test results, determine the following data concerning the physical

characteristics of the seal and test apparatus before testing:
a) lip diameter immediately prior to assembly onto the shaft;
b) lip thickness when measured as assembled on the test shaft;
c) outer case mean diameter and out of roundness;
d) shaft diameter, material, hardness and surface roughness;
e) housing diameter, material and surface roughness;
f) protection lip diameter, when applicable.
For a), b) and f), measuring instruments with sharp edges should not be used.
The radial lip load should not be measured before the test.

4.4 Ensure that the specified shaft eccentricity and housing offset of the test apparatus have been

incorporated.
5 Dynamic normal temperature test
5.1 Test apparatus

The test apparatus shall be similar to the typical example shown in Figure 1 and shall consist of a suitable

housing for retaining the test fluid and for positioning the test seals, as well as a rotating member having a

spindle mounted horizontally on suitable bearings. The design of the housing for the seal shall be in

accordance with the dimensions specified in ISO 16589-1. The housing and the rotating member shall be

capable of reproducing the eccentricity and offset referred to in 4.4.
2 © ISO 2011 – All rights reserved
---------------------- Page: 7 ----------------------
ISO 16589-4:2011(E)
The test apparatus shall also conform to the following additional requirements.

a) The shaft shall be capable of cycling and/or maintaining the shaft speeds to within ±5 %.

b) The shaft shall be capable of maintaining the specified test eccentricity under dynamic conditions to

within ±0,03 mm throughout each test.

c) The test head shall be designed and constructed so as to maintain the housing bore alignment relative to

the test shaft axis within ±0,03 mm throughout the operating temperature range.

d) The design of the test head support shall ensure minimum deformation and vibration.

e) The test head and heat transfer system shall be capable of maintaining the temperature of the test fluid

within ±5 °C and shall be vented to atmosphere.

f) Heat shall be applied in a manner that does not subject the test fluid to high localized temperatures which

could cause fluid decomposition.

g) The test shaft shall have a surface which is free of helical machine marks and shall comply with the

requirements for shafts specified in ISO 16589-1, Clause 7.

h) The test housing bore shall comply with the requirements specified in ISO 16589-1, Clause 8.

i) The material properties — including hardness, surface finish and dimensions of the test shaft and test

housing bore — shall conform as closely as possible to the shaft and housing bore to be used in service.

j) A minimum quantity of 750 cm of test fluid shall be used.

k) The level of the test fluid in the test head shall be 0,3 D to 0,5 D above the lowest point of the shaft

1 1
diameter D .

l) Where the seal housings have inboard bearings, the test housing shall be suitably relieved at the bearing

supports to prevent excessive fluid pressure between the bearing and seals.
m) Means shall be provided for collecting and measuring the mass of
...

SLOVENSKI STANDARD
SIST ISO 16589-4:2014
01-marec-2014
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SIST ISO 16589-4:2002

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Rotary shaft lip-type seals incorporating thermoplastic sealing elements - Part 4:

Performance test procedures
Bagues d'étanchéité à lèvres pour arbres tournants incorporant des éléments

d'étanchéité thermoplastiques - Partie 4: Modes opératoires des essais de performance

Ta slovenski standard je istoveten z: ISO 16589-4:2011
ICS:
23.100.60 )LOWULWHVQLODLQ Filters, seals and
RQHVQDåHYDQMHWHNRþLQ contamination of fluids
SIST ISO 16589-4:2014 en,fr

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST ISO 16589-4:2014
---------------------- Page: 2 ----------------------
SIST ISO 16589-4:2014
INTERNATIONAL ISO
STANDARD 16589-4
Second edition
2011-04-15
Rotary shaft lip-type seals incorporating
thermoplastic sealing elements —
Part 4:
Performance test procedures
Bagues d'étanchéité à lèvres pour arbres tournants incorporant des
éléments d'étanchéité thermoplastiques —
Partie 4: Modes opératoires des essais de performance
Reference number
ISO 16589-4:2011(E)
ISO 2011
---------------------- Page: 3 ----------------------
SIST ISO 16589-4:2014
ISO 16589-4:2011(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2011

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.org
Web www.iso.org
Published in Switzerland
ii © ISO 2011 – All rights reserved
---------------------- Page: 4 ----------------------
SIST ISO 16589-4:2014
ISO 16589-4:2011(E)
Contents Page

Foreword ............................................................................................................................................................iv

Introduction.........................................................................................................................................................v

1 Scope......................................................................................................................................................1

2 Normative references............................................................................................................................1

3 Terms and definitions ...........................................................................................................................2

4 Pre-test procedure.................................................................................................................................2

5 Dynamic normal temperature test .......................................................................................................2

5.1 Test apparatus .......................................................................................................................................2

5.2 Installation..............................................................................................................................................4

5.3 Test conditions ......................................................................................................................................5

5.4 Test procedure.......................................................................................................................................5

5.5 Post-test measurements.......................................................................................................................5

5.6 Recording...............................................................................................................................................5

5.7 Acceptance criteria ...............................................................................................................................5

6 Dynamic low temperature test .............................................................................................................5

6.1 General ...................................................................................................................................................5

6.2 Test apparatus .......................................................................................................................................5

6.3 Installation..............................................................................................................................................6

6.4 Test procedure.......................................................................................................................................6

6.5 Post-test measurements.......................................................................................................................7

6.6 Recording...............................................................................................................................................7

6.7 Acceptance criteria ...............................................................................................................................7

7 Material testing of the rotary shaft seal components........................................................................7

7.1 General ...................................................................................................................................................7

7.2 Metallic components (cases) ...............................................................................................................7

7.3 Non-metallic components.....................................................................................................................7

7.3.1 Thermoplastic sealing elements..........................................................................................................7

7.3.2 Elastomeric sealing elements — gaskets, protection lip and sealant.............................................7

8 Identification statement (Reference to this part of ISO 16589)............................................................7

Annex A (informative) Typical example of seal test report for the dynamic normal temperature

test ..........................................................................................................................................................8

Annex B (informative) Typical example of a seal test report for the dynamic low temperature test .......10

Annex C (informative) Typical example of a material test report (thermoplastic element).......................12

Annex D (informative) Typical example of a material test report (elastomeric element) ..........................13

Bibliography......................................................................................................................................................15

© ISO 2011 – All rights reserved iii
---------------------- Page: 5 ----------------------
SIST ISO 16589-4:2014
ISO 16589-4:2011(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 2.

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.

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.

ISO 16589-4 was prepared by Technical Committee ISO/TC 131, Fluid power systems, Subcommittee SC 7,

Sealing devices.

This second edition cancels and replaces the first edition (ISO 16589-4:2001), which has been technically

revised.

ISO 16589 consists of the following parts, under the general title Rotary shaft lip-type seals incorporating

thermoplastic sealing elements:
⎯ Part 1: Nominal dimensions and tolerances
⎯ Part 2: Vocabulary
⎯ Part 3: Storage, handling and installation
⎯ Part 4: Performance test procedures
⎯ Part 5: Identification of visual imperfections
iv © ISO 2011 – All rights reserved
---------------------- Page: 6 ----------------------
SIST ISO 16589-4:2014
ISO 16589-4:2011(E)
Introduction

Rotary shaft lip-type seals are used to retain fluid in equipment where the differential pressure is relatively low.

Typically, the shaft rotates and the housing is stationary, although in some applications the shaft is stationary

and the housing rotates.

Dynamic sealing is normally the result of a designed interference fit between the shaft and a flexible element

incorporated in the seal.

Similarly, a designed interference fit between the outside diameter of the seal and the diameter of the housing

bore retains the seal and prevents static leakage.

Careful storage and handling and proper installation of all seals are necessary to avoid hazards, both prior to

and during installation, which would adversely affect service life.
© ISO 2011 – All rights reserved v
---------------------- Page: 7 ----------------------
SIST ISO 16589-4:2014
---------------------- Page: 8 ----------------------
SIST ISO 16589-4:2014
INTERNATIONAL STANDARD ISO 16589-4:2011(E)
Rotary shaft lip-type seals incorporating thermoplastic sealing
elements —
Part 4:
Performance test procedures

WARNING — Persons using this part of ISO 16589 should be familiar with normal laboratory practice.

Whilst this part of ISO 16589 does not purport to address all the safety problems, if any, associated

with its application, attention is drawn to the need to employ sensible precautions while handling hot

and cold fluids and equipment. It is the responsibility of the user of this part of ISO 16589 to establish

appropriate safety and health practices and to ensure compliance with any national regulatory

conditions.
1 Scope

ISO 16589 specifies seals utilizing sealing elements manufactured from suitably formulated compounds based

on thermoplastic materials, such as polytetrafluoroethylene (PTFE). They are considered suitable for use

under low pressure conditions.

This part of ISO 16589 specifies general performance tests which can be used for seal qualification purposes.

Materials quality control, dynamic testing, and supplementary low temperature testing requirements are

covered.

NOTE ISO 16589 is complementary to ISO 6194, which covers seals incorporating elastomeric sealing elements.

2 Normative references

The following referenced documents are indispensable for the application 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 5598, Fluid power systems and components — Vocabulary

ISO 16589-1, Rotary shaft lip-type seals incorporating thermoplastic sealing elements — Part 1: Nominal

dimensions and tolerances

ISO 16589-2, Rotary shaft lip-type seals incorporating thermoplastic sealing elements — Part 2: Vocabulary

© ISO 2011 – All rights reserved 1
---------------------- Page: 9 ----------------------
SIST ISO 16589-4:2014
ISO 16589-4:2011(E)
3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 5598 and ISO 16589-2 and the

following apply.
3.1
batch

identifiable and traceable consignment of thermoplastic and rubber compounds of definite composition and

manufactured in a single production operation
4 Pre-test procedure

4.1 Inspect all seals submitted for testing, for conformity to a relevant drawing or detailed specification,

declared by the seal manufacturer.

4.2 Ensure that the seal manufacturer has stated the material batch numbers from which the seals have

been manufactured. For seals with an elastomeric component, ensure that the seal manufacturer has stated

the material batch number from which the elastomeric component of the seal has been made.

4.3 To facilitate accurate analysis of the test results, determine the following data concerning the physical

characteristics of the seal and test apparatus before testing:
a) lip diameter immediately prior to assembly onto the shaft;
b) lip thickness when measured as assembled on the test shaft;
c) outer case mean diameter and out of roundness;
d) shaft diameter, material, hardness and surface roughness;
e) housing diameter, material and surface roughness;
f) protection lip diameter, when applicable.
For a), b) and f), measuring instruments with sharp edges should not be used.
The radial lip load should not be measured before the test.

4.4 Ensure that the specified shaft eccentricity and housing offset of the test apparatus have been

incorporated.
5 Dynamic normal temperature test
5.1 Test apparatus

The test apparatus shall be similar to the typical example shown in Figure 1 and shall consist of a suitable

housing for retaining the test fluid and for positioning the test seals, as well as a rotating member having a

spindle mounted horizontally on suitable bearings. The design of the housing for the seal shall be in

accordance with the dimensions specified in ISO 16589-1. The housing and the rotating member shall be

capable of reproducing the eccentricity and offset referred to in 4.4.
2 © ISO 2011 – All rights reserved
---------------------- Page: 10 ----------------------
SIST ISO 16589-4:2014
ISO 16589-4:2011(E)
The test apparatus shall also conform to the following additional requirements.

a) The shaft shall be capable of cycling and/or maintaining the shaft speeds to within ±5 %.

b) The shaft shall be capable of maintaining the specified test eccentricity under dynamic conditions to

within ±0,03 mm throughout each test.

c) The test head shall be designed and constructed so as to maintain the housing bore alignment relative to

the test shaft axis within ±0,03 mm throughout the operating temperature range.

d) The design of the test head support shall ensure minimum deformation and vibration.

e) The test head and heat transfer system shall be capable of maintaining the temperature of the test fluid

within ±5 °C and shall be vented to atmosphere.

f) Heat shall be applied in a manner that does not subject the test fluid to high localized temperatures which

could cause fluid decomposition.

g) The test shaft shall have a surface which is free of helical machine marks and shall comply with the

requirements for shafts specified in ISO 16589-1, Clause 7.

h) The test housing bore shall comply with the requirements specified in ISO 16589-1, Clause 8.

i) The material properties — including hardness, surface finish and dimensions of the test shaft and test

housing bore — shall co
...

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