1、BSI Standards Publication BS ISO 9635-1:2014 Agricultural irrigation equipment Irrigation valves Part 1: General requirementsBS ISO 9635-1:2014 BRITISH STANDARD National foreword This British Standard is the UK implementation of ISO 9635-1:2014. It supersedes BS ISO 9635-1:2006 which is withdrawn. T
2、he UK participation in its preparation was entrusted to Technical Committee AGE/30, Irrigation and drainage equipment. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a con
3、tract. Users are responsible for its correct application. The British Standards Institution 2014. Published by BSI Standards Limited 2014 ISBN 978 0 580 80728 2 ICS 65.060.35 Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was published under t
4、he authority of the Standards Policy and Strategy Committee on 30 November 2014. Amendments issued since publication Date Text affectedBS ISO 9635-1:2014 ISO 2014 Agricultural irrigation equipment Irrigation valves Part 1: General requirements Matriel agricole dirrigation Vannes dirrigation Partie 1
5、: Exigences gnrales INTERNATIONAL STANDARD ISO 9635-1 Second edition 2014-11-15 Reference number ISO 9635-1:2014(E)BS ISO 9635-1:2014ISO 9635-1:2014(E)ii ISO 2014 All rights reserved COPYRIGHT PROTECTED DOCUMENT ISO 2014 All rights reserved. Unless otherwise specified, no part of this publication ma
6、y 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 ISOs member body in the country of the
7、 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 copyrightiso.org Web www.iso.org Published in SwitzerlandBS ISO 9635-1:2014ISO 9635-1:2014(E)Contents Page Foreword iv 1 Scope . 1 2 Normative references 1 3 T erms and definitions
8、. 2 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 Internal corrosion and ageing resistance 5 4.
9、11 External corrosion and ageing resistance . 5 4.12 Repairs and maintenance 5 5 Performance requirements . 5 5.1 General . 5 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 7 6 Conformity assessment
10、. 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
11、 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 fer
12、tilizers .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 ISO 2014 All rights reserved iiiBS ISO 9635-1:2014ISO 9635-1:2014(E) Foreword ISO (the International Organization for Standardization) is
13、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 represent
14、ed 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. The procedures used to develop
15、this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC
16、 Directives, Part 2 (www.iso.org/directives). 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. Details of any patent rights identified during the deve
17、lopment of the document will be in the Introduction and/or on the ISO list of patent declarations received (www.iso.org/patents). Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement. For an explanation on the meaning of ISO sp
18、ecific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT), see the following URL: Foreword Supplementary information. The committee responsible for this document is ISO/TC 23, Tractors and
19、 machinery for agriculture and forestry, Subcommittee SC 18, Irrigation and drainage equipment and systems. This second edition cancels and replaces the first edition (ISO 9635-1:2006), which has been technically revised. ISO 9635 consists of the following parts, under the general title Agricultural
20、 irrigation equipment Irrigation valves: Part 1: General requirements Part 2: Isolating valves Part 3: Check valves Part 4: Air valves Part 5: Control valvesiv ISO 2014 All rights reservedBS ISO 9635-1:2014Agricultural irrigation equipment Irrigation valves Part 1: General requirements 1 Scope This
21、part of ISO 9635 specifies construction and performance requirements and test methods for valves, intended for operation in irrigation systems with water at temperatures not exceeding 60 C, which can contain fertilizers and other chemicals of the types and concentrations used in agriculture. It is a
22、pplicable to irrigation valves of 8 mm diameter or greater, designed to operate in the fully open and fully closed positions, but which can also operate for extended time periods in any intermediate position. 2 Normative references The following documents, in whole or in part, are normatively refere
23、nced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 4633, Rubber seals Joint rings for water supply, drainage and sewerage
24、pipelines Specification for materials ISO 5209, General purpose industrial valves Marking ISO 5752, Metal valves for use in flanged pipe systems Face-to-face and centre-to-face dimensions ISO 6708:1995, Pipework components Definition and selection of DN (nominal size) ISO 7005-1, Pipe flanges Part 1
25、: Steel flanges for industrial and general service piping systems ISO 7005-2, Metallic flanges Part 2: Cast iron flanges ISO 7005-3, Metallic flanges Part 3: Copper alloy and composite flanges ISO 9227, Corrosion tests in artificial atmospheres Salt spray tests ISO 9635-2:2014, Agricultural irrigati
26、on equipment Irrigation valves Part 2: Isolating valves ISO 9635-5:2014, Agricultural irrigation equipment Irrigation valves Part 5: Control valves ISO 9644, Agricultural irrigation equipment Pressure losses in irrigation valves Test method ISO 9911:2006, Agricultural irrigation equipment Manually o
27、perated small plastics valves ISO 9080, Plastics piping and ducting systems Determination of the long-term hydrostatic strength of thermoplastics materials in pipe form by extrapolation EN 681-1, Elastomeric seals Materials requirements for pipe joint seals used in water and drainage applications Pa
28、rt 1: Vulcanized rubber EN 12627, Industrial valves Butt welding ends for steel valves EN 12982, Industrial valves End-to-end and centre-to-end dimensions for butt welding end valves INTERNATIONAL ST ANDARD ISO 9635-1:2014(E) ISO 2014 All rights reserved 1BS ISO 9635-1:2014ISO 9635-1:2014(E) 3 T erm
29、s a nd definiti ons For the purposes of this document, the following terms and definitions apply. 3.1 maximum operating torque MOT fixed upper limit for the torque which, when applied at the shaft, operates the valve and ensures compliance with the required leakage rate 3.2 minimum strength torque m
30、ST fixed lower limit for the torque which, when applied at the shaft, with the obturator either totally open or totally closed, causes no alteration to the functional capability of the valve 3.3 shaft component of an obturator on which the actuating thread is formed and by which control of the closi
31、ng component is effected 3.4 type test test to prove that the design of a valve meets the general and specific performance requirements of the valve 3.5 operating mechanism mechanism which translates the motion of the operating device to the motion of the obturator SOURCE: EN 736-2 3.6 operating dev
32、ice manual or power-operated device used to operate the non-pressurized valve SOURCE: EN 736-2 3.7 operating element component of the operating device by which the mechanical power is introduced SOURCE: EN 736-2 3.8 nominal diameter DN parameter used for reference purposes to indicate the size of a
33、valve abbreviated to DN and usually followed by a dimensionless round number which is loosely related to the effective dimensions of the bore or external diameter of the end connections of the valve Note 1 to entry: It is expressed in millimetres. Note 2 to entry: Adapted from ISO 6708:1995, definit
34、ion 2.1. 3.9 nominal pressure PN parameter, used for reference purposes in describing a valve, abbreviated to PN and usually followed by a dimensionless round number which is loosely related to the maximum allowable working pressure of the valve Note 1 to entry: PN is expressed in bars.2 ISO 2014 Al
35、l rights reservedBS ISO 9635-1:2014ISO 9635-1:2014(E) Note 2 to entry: 1 bar = 0,1 MPa = 105 Pa; 1 MPa = 1 N/mm 2 . Note 3 to entry: Adapted from ISO 7268:1983/Amd, 1:1984. 3.10 allowable operating pressure AOP maximum hydrostatic pressure that a valve is capable of withstanding in continuous servic
36、e SOURCE: EN 805 3.11 maximum allowable pressure MAP maximum pressure occurring from time to time, including average surge pressures, that a valve is capable of withstanding in service SOURCE: EN 805 3.12 allowable site test pressure ASTP maximum hydrostatic pressure that a newly-installed valve is
37、capable of withstanding for a relatively short duration, in order to ensure integrity and tightness of the pipeline SOURCE: EN 805 3.13 obturator moving member in a valve that operates to close the valve and, where applicable, contains a washer or similar sealing device 4 Design requirements 4.1 Mat
38、erials 4.1.1 Components and coating materials Select components and coating materials from those conforming to the relevant standards, where standards exist. Ensure that they meet the requirements of 4.9, 4.10, and 4.11, either alone or in combination with coating materials. 4.1.2 Elastomers Ensure
39、that elastomers comply with ISO 4633 or EN 681-1 and 4.10 of this part of ISO 9635. 4.2 DN Select DN values from the preferred values given in ISO 6708, with an upper limit of DN 2 000. Confirm with the manufacturer whether a DN value is from the DN/ID series or from the DN/OD series. 4.3 Pressures
40、Valves intended for irrigation systems come under the nominal pressure (PN) designation and shall be designed in such a way that their characteristic pressures, allowable operating pressure, maximum allowable pressure, and allowable site test pressure are as set out in Table 1 for the corresponding
41、PN (see also 4.4). ISO 2014 All rights reserved 3BS ISO 9635-1:2014ISO 9635-1:2014(E) Table 1 Valve pressures PN Pressure bar AOP a MAP a ASTP b 6 6 8 12 10 10 12 17 16 16 20 25 25 25 30 35 aApplicable to valves in all positions, from fully closed to fully open. bApplicable only to valves not in the
42、 closed position. Table 1 gives minimum values of allowable site test pressure. The manufacturers catalogue can indicate higher values on the condition that the requirements of this part of ISO 9635 have been verified with these higher values. In this case, allowable site test pressure shall not be
43、less than 1,5 maximum allowable pressure or (maximum allowable pressure +5 bar). 4.4 Temperatures It is considered that, with the exception of the test where work is done with small volumes of water, it is possible to control the water temperature; the hydraulic characteristics tests and the enduran
44、ce tests shall be carried out at a water temperature of 4 C to 35 C. 4.5 Design of shell and obturator Valves shall be designed to ensure a safety factor against short-term and long-term shell and obturator rupture, taking account of allowable operating pressure, maximum allowable pressure, and allo
45、wable site test pressure according to 4.3. This requirement shall not preclude any of the performance requirements given in Clause 5. The design shall be carried out using one of the following methods. A calculation method using the tensile strength of the material (as defined in the relevant materi
46、al standards) divided by a safety factor. For materials with time-dependent mechanical behaviour (such as plastic materials), the tensile strength shall be the 20 C 50-year extrapolated minimum strength obtained from pressure tests on injection moulded or extruded pipes subjected to constant hydrost
47、atic pressure at various temperatures and for different lengths of time to comply with ISO 9080. An experimental method, relying on pressure tests on valve shells subjected to a constant hydrostatic pressure equal to maximum allowable pressure times a safety factor. For materials with time-dependent
48、 mechanical behaviour (such as plastic materials), the test pressure shall be further multiplied by a coefficient specific to each material in order to take into account its 50-year extrapolated minimum strength and the slope of its strength regression line. 4.6 End types and interchangeability Valv
49、es can be designed with various types of end connections adapted to specific pipe systems. The connections shall fulfil the standardized requirements of the relevant pipe systems. In order to ensure interchangeability of flanged valves, their face-to-face or centre-to-face dimensions shall comply with ISO 5752 and their flanges with ISO 7005-1, ISO 7005-2, or ISO 7005-3 (depending on the flange material). In the case of steel valves with welded ends, the end-to-en
