ISO 16589-5:2011

Rotary shaft lip-type seals incorporating thermoplastic sealing elements - Part 5: Identification of visual imperfections

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. ISO 16589-5:2011 defines and classifies typical surface imperfections that could impair the function of the seals, and is intended as a convenience for purchasers and manufacturers in their discussions concerning the importance of these imperfections in different applications.

Bagues d'étanchéité à lèvres pour arbres tournants incorporant des éléments d'étanchéité thermoplastiques — Partie 5: Identification des imperfections visuelles

Fluidna tehnika - Ustnične gredne tesnilke s termoplastičnimi tesnilnimi elementi - 5. del: Prepoznavanje vidnih nepravilnosti

General Information

• Status: Published
• Publication Date: 06-Apr-2011
• ICS: 23.100.60 - Filters, seals and contamination of fluids
• ICS: 83.140.50 - Seals
• Technical Committee: ISO/TC 131/SC 7 - Sealing devices
• Drafting Committee: ISO/TC 131/SC 7/WG 4 - Rotary shaft lip type seals
• Current Stage: 9093 - International Standard confirmed
• Start Date: 12-Sep-2022
• Completion Date: 13-Dec-2025
• Ref Project: SIST ISO 16589-5:2014 - Rotary shaft lip-type seals incorporating thermoplastic sealing elements - Part 5: Identification of visual imperfections

Relations

• Revises: ISO 16589-5:2001 - Rotary shaft lip-type seals incorporating thermoplastic sealing elements - Part 5: Identification of visual imperfections
• Effective Date: 06-Mar-2009

Overview

ISO 16589-5:2011 is the part of the ISO 16589 series that defines and classifies typical visual imperfections in rotary shaft lip-type seals that incorporate thermoplastic sealing elements (for example PTFE-based compounds). The standard applies to seals intended for relatively low-pressure applications and is intended as a practical reference to help manufacturers, purchasers and inspectors agree on which surface defects are significant for different applications. It complements the other parts of ISO 16589 (dimensions, vocabulary, storage/handling, performance tests).

Key topics

• Scope and applicability: Seals with sealing elements made from suitably formulated thermoplastic compounds (e.g., PTFE) used in low-pressure rotary shaft applications.
• Sealing lip critical area: Definition and emphasis on the critical region of the sealing lip where imperfections are most likely to affect performance.
• Catalogue of visual imperfections: Illustrated and named defect types commonly encountered, including:
  • Tear, cut, nick
  • Non-fill and flash
  • Inclusion, polymer window, filler projections
  • Crack, gasket extrusion, incomplete trim, folded flash
  • Sealing lip inversion, lip eccentricity
  • Rough surface finish and incorrect hydrodynamic aid direction
  • Outer circumference issues (scratch, incorrect chamfer, incomplete bond) and protection lip defects
• Identification and reporting: Recommended identification statement for use in test reports, catalogues and sales literature: “Visual imperfection identification is in accordance with ISO 16589-5, Rotary shaft lip-type seals incorporating thermoplastic sealing elements - Part 5: Identification of visual imperfections.”

Applications and users

ISO 16589-5 is practical for:

• Seal manufacturers - to standardize visual quality criteria and reduce disputes with customers.
• Purchasers and procurement teams - to specify acceptable visual quality levels in orders and contracts.
• Quality control and inspection personnel - to identify and classify defects during incoming inspection or production.
• Design engineers and maintenance teams - to understand which imperfections can impair sealing performance and service life. Typical industry contexts include hydraulic/pneumatic components, low-pressure rotating equipment (pumps, motors, gearboxes) and general fluid power systems where thermoplastic lip seals are used.

Related standards

• ISO 16589 (other parts): Part 1 (dimensions), Part 2 (vocabulary), Part 3 (storage/handling/installation), Part 4 (performance tests)
• ISO 6194 series (covers rotary lip seals with elastomeric sealing elements) - complementary reference for elastomeric seal standards.

Keywords: ISO 16589-5:2011, rotary shaft lip-type seals, thermoplastic sealing elements, PTFE seals, visual imperfections, sealing lip critical area, seal inspection, low-pressure seals.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Bagues d'étanchéité à lèvres pour arbres tournants incorporant des éléments d'étanchéité thermoplastiques - Partie 5: Identification des imperfections visuellesRotary shaft lip-type seals incorporating thermoplastic sealing elements - Part 5: Identification of visual imperfections23.100.60Filters, seals and contamination of fluidsICS:Ta slovenski standard je istoveten z:ISO 16589-5:2011oSIST ISO 16589-5:2014en,fr01-januar-2014oSIST ISO 16589-5:2014SLOVENSKI
STANDARD
oSIST ISO 16589-5:2014
Reference numberISO 16589-5:2011(E)© ISO 2011
INTERNATIONAL STANDARD ISO16589-5Second edition2011-04-15Rotary shaft lip-type seals incorporating thermoplastic sealing elements — Part 5: Identification of visual imperfections Bagues d'étanchéité à lèvres pour arbres tournants incorporant des éléments d'étanchéité thermoplastiques — Partie 5: Identification des imperfections visuelles
oSIST ISO 16589-5:2014
©
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
[e-mail] Web
www.iso.org Published in Switzerland
ii © ISO 2011 – All rights reserved
oSIST ISO 16589-5:2014
oSIST ISO 16589-5:2014
oSIST ISO 16589-5:2014
oSIST ISO 16589-5:2014
oSIST ISO 16589-5:2014
INTERNATIONAL STANDARD ISO 16589-5:2011(E) © ISO 2011 – All rights reserved 1 Rotary shaft lip-type seals incorporating thermoplastic sealing elements —
...

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Bagues d'étanchéité à lèvres pour arbres tournants incorporant des éléments d'étanchéité thermoplastiques - Partie 5: Identification des imperfections visuellesRotary shaft lip-type seals incorporating thermoplastic sealing elements - Part 5: Identification of visual imperfections23.100.60Filters, seals and contamination of fluidsICS:Ta slovenski standard je istoveten z:ISO 16589-5:2011SIST ISO 16589-5:2014en,fr01-marec-2014SIST ISO 16589-5:2014SLOVENSKI
STANDARDSIST ISO 16589-5:20021DGRPHãþD

Reference numberISO 16589-5:2011(E)© ISO 2011
INTERNATIONAL STANDARD ISO16589-5Second edition2011-04-15Rotary shaft lip-type seals incorporating thermoplastic sealing elements — Part 5: Identification of visual imperfections Bagues d'étanchéité à lèvres pour arbres tournants incorporant des éléments d'étanchéité thermoplastiques — Partie 5: Identification des imperfections visuelles
©
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
[e-mail] Web
www.iso.org Published in Switzerland
ii © ISO 2011 – All rights reserved
INTERNATIONAL STANDARD ISO 16589-5:2011(E) © ISO 2011 – All rights reserved 1 Rotary shaft lip-type seals incorporating thermoplastic s
...

INTERNATIONAL ISO
STANDARD 16589-5
Second edition
2011-04-15
Rotary shaft lip-type seals incorporating
thermoplastic sealing elements —
Part 5:
Identification of visual imperfections
Bagues d'étanchéité à lèvres pour arbres tournants incorporant des
éléments d'étanchéité thermoplastiques —
Partie 5: Identification des imperfections visuelles

Reference number
©
ISO 2011
©  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 [e-mail]
Web www.iso.org
Published in Switzerland
ii © ISO 2011 – All rights reserved

Contents Page
Foreword .iv
Introduction.v
1 Scope.1
2 Normative references.1
3 Terms and definitions .1
4 Characteristic imperfections.1
4.1 Definition of sealing lip critical area.1
4.2 Type and name of imperfections .1
4.3 Visual imperfections on seals with additional components.2
4.3.1 Outer circumference portion.2
4.3.2 Protection lip.2
5 Identification statement (Reference to this part of ISO 16589).2
Bibliography.14

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 16589-5 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 16589-5:2001), 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

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.

INTERNATIONAL STANDARD ISO 16589-5:2011(E)

Rotary shaft lip-type seals incorporating thermoplastic sealing
elements —
Part 5:
Identification of visual imperfections
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 defines and classifies typical surface imperfections that could impair the function of the
seals, and is intended as a convenience for purchasers and manufacturers in their discussions concerning the
importance of these imperfections in different applications.
NOTE ISO 16589 is complementary
...