1、BSI Standards Publication BS ISO 9635-2:2014 Agricultural irrigation equipment Irrigation valves Part 2: Isolating valvesBS ISO 9635-2:2014 BRITISH STANDARD National foreword This British Standard is the UK implementation of ISO 9635-2:2014. It supersedes BS ISO 9635-2:2006 which is withdrawn. The U
2、K 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 contrac
3、t. Users are responsible for its correct application. The British Standards Institution 2014. Published by BSI Standards Limited 2014 ISBN 978 0 580 80729 9 ICS 65.060.35 Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was published under the a
4、uthority of the Standards Policy and Strategy Committee on 30 November 2014. Amendments issued since publication Date Text affectedBS ISO 9635-2:2014 ISO 2014 Agricultural irrigation equipment Irrigation valves Part 2: Isolating valves Matriel agricole dirrigation Vannes dirrigation Partie 2: Vannes
5、 disolation INTERNATIONAL STANDARD ISO 9635-2 Second edition 2014-11-15 Reference number ISO 9635-2:2014(E)BS ISO 9635-2:2014ISO 9635-2:2014(E)ii ISO 2014 All rights reserved COPYRIGHT PROTECTED DOCUMENT ISO 2014 All rights reserved. Unless otherwise specified, no part of this publication may be rep
6、roduced 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 request
7、er. 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 9635-2:2014ISO 9635-2:2014(E)Contents Page Foreword iv 1 Scope . 1 2 Normative references 1 3 T erms and definitions . 1 4 De
8、sign requirements 2 5 Performance requirements . 2 5.1 General . 2 5.2 Mechanical strength . 2 5.3 Watertightness and airtightness 3 5.4 Hydraulic characteristics . 5 5.5 Resistance to chemicals and fertilizers 5 5.6 Endurance . 5 6 Conformity assessment . 6 6.1 General . 6 6.2 Type tests . 6 6.3 Co
9、ntrol of production process and quality system 6 7 Marking 6 8 Packaging . 6 Annex A (normative) Test method for resistance of valves to operating loads 8 Annex B (normative) Torque requirements for gate valves to be operated by ring key and bar 9 Annex C (normative) Test method for operation of val
10、ves .10 Annex D (normative) Test method for endurance of valves 11 Annex E (normative) Method for sizing operating element 12 Bibliography .15 ISO 2014 All rights reserved iiiBS ISO 9635-2:2014ISO 9635-2:2014(E) Foreword ISO (the International Organization for Standardization) is a worldwide federat
11、ion 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 represented on that committe
12、e. 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 this document and t
13、hose 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 Directives, Part 2
14、 (see 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 development of the
15、document will be in the Introduction and/or on the ISO list of patent declarations received (see 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 specific term
16、s 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 machinery
17、for agriculture and forestry, Subcommittee SC 18, Irrigation and drainage equipment and systems. This second edition cancels and replaces the first edition (ISO 9635-2:2006), which has been technically revised. ISO 9635 consists of the following parts, under the general title Agricultural irrigation
18、 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 9635-2:2014Agricultural irrigation equipment Irrigation valves Part 2: Isolating valves 1 Scope This part of ISO 963
19、5 specifies construction and performance requirements and test methods for isolating 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 applic
20、able to isolating irrigation valves of DN 8 in 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 normativel
21、y referenced 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 9635-1:2014, Agricultural irrigation equipment Irrigation valve
22、s Part 1: General requirements ISO 9644, Agricultural irrigation equipment Pressure losses in irrigation valves Test method 3 T erms a nd definiti ons For the purposes of this document, the terms and definitions given in ISO 9635-1:2014 and the following apply. 3.1 clear way valve valve designed to
23、have an unobstructed flow path which allows the passage of a theoretical sphere with a diameter which is not less than the inside diameter of the body end port SOURCE: EN 736-3 3.2 f lo w c o e f f ic ie nt K V proportionality factor equal to the flow rate, in cubic metres per hour, of water at a te
24、mperature between 5 C to 50 C, passing through the valve and causing a loss of static head of 1 bar Note 1 to entry: V , where Q is the flow rate in cubic metres per hour (m 3 /h), and p is the pressure drop across the valve, in bar or kilopond/kilogram-force per square centimetre (kp/cm 2 , kgf/cm
25、2 ). Note 2 to entry: 1 bar = 0,1 MPa = 105 Pa; 1 MPa = 1 N/mm 2 . Note 3 to entry: Adapted from EN 736-3. INTERNATIONAL ST ANDARD ISO 9635-2:2014(E) ISO 2014 All rights reserved 1BS ISO 9635-2:2014ISO 9635-2:2014(E) 3.3 full bore valve valve with a seat diameter of not less than 90 % of the interna
26、l diameter of the body end port SOURCE: EN 736-3 3.4 isolating valve valve intended for use only in the fully closed or fully open position SOURCE: EN 736-1 4 Design requirements Isolating valves shall be designed in accordance with the requirements given in Clause 4 of ISO 9635-1:2014. 5 Performanc
27、e requirements 5.1 General Perform all tests on the valve as it was delivered to the test facility. 5.2 Mechanical strength 5.2.1 Resistance to internal pressure of shell and all pressure-containing components Carry out testing in accordance with ISO 9635-1:2014, 5.2.1. Test results shall comply wit
28、h the requirements of ISO 9635-1:2014, 5.2.1. 5.2.2 Resistance of obturator to differential pressure Carry out testing in accordance with ISO 9635-1:2014, 5.2.2. Test results shall comply with the requirements of ISO 9635-1:2014, 5.2.2. Except for valves to be used for a single f low direction, perf
29、orm the test successively in each f low direction. 5.2.3 Resistance of valve to bending Carry out testing in accordance with ISO 9635-1:2014, 5.2.3, applying a bending moment, M, during the test appropriate to the DN value of the valve in accordance with Table 1. Test results shall comply with the r
30、equirements of ISO 9635-1:2014, 5.2.3. Table 1 Bending moments DN Bending moment M N m 8 610 10 615 20 640 25 670 NOTE For plastic-bodied valves, the applied bending moment should be equal to the bending moment exerted by a 6 m long plastic tube of the same diameter (DN).2 ISO 2014 All rights reserv
31、edBS ISO 9635-2:2014ISO 9635-2:2014(E) DN Bending moment M N m 32 730 40 825 50 1 050 65 1 400 80 1 500 100 2 200 125 3 200 150 4 800 200 7 200 250 11 000 300 15 000 350 19 000 400 24 000 450 28 000 500 33 000 NOTE For plastic-bodied valves, the applied bending moment should be equal to the bending
32、moment exerted by a 6 m long plastic tube of the same diameter (DN). 5.2.4 Resistance of valves to operating loads Test results shall comply with the requirements of ISO 9635-1:2014, 5.2.4. In order to verify this requirement, test the valve in accordance with Annex A, with the application of a clos
33、ing torque and an opening torque equal to the minimum strength torque (mST), following which it shall satisfy the requirements of the operating tests in accordance with 5.3.3, and the seat tightness tests in accordance with 5.3.2.1 and 5.3.2.2. The minimum strength torque shall be equal to twice the
34、 maximum operating torque given in 5.3.3. In testing gate valves as specified in 5.3.3 c), apply a minimum strength torque (mST) as set out in Annex A equal to 5 the maximum operating torque (MOT). In the case of valves as specified in 5.3.3 d), the test is applicable only when there is an additiona
35、l manual operating element. 5.3 Watertightness and airtightness 5.3.1 Watertightness and airtightness of shell and all pressure-containing components 5.3.1.1 Internal pressure Conduct testing in accordance with ISO 9635-1:2014, 5.3.1.1. Test results shall comply with the requirements of ISO 9635-1:2
36、014, 5.3.1.1. 5.3.1.2 External pressure Conduct testing in accordance with ISO 9635-1:2014, 5.3.1.2. Test results shall comply with the requirements of ISO 9635-1:2014, 5.3.1.2.Table 1 (continued) ISO 2014 All rights reserved 3BS ISO 9635-2:2014ISO 9635-2:2014(E) 5.3.2 Seat tightness 5.3.2.1 Seat ti
37、ghtness at high differential pressure Conduct testing in accordance with ISO 9635-1:2014, 5.3.2.1. After closing the valve by application of the maximum operating torque (see 5.3.3), the leakage rate shall not exceed rate A for resilient seated valves and shall not exceed rate B for metallic-seated
38、valves. Maintain the test pressure for 10 min. Except for valves to be used in a single f low direction, perform the test successively in each f low direction. 5.3.2.2 Seat tightness at low differential pressure Conduct testing in accordance with ISO 9635-1:2014, 5.3.2.2 After closing the valve by a
39、pplication of the maximum operating torque (see 5.3.3), the leakage rate shall not exceed rate A for resilient seated valves and shall not exceed rate B for metallic seated valves. Maintain the test pressure for 10 min. Except for valves to be used in a single f low direction, perform the test succe
40、ssively in each f low direction. 5.3.3 Maximum operating torque (MOT) for operation and watertightness and airtightness In order to verify this requirement, test the isolating valve as set out in Annex C. The measured torque shall not exceed the MOT as specified in a) to d) below. a) Valves delivere
41、d with their operating element1) In the case of a hand wheel, use Formula (1): (1) NOTE This is expressed in newton metres (N m). where F is the maximum operating manual force (F refers to operating the valve, F max , to seating and unseating the valve, see Annex E), expressed in newtons (N); D is t
42、he diameter of the hand wheel, in metres (m).2) In the case of a lever, use Formula (2): (2) NOTE This is expressed in newton metres (N m). where F is the maximum operating manual force (F refers to operating the valve, F max , to seating and unseating the valve, see Annex E), expressed in newtons (
43、N); L is the length of the lever, in metres (m). b) Valves delivered without operating element and intended to be operated by T-shaped key4 ISO 2014 All rights reservedBS ISO 9635-2:2014ISO 9635-2:2014(E)1) For butterfly valves, use Formula (3): (3)2) For gate valves, use Formula (4): (4) NOTE This
44、is expressed in newton metres (N m).3) For other types of valves, use Formula (5): (5) c) Gate valves delivered without operating element and intended to be operated by ring key and bar See Annex B. d) Valves operated electrically, hydraulically, or pneumatically 5.3.4 Watertightness and airtightnes
45、s of gearboxes to external pressure Conduct testing in accordance with ISO 9635-1:2014, 5.3.1.2. Test results shall comply with the requirements of ISO 9635-1:2014, 5.3.1.2. 5.4 Hydraulic characteristics Test results shall comply with ISO 9635-1:2014, 5.4. The characteristic given by the manufacture
46、r shall be the flow coefficient, K V . It is recommended that the manufacturer show the head loss of valves in the form of a table or graph. When measured in accordance with ISO 9644, K Vresulting from the head loss curve shall be within 5 % of the value declared by the manufacturer. 5.5 Resistance
47、to chemicals and fertilizers Conduct testing in accordance with ISO 9635-1:2014, 5.5. Test results shall comply with the requirements of ISO 9635-1:2014, 5.5. 5.6 Endurance The endurance of isolating valves is evaluated as follows: a) Subject the isolating valve to an endurance test as set out in An
48、nex D at a differential pressure equal to the allowable operating pressure across the obturator. b) Test the isolating valve in accordance with 5.3.1, 5.3.2, and 5.3.3, with the application of a torque not exceeding either 1,2 the maximum operating torque (with the same leakage rate), or the maximum
49、 operating torque (with leakage allowed to increase by one rate level). ISO 2014 All rights reserved 5BS ISO 9635-2:2014ISO 9635-2:2014(E) See ISO 9635-1:2014, Table G.2, for leakage rates. Complete the following number of opening/closing cycles during the endurance test: for manually-operated valves, 250 cycles; for electrically-operated, hydraulically-
