ISO 23551-10:2016

DRAFT INTERNATIONAL STANDARD
ISO/DIS 23551-10
ISO/TC 161 Secretariat: DIN
Voting begins on: Voting terminates on:
2015-10-22 2016-01-22
Safety and control devices for gas burners and gas-burning
appliances — Particular requirements —
Part 10:
Vent valves
Titre manque
ICS:
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
Reference number
NATIONAL REGULATIONS.
ISO/DIS 23551-10:2015(E)
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. ISO 2015

ISO/DIS 23551-10:2015(E) ISO/DIS 23551-10

Contents Page
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Classification . 3
4.1 Classes of controls . 3
4.2 Groups of controls . 3
5 Test conditions . 3
6 Construction . 3
6.1 General . 3
6.2 Construction requirements . 3
6.2.1 Appearance . 3
6.2.1.1 Design . 3
6.2.2 Holes . 3
6.2.3 Breather holes . 3
6.2.4 Screwed fastenings . 3
6.2.5 Jointing . 3
6.2.6 Moving parts . 3
6.2.7 Sealing caps . 4
6.2.8 Dismantling and reassembling for servicing and/or adjustment . 4
6.2.9 Auxiliary channels . 4
6.2.101 Open position indicator switch . 4
6.2.102 Controls assembled to a valve . 4
6.3 Materials . 4
6.3.1 General material requirements . 4
6.3.2 Housing . 4
6.3.3 Springs . 4
6.3.4 Resistance to corrosion and surface protection . 4
6.3.5 Impregnation . 4
6.3.6 Seals for glands for moving parts . 5
6.3.101 Closure member . 5
6.4 Gas connections . 5
6.4.1 Making connections . 5
6.4.2 Connection sizes . 5
6.4.3 Threads . 5
6.4.4 Union joints . 5
6.4.5 Flanges . 5
6.4.6 Compression fittings . 5
6.4.7 Nipples for pressure tests . 5
6.4.8 Strainers . 5
6.101 Pneumatic and hydraulic actuating mechanisms . 5
7 Performance . 5
© ISO 2015, Published in Switzerland
7.1 General . 5
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
7.2 Leak-tightness . 6
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
7.2.1 Criteria . 6
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
7.2.2 Test for leak-tightness . 6
the requester.
7.3 Torsion and bending . 6
ISO copyright office
7.4 Rated flow rate . 6
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland 7.5 Durability . 6
Tel. +41 22 749 01 11
7.6 Functional requirements. 6
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2015 – All rights reserved

ISO/DIS 23551-10
Contents Page
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Classification . 3
4.1 Classes of controls . 3
4.2 Groups of controls . 3
5 Test conditions . 3
6 Construction . 3
6.1 General . 3
6.2 Construction requirements . 3
6.2.1 Appearance . 3
6.2.1.1 Design . 3
6.2.2 Holes . 3
6.2.3 Breather holes . 3
6.2.4 Screwed fastenings . 3
6.2.5 Jointing . 3
6.2.6 Moving parts . 3
6.2.7 Sealing caps . 4
6.2.8 Dismantling and reassembling for servicing and/or adjustment . 4
6.2.9 Auxiliary channels . 4
6.2.101 Open position indicator switch . 4
6.2.102 Controls assembled to a valve . 4
6.3 Materials . 4
6.3.1 General material requirements . 4
6.3.2 Housing . 4
6.3.3 Springs . 4
6.3.4 Resistance to corrosion and surface protection . 4
6.3.5 Impregnation . 4
6.3.6 Seals for glands for moving parts . 5
6.3.101 Closure member . 5
6.4 Gas connections . 5
6.4.1 Making connections . 5
6.4.2 Connection sizes . 5
6.4.3 Threads . 5
6.4.4 Union joints .
...