ISO INTERNATIONAL STANDARD 9635-1 Second edition 2014-11-15 Agricultural irrigation equipment - Irrigation valves - Part 1: General requirements Matériel agricole d'irrigation - Vannes d'irrigation - Partie 1: Exigences générales Reference number ISO 9635-1:2014(E) ISO International Organization for Standardization e-Zhejang Institute of Standardization 5956617 @IS02014 mitted without license from IHS IS0 9635-1:2014(E) COPYRIGHT PROTECTED DOCUMENT @ISO2014 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested 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 [email protected] Web www.iso.org Published in Switzerland DrganizationforStandardization Not for Resale, 2015/5/13 08:52:07 No reproduction or networking permited without license from IHS IS0 9635-1:2014(E) Contents Page Foreword ..iv 1 Scope .1 2 Normative references ..1 3 Terms and definitions 4 Design requirements. .3 4.1 Materials. .3 4.2 DN. .3 4.3 Pressures 3 4.4 Temperatures .4 4.5 Design of shell and obturator 4 4.6 End types and interchangeability ..4 4.7 Operating direction 4 4.8 Maximum water velocity .5 4.9 Valve parts. .5 4.10 Internalcorrosionandageingresistance .5 4.11 External corrosion and ageing resistance .5 4.12 Repairs and maintenance ..5 5 Performance requirements .5 5.1 .5 General. 5.2 Mechanical strength 6 5.3 Watertightness .6 5.4 Hydraulic characteristics 7 5.5 Resistance to chemicals and fertilizers. ..7 5.6 Endurance test .1 6 Conformity assessment .8 6.1 General. 8 6.2 Type tests. .8 6.3 Control of production process and quality system ..8 7 Marking. ..8 8 Packaging .9 Annex A (normative) Test method for resistance to internal pressure of shell and all pressure-containing components.. ..10 Annex B (normative) Test method for resistance of obturator to differential pressure. ..11 Annex C (normative) Test method for resistance of valves to bending ..13 Annex D (normative) Minimal test method for watertightness to external pressure of shell and all pressure-containing components ..15 Annex E (normative) Test method for resistance to chemicals and fertilizers ..16 Annex F (normative) Test method for water or air tightness of valve body ..17 Annex G (normative) Test method for seat tightness ..19 Bibliography 23 ii icensee=Zhejiang Institute of Standardization 5956617 ed without license from IHS