ISO-7714-2008.pdf
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1、 Reference number ISO 7714:2008(E) ISO 2008 INTERNATIONAL STANDARD ISO 7714 Fourth edition 2008-09-01 Agricultural irrigation equipment Volumetric valves General requirements and test methods Matriel agricole dirrigation Vannes volumtriques Exigences gnrales et mthodes dessai Copyright International
2、 Organization for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 10/25/2008 19:52:39 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 7714:2008(E) PDF disclaimer This PDF file may contain embedded typefaces. In accord
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4、ensing policy. The ISO Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printi
5、ng. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. COPYRIGHT PROTECTED DOCUMENT ISO 2008 All rights reserved. Unless otherwise
6、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 ISOs member body in the country of the requester. ISO copyright offi
7、ce Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2008 All rights reserved Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/591077
8、0001 Not for Resale, 10/25/2008 19:52:39 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 7714:2008(E) ISO 2008 All rights reserved iii Contents Page Foreword iv 1 Scope1 2 Normative references1 3 Terms and definitions .1 4 Classification .3 4.1 According to accuracy of
9、cumulative volume counter .3 4.2 According to method of operation as a system of volumetric valves.3 5 Markings.4 6 Technical requirements4 6.1 General .4 6.2 Threaded and flanged connections.5 6.3 Metrological requirements5 7 Mechanical, functional and accuracy tests 6 7.1 General .6 7.2 Accuracy o
10、f measuring devices 6 7.3 Sampling and minimum acceptance requirements .7 7.4 Test of resistance to hydrostatic pressure.7 7.5 Test of manual opening and closing.8 7.6 Tests of accuracy 8 7.7 Pressure loss.9 7.8 Endurance tests.10 8 Information to be supplied by the manufacturer11 Annex A (informati
11、ve) Quality of irrigation water12 Bibliography13 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 10/25/2008 19:52:39 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 7714:2008(E
12、) iv ISO 2008 All rights reserved 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 int
13、erested 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 Electrotechnic
14、al 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
15、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.
16、ISO shall not be held responsible for identifying any or all such patent rights. ISO 7714 was prepared by Technical Committee ISO/TC 23, Tractors and machinery for agriculture and forestry, Subcommittee SC 18, Irrigation and drainage equipment and systems. This fourth edition cancels and replaces th
17、e third edition (ISO 7714:2000), which has been technically revised. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 10/25/2008 19:52:39 MDTNo reproduction or networking permitted without license from IHS -
18、,-,- INTERNATIONAL STANDARD ISO 7714:2008(E) ISO 2008 All rights reserved 1 Agricultural irrigation equipment Volumetric valves General requirements and test methods 1 Scope This International Standard specifies general requirements and test methods for volumetric valves able to automatically delive
19、r preset quantities of water. It is applicable to valves actuated by pipeline pressure and flow alone, and which do not need any other, external, source of energy. NOTE Volumetric valves are typically required to operate correctly with different qualities of irrigation water at a variety of flow rat
20、es and at temperatures between 5 C and 50 C. 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 am
21、endments) applies. ISO 7-1, Pipe threads where pressure-tight joints are made on the threads Part 1: Dimensions, tolerances and designation ISO 9644: Agricultural irrigation equipment Pressure losses in irrigation valves Test method 3 Terms and definitions For the purposes of this document, the foll
22、owing terms and definitions apply. 3.1 volumetric valve valve capable of automatically delivering preset volumes of irrigation water at various flow rates, by measuring the volume of water flowing through the valve 3.2 serial volumetric valve volumetric valve designed to operate in a sequence of vol
23、umetric valves 3.2.1 single outlet serial volumetric valve serial volumetric valve with one inlet and one outlet, intended for connection in parallel in a system of volumetric valves designed to be opened by means of a hydraulic command when preset to the open position and which, on closing after de
24、livering a preset volume of water, transmits a hydraulic command to the next volumetric valve in the system to bring it into operation 3.2.2 single outlet “skip over” serial volumetric valve serial volumetric valve with one inlet and one outlet, intended for connection in parallel in a system of vol
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