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1、BRITISH STANDARD BS ISO 9911:2006 Agricultural irrigation equipment Manually operated small plastics valves ICS 65.060.35 ? Licensed Copy: London South Bank University, London South Bank University, Tue Jan 30 01:34:32 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BS ISO 9911:2006 This British Standard
2、 was published under the authority of the Standards Policy and Strategy Committee on 29 December 2006 BSI 2006 ISBN 0 580 49770 4 National foreword This British Standard was published by BSI. It is the UK implementation of ISO 9911:2006. The UK participation in its preparation was entrusted to Techn
3、ical Committee AGE/30, Irrigation and drainage equipment. A list of organizations represented on AGE/30 can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance
4、with a British Standard cannot confer immunity from legal obligations. Amendments issued since publication Amd. No. DateComments Licensed Copy: London South Bank University, London South Bank University, Tue Jan 30 01:34:32 GMT+00:00 2007, Uncontrolled Copy, (c) BSI INTERNATIONAL STANDARD ISO 9911 S
5、econd edition 2006-11-15 Reference number ISO 9911:2006(E) Agricultural irrigation equipment Manually operated small plastics valves Matriel agricole dirrigation Petites vannes en matire plastique commandes manuellement BS ISO 9911:2006 Licensed Copy: London South Bank University, London South Bank
6、University, Tue Jan 30 01:34:32 GMT+00:00 2007, Uncontrolled Copy, (c) BSI ii Licensed Copy: London South Bank University, London South Bank University, Tue Jan 30 01:34:32 GMT+00:00 2007, Uncontrolled Copy, (c) BSI iii Contents Page 1Scope 1 2Normative references 1 3Terms and definitions 2 4Marking
7、 . 3 5Sampling and acceptance requirements . 4 6Technical characteristics 4 7Mechanical and functional tests 6 Annex A (normative) Resistance of valve and valve material to hydrostatic pressure . 10 Bibliography . 12 BS ISO 9911:2006 Licensed Copy: London South Bank University, London South Bank Uni
8、versity, Tue Jan 30 01:34:32 GMT+00:00 2007, Uncontrolled Copy, (c) BSI iv 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 t
9、echnical committees. Each member body interested 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 clos
10、ely with the International Electrotechnical 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. Draf
11、t International Standards adopted by the 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 docum
12、ent may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 9911 was prepared by Technical Committee ISO/TC 23, Tractors and machinery for agriculture and forestry, Subcommittee SC 18, Irrigation and drainage equipment and systems. Th
13、is second edition cancels and replaces the first edition (ISO 9911:1993), which has been technically revised. BS ISO 9911:2006 Licensed Copy: London South Bank University, London South Bank University, Tue Jan 30 01:34:32 GMT+00:00 2007, Uncontrolled Copy, (c) BSI 1 Agricultural irrigation equipment
14、 Manually operated small plastics valves 1Scope This International Standard specifies the general requirements and test methods for manually operated small plastics valves intended for operation in agricultural irrigation systems. It is applicable to manually operated plastics valves of nominal size
15、s DN 8 (1/4“) to DN 100 (4“). The valves are intended for installation in irrigation piping networks, using water at temperatures up to . Nominal pressures of the valves are as designated by the manufacturer. 2Normative references The following referenced documents are indispensable for the applicat
16、ion of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 7-1, Pipe threads where pressure-tight joints are made on the threads Part 1: Dimensions, tolerances and designati
17、on ISO 48:1994, Rubber, vulcanized or thermoplastic Determination of hardness (hardness between 10 IRHD and 100 IRHD) ISO 188:1998, Rubber, vulcanized or thermoplastic Accelerated ageing and heat resistance tests ISO 815, Rubber, vulcanized or thermoplastic Determination of compression set at ambien
18、t, elevated or low temperatures ISO 1167 (all parts), Thermoplastics pipes, fittings and assemblies for the conveyance of fluids Determination of the resistance to internal pressure ISO 2859-1:1999, Sampling procedures for inspection by attributes Part 1: Sampling schemes indexed by acceptance quali
19、ty limit (AQL) for lot-by-lot inspection ISO 5752, Metal valves for use in flanged pipe systems Face-to-face and centre-to-face dimensions ISO 7349, Thermoplastics valves Connection references ISO 7508, Unplasticized polyvinyl chloride (PVC-U) valves for pipes under pressure Basic dimensions Metric
20、series ISO 8233, Thermoplastics valves Torque Test method ISO 8242, Polypropylene (PP) valves for pipes under pressure Basic dimensions Metric series ISO 8659, Thermoplastics valves Fatigue strength Test method ISO 9393-1, Thermoplastics valves for industrial applications Pressure test methods and r
21、equirements Part 1: General 60 C BS ISO 9911:2006 Licensed Copy: London South Bank University, London South Bank University, Tue Jan 30 01:34:32 GMT+00:00 2007, Uncontrolled Copy, (c) BSI 2 ISO 9625, Mechanical joint fittings for use with polyethylene pressure pipes for irrigation purposes ISO 9644,
22、 Agricultural irrigation equipment Pressure losses in irrigation valves Test method 3Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 body main component of the valve which provides the fluid flow passageways and the body ends 3.2 seat part of t
23、he valve which provides the obturator seating surface NOTEIt can be either integral or a separate component. 3.3 dividing wall integral part of the valve body which separates the inlet and outlet ports of a valve, and on which the valve seat is formed 3.4 nominal pressure PN alphanumeric designation
24、 for reference purposes related to the mechanical strength of a valve NOTEIt usually corresponds to the service pressure in bar, with water at , for which the valve is designed (; ). 3.5 nominal size numerical designation used to refer to the size of a valve which is identical to the diameter of the
25、 pipe or pipes to which the valve is intended to be connected directly NOTEA single number designation is adequate if the inlet and outlet ports are the same size. 3.6 angle valve valve with a generally cylindrical body in which the body ends are in planes perpendicular to each other and having a st
26、em the axis of which is co-linear with the axis of one body end 3.7 ball valve valve in which a ball can be turned to move its port, or ports, relative to the ports in the valve body, to control the flow of water 3.8 diaphragm valve valve in which a flexible diaphragm constitutes the closing and reg
27、ulating mechanism to control the flow of fluid through the valve 3.9 globe valve valve with a generally cylindrical body in which the axes of the body ends are co-linear and in which the axis of the stem is perpendicular to the axes of the body ends 20 C 1 bar=0,1 MPa=105Pa 1 MPa=1 N/mm2 BS ISO 9911
28、:2006 Licensed Copy: London South Bank University, London South Bank University, Tue Jan 30 01:34:32 GMT+00:00 2007, Uncontrolled Copy, (c) BSI 3 3.10 oblique valve Y-globe valve valve in which the axes of the body ends are co-linear and in which the axis of the stem is oblique to the axes of the bo
29、dy ends 3.11 closing disc part of an obturator of any shape on which the disc face is formed and to which the disc facing ring, if used, is secured 3.12 obturator moving member in a valve that operates to close the valve and, where applicable, contains a washer or similar sealing device 3.13 disc fa
30、ce smooth face of the obturator in a valve which makes contact with the valve seat when the valve is closed 3.14 disc facing ring ring, of material different from the closing disc, secured to the disc and used to ensure water-tightness when a valve is closed 3.15 stem shaft component of an obturator
31、 by which the actuating thread is formed and by which control of the closing component is effected 3.16 closing torque torque exerted over the closing operation to achieve full tightness of the valve at nominal pressure 3.17 opening torque torque exerted initially to open the valve from fully closed
32、 or over the full opening operation at nominal pressure 3.18 shell test test intended to check the design strength of a valve body, under internal hydrostatic pressure 4Marking Each manually operated plastics valve that meets the requirements of this International Standard shall bear a readily visib
33、le, clear and durable marking, which shall give the particulars listed under a), b) and e) below. Particulars listed under c) and d) may be given on an attached label or on the packaging. a)Name of manufacturer or registered trademark. b)Nominal size of inlet and outlet ports: for direct slip-on typ
34、e connections to plastics pipe, the outside nominal diameter of the connecting pipe shall be given in millimetres; for threaded connections, the nominal thread size shall be given in accordance with ISO 7-1. c)Nominal pressure, in hundreds of kilopascals. d)Type of valve material: PE, PVC, PP, NP, e
35、tc. e)Direction of flow, if required, which should be shown on the valve body. BS ISO 9911:2006 Licensed Copy: London South Bank University, London South Bank University, Tue Jan 30 01:34:32 GMT+00:00 2007, Uncontrolled Copy, (c) BSI 4 5Sampling and acceptance requirements 5.1Type-tests Ensure that
36、the test laboratory representative takes the sample of test specimens at random from a total of at least 100 valves. Ensure that the number of test specimens used for each test is in accordance with Table 1. If the number of defective specimens in the sample is equal to or less than the acceptance n
37、umber given in Table 1, the lot shall be considered acceptable. If the number of defective specimens found in the test is greater than the acceptance number, the lot shall be rejected. All parts of the valve shall be of good workmanship, whole and smooth, and shall contain no holes. 5.2Acceptance te
38、sts When acceptance of manufacturing lots or of shipments of valves is required, conduct the sampling in accordance with ISO 2859-1:1999, based on AQL 2,5 and special inspection level S-4. Test all specimens in the sample, selected at random in accordance with ISO 2859-1:1999, Table II-A, for , as s
39、pecified in 7.5. The shipment or the lot complies with this International Standard if the number of defective specimens found in the test does not exceed the acceptance number according to ISO 2859-1. For the other tests, the number of test specimens shall be selected at random from the sample in ac
40、cordance with Table 1. The shipment or the lot complies with this International Standard if the number of defective specimens found in the other tests does not exceed the acceptance number specified in Table 1. 6Technical characteristics 6.1General All valve components that come into contact with wa
41、ter shall be suitable for use with water, fertilizers and chemicals commonly used in irrigation, including treated sewage water. The body material shall be opaque. Table 1 Required number of test specimens and acceptance number ClauseTest Number of test specimens Acceptance number 6Technical charact
42、eristics20 7.2.1Closing torque31 7.2.2Resistance to increased torque30 7.3Pressure loss20 7.4 Resistance of valve and valve material to internal hydrostatic pressure 40 7.5Seat and stem sealing test51 7.6Valve performance at increased hydraulic pressure20 7.7Endurance testing20 A.1Moulded plastics m
43、aterial of valve body Pressure test20 A.2Shell test30 1 h BS ISO 9911:2006 Licensed Copy: London South Bank University, London South Bank University, Tue Jan 30 01:34:32 GMT+00:00 2007, Uncontrolled Copy, (c) BSI 5 All parts of the valve shall be of good workmanship, whole and smooth, and shall cont
44、ain no holes, air bubbles, flash, projections or any other defects that could impair performance or cause injury. All parts of valves that are of the same size, type and model produced by the same manufacturer shall be interchangeable. The manufacturer shall supply written certification that the mat
45、erials used in the manufacture of the valve are in accordance with this International Standard. On request, the manufacturer shall supply any available information on the resistance of the valve to corrosive attack by fertilizers and chemicals used in agriculture. 6.2Dimensions According to the type
46、 of end connections of the valve, the basic dimensions of the valve shall be in accordance with the International Standards listed in Table 2. 6.3Connections to pipeline The connections of the valve to the pipeline shall be in accordance with ISO 7349 and Table 2. NOTEFlanged connections are not inc
47、luded. In valves with threaded ends intended for direct connection to the pipeline, the threads shall be in accordance with ISO 7-1. However, other threads are allowed, provided that a suitable adaptor is supplied with each threaded connection such that it complies with ISO 7-1. In valves intended f
48、or connection to polyethylene pipe by mechanical jointing fittings, the fittings shall be in accordance wit ISO 9625. 6.4Handwheel or handle The handwheel or handle shall be free from sharp projections, burrs or other defects that could cause injury. The handwheel or handle shall be securely connect
49、ed to the valve stem and shall be replaceable. 6.5Specific construction requirements for globe, oblique and angle valves 6.5.1Threaded valve stems or spindles The threads of the valve stems or spindles shall be as designed by the manufacturer, provided they are self- locking. The valve stem shall be of sufficient length to permit full closure of the valve when the handwheel or handle is mounted on the stem and the disc facing ring is removed. Table 2 Basic di