ISO 19973-4:2014
(Main)Pneumatic fluid power — Assessment of component reliability by testing — Part 4: Pressure regulators
Pneumatic fluid power — Assessment of component reliability by testing — Part 4: Pressure regulators
ISO 19973-4:2014 provides test procedures for assessing the reliability of pneumatic pressure regulators by testing and the methods of reporting the results of testing. General test conditions and the calculation method are provided in ISO 19973-1. The methods specified in ISO 19973-1 apply to the first failure, as obtained with the three-points moving average (3PMA) method, without repairs, but excluding outliers. ISO 19973-4:2014 applies to manually adjustable and remote-piloted pressure regulators, both relieving and non-relieving. It does not apply to pressure regulators that have a permanent bleed. ISO 19973-4:2014 also specifies test equipment and failure criteria (threshold levels) for tests to assess the reliability of pneumatic pressure regulators.
Transmissions pneumatiques — Évaluation par essais de la fiabilité des composants — Partie 4: Régulateurs de pression
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INTERNATIONAL ISO
STANDARD 19973-4
Second edition
2014-03-01
Pneumatic fluid power — Assessment
of component reliability by testing —
Part 4:
Pressure regulators
Transmissions pneumatiques — Évaluation par essais de la fiabilité
des composants —
Partie 4: Régulateurs de pression
Reference number
ISO 19973-4:2014(E)
©
ISO 2014
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ISO 19973-4:2014(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2014
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
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Published in Switzerland
ii © ISO 2014 – All rights reserved
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ISO 19973-4:2014(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Symbols and units . 2
5 Test equipment. 2
5.1 Basic test equipment . 2
5.2 Directional control valve . 4
5.3 Volumes . 4
6 Test conditions . 4
6.1 General test conditions . 4
6.2 Inlet and regulated pressures . 5
7 Test procedure . 5
7.1 Timing of checks and measurements . 5
7.2 Type and scope of checks and measurements . 5
7.3 Endurance test . 5
8 Failure criteria and threshold levels . 7
8.1 General .
...
DRAFT INTERNATIONAL STANDARD ISO/DIS 19973-4
ISO/TC 131 Secretariat: ANSI
Voting begins on Voting terminates on
2012-10-03 2013-01-03
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION МЕЖДУНАРОДНАЯ ОРГАНИЗАЦИЯ ПО СТАНДАРТИЗАЦИИ ORGANISATION INTERNATIONALE DE NORMALISATION
Pneumatic fluid power — Assessment of component reliability
by testing —
Part 4:
Pressure regulators
Transmissions pneumatiques — Évaluation par essais de la fiabilité des composants —
Partie 4: Régulateurs de pression
[Revision of first edition (ISO 19973-4:1997)]
ICS 23.100.01
To expedite distribution, this document is circulated as received from the committee
secretariat. ISO Central Secretariat work of editing and text composition will be undertaken at
publication stage.
Pour accélérer la distribution, le présent document est distribué tel qu'il est parvenu du
secrétariat du comité. Le travail de rédaction et de composition de texte sera effectué au
Secrétariat central de l'ISO au stade de publication.
THIS DOCUMENT IS A DRAFT CIRCULATED FOR COMMENT AND APPROVAL. IT IS THEREFORE SUBJECT TO CHANGE AND MAY NOT BE
REFERRED TO AS AN INTERNATIONAL STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS BEING ACCEPTABLE FOR INDUSTRIAL, TECHNOLOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON OCCASION HAVE TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL TO BECOME
STANDARDS TO WHICH REFERENCE MAY BE MADE IN NATIONAL REGULATIONS.
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT, WITH THEIR COMMENTS, NOTIFICATION OF ANY RELEVANT PATENT RIGHTS OF WHICH
THEY ARE AWARE AND TO PROVIDE SUPPORTING DOCUMENTATION.
© International Organization for Standardization, 2012
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ISO/DIS 19973-4
Copyright notice
This ISO document is a Draft International Standard and is copyright-protected by ISO. Except as permitted
under the applicable laws of the user’s country, neither this ISO draft nor any extract from it may be
reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic,
photocopying, recording or otherwise, without prior written permission being secured.
Requests for permission to reproduce should be addressed to 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
Reproduction may be subject to royalty payments or a licensing agreement.
Violators may be prosecuted.
ii © ISO 2012 – All rights reserved
---------------------- Page: 2 ----------------------
ISO/DIS 19973-4
Contents Page
Foreword . iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Symbols and units . 2
5 Test equipment . 2
5.1 Basic test equipment . 2
5.2 Directional control valve . 3
5.3 Connecting piping and volumes . 3
6 Test conditions . 4
6.1 General test conditions. 4
6.2 Inlet and outlet pressures . 4
7 Test procedure . 4
7.1 Timing of checks and measurements .
...
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