1、BRITISH STANDARDBS EN 15096:2008Devices to prevent pollution by backflow of potable water Hose Union anti-vacuum valves DN 15 to DN 25 inclusive Family H, type B and type D General technical specificationICS 91.140.60g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54
2、g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 15096:2008This British Standard was published under the authority of the Standards Policy and Strategy Committee on 29 August 2008 BSI 2008ISBN 978 0 580 54888 8National forewor
3、dThis British Standard is the UK implementation of EN 15096:2008.B/504, Water supply, to Subcommittee B/504/4, Backflow prevention.A list of organizations represented on this committee can be obtained on request to its secretary.The UK Committee would like to comment on the following: 1. According t
4、o Clause 6.2 it is obligatory that only certain markings should be visible on the devices in question. This would imply that the other markings listed are optional. The UK Committee would like to clarify that all the markings specified in Clause 6.2 are mandatory. 2. The use of differing inlet and o
5、utlet threads permitted by Clause 8.2 may not provide the expected security against disconnection of the device. It is the opinion of the UK Committee that other devices could still be attached to these threads using other methods (such as adaptors). 3. In the opinion of the UK Committee, the measur
6、ements given in Clause 10.1 a) and b) might not be met by using instruments with a permitted precision range of 2%. in Figure 8. The UK Committee recommends that the measurement in Clause 10 is followed. This publication does not purport to include all the necessary provisions of a contract. Users a
7、re responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations. Amendments/corrigenda issued since publicationDate Comments4. The measurement of h described in Clause 10.7.4.2 c) is defined differently The UK participation in its preparati
8、on was entrusted by Technical Committee EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 15096January 2008ICS 91.140.60English VersionDevices to prevent pollution by backflow of potable water - HoseUnion anti-vacuum valves - DN 15 to DN 25 inclusive Family H,type B and type D - General technical sp
9、ecificationDispositifs de protection contre la pollution par retour deleau potable - Soupape anti-vide dextrmit - DN 15 DN25 inclus famille H, type B et type D - Spcificationstechniques gnralesSicherungseinrichtungen zum Schutz des Trinkwassersgegen Verschmutzung durch Rckflieen - Rohrbelfter frSchl
10、auchanschlsse - DN 15 bis DN 25, Familie H, Typ Bund Typ D - Allgemeine technische BestimmungenThis European Standard was approved by CEN on 3 November 2007.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the s
11、tatus of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German).
12、A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic,
13、 Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALIS
14、ATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2008 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 15096:2008: EEN 15096:2008 (E) 2 Contents Page Foreword3 Introduction .4 1 Scope 5 2 Norma
15、tive references 5 3 Terms and definitions .6 4 Nominal size .6 5 Designation 6 6 Marking and technical product information7 7 Graphic symbol8 8 General design characteristics 8 9 Physico-chemical characteristics9 10 Characteristics and tests 10 11 Acoustic characteristics .20 Annex A (informative).2
16、2 BS EN 15096:2008EN 15096:2008 (E) 3 Foreword This document (EN 15096:2008) has been prepared by Technical Committee CEN/TC 164 “Water supply”, the secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standard, either by publication of an identical t
17、ext or by endorsement, at the latest by July 2008, and conflicting national standards shall be withdrawn at the latest by July 2008. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying
18、 any or all such patent rights. This standard has been developed in reference with EN 1717. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Repu
19、b-lic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 15096:2008EN 15096:2008 (E) 4 Introduction I
20、n respect of potential adverse effects on the quality of water intended for human consumption, caused by the product covered by this standard: a) this standard provides no information as to whether the product may be used without restriction in any of the Member States of the EU or EFTA; b) it shoul
21、d be noted that, while awaiting the adoption of verifiable European criteria, existing national regu-lations concerning the use and/or the characteristics of this product remain in force. BS EN 15096:2008EN 15096:2008 (E) 5 1 Scope This European Standard specifies: a) the field of application; b) th
22、e requirements of hose union anti vacuum valves; c) dimensional and physio-chemical properties, and properties of general hydraulic, mechanical and acous-tic design of hose union anti-vacuum valves of nominal sizes DN 15 up to and including DN 25; d) marking and technical product information. This s
23、tandard specifies the characteristics of hose union anti-vacuum valves of nominal size DN 15 up to and including DN 25 that are suitable for use in drinking water systems at pressures up to and including 1 MPa (10 bar) and temperatures up to and including 65 C and for 1 h at 90 C. HB protects agains
24、t back siphonage only and should be installed in vertical downward flow position. HB and HD anti-vacuum valves are for installation exclusively at the connecting point between stop valve and hose in vertical downward flow position. 2 Normative references The following referenced documents are indisp
25、ensable for the application of this document. For dated refer-ences, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 1717, Protection against pollution of potable water in water installations and general req
26、uirements of devices to prevent pollution by backflow EN 13959, Anti-pollution check valves - DN 6 to DN 250 inclusive family E, type A, B, C and D EN ISO 228-1, Pipe threads where pressure-tight joints are not made on the threads - Part 1: Dimensions, tolerances and designation (ISO 228-1:2000) EN
27、ISO 3822-1, Acoustics Laboratory tests on noise emission from appliances and equipment used in wa-ter supply installations Part 1: Method of measurement (ISO 3822-1:1999) EN ISO 3822-3, Acoustics Laboratory tests on noise emission from appliances and equipment used in water supply installations Part
28、 3: Mounting and operating conditions for in-line valves and appliances EN ISO 5167-1, Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full - Part 1: General principles and requirements (ISO 5167-1:2003) EN ISO 6509, Corrosion o
29、f metals and alloys Determination of dezincification resistance of brass (ISO 6509:1981) EN ISO 9227, Corrosion tests in artificial atmospheres - Salt spray tests (ISO 9227:2006) BS EN 15096:2008EN 15096:2008 (E) 6 3 Terms and definitions For the purposes of this document, the following terms and de
30、finitions apply. 3.1 hose union anti-vacuum valve HB valve equipped with air inlet ports, which are closed at zero flow and when water flows in the intended direction above atmospheric pressure NOTE The air inlets are opened if there is subatmospheric pressure at the water inlet and closed to be wat
31、ertight again when the supply lines are back to at least atmospheric pressure. 3.2 hose union anti-vacuum valve HD valve HB with integrated check valve EB located upstream (monoblock) NOTE For the purpose of this standard, “hose union anti-vacuum valve(s)“ are hereafter referred to as “device(s)“. 4
32、 Nominal size The nominal size of the devices (DN designated) shall correspond to the nominal size of the threaded connec-tion according to Table 1. Table 1 Thread size vs nominal size Thread size according to EN ISO 228-1 G G G 1 DN 15 20 25 5 Designation The device is designated by: a) name b) fam
33、ily c) type d) nominal size e) body material f) reference to this document (EN 15096) Example of designation Hose union anti-vacuum valve family H type B, DN 20, gun metal, EN 15096 BS EN 15096:2008EN 15096:2008 (E) 7 6 Marking and technical product information 6.1 General In the countries where the
34、 use of products made of dezincification resistant materials is not required, the de-zincification resistant products according to EN ISO 6509, as well as the products which do not contain zinc, are allowed to be marked . In countries where the use of dezincification resistant materials is re-quired
35、, the dezincification resistant products, as well as the products which do not contain zinc, shall be marked . 6.2 Marking The devices shall be permanently and visibly marked on the body or on a fixed identification plate. This information shall be on the outside of the device. The marking has to be
36、 indelible and obtained by mould-ing, engraving or similar procedures. The marking shall indicate a) name, manufacturers brand or logo; b) arrow indicating direction of flow; c) nominal size (DN); d) acoustic group; e) letters indicating family and type of device; f) nominal pressure (PN); g) confor
37、mance with this document (EN 15096); h) maximum operating temperature C. Marking a), b), c), and e) are obligatory. In case there is no marking for d), the device has to be considered as not classified acoustically. 6.3 Technical product information Each package and/or each batch and/or each catalog
38、ue of the supplier/manufacturer shall contain technical product information which shall be written in a commonly spoken language of the country in which the product is sold. It shall provide the following information: a) designation and purpose of the product; b) installation instructions; c) minimu
39、m installation height; d) (brand) name and address of supplier/manufacturer; e) instructions for maintenance, if any; f) spare part list, if any; g) nature of materials; h) terminal/inline use. BS EN 15096:2008EN 15096:2008 (E) 8 7 Graphic symbol In this document, the devices are expressed graphical
40、ly by: Figure 1 Hose union anti-vacuum valve symbol 8 General design characteristics 8.1 Design principle A typical design principle of HB and HD device is given in Figure 2 and Figure 3. Dimensions in millimetres Zero flow p1= p2= patmflow p1 p2 patmback siphonage p1p2= p3= patm flow p1 p2 p3 patm
41、back siphonage p13D h = 800 10 Key 1 needle type valves 2 valve 3 flow meter 4 pressure take off, according to EN ISO 5167-1 5 pressure gauge 6 test device a water supply h straight length of tube of the smallest size corresponding to the nominal size “DN“ of the test device Figure 5 Flow rate/press
42、ure loss testing equipment 10.5.2 Procedure The test equipment is shown in Figure 4. Record the flow rate/pressure loss of the device over the full range from 0 to the flow rate given in Table 3. Verify if the value obtained corresponds to the requirement. If necessary the pressure loss in the pipin
43、g length between the test specimen and the pressure tap should be accounted for. During the whole test, verify the leak tightness of the test specimen. BS EN 15096:2008EN 15096:2008 (E) 15 10.5.3 Requirement The flow rate at a pressure differential of 0,05 MPa (0,5 bar) shall not be less than the va
44、lues given in Table 3. No leakage out of the air inlets shall be observed throughout the whole test. In case the HB/HD is integrated in combined devices the flow rate requirements of those devices shall be applicable. Table 3 Nominal size vs minimum flow rates Nominal size DN 15 20 25 Minimum flow r
45、ate l/s 0,15 0,30 0,5 10.6 Opening pressure test (stage 4) 10.6.1 Test equipment Key 1, 3, 4 valve 2 pressure gauge 5 test device 6 transparent tube 7 scale 8 water reservoir a water supply b vacuum supply Figure 6 Opening pressure test equipment 10.6.2 Procedure The test equipment is shown in Figur
46、e 6. a) The check valve shall be blocked fully open or be removed (HD only); b) Install the test specimen according to the manufacturers instructions; c) Purge the system of air filling the container with water; BS EN 15096:2008EN 15096:2008 (E) 16 d) Close valve (1) and open valve (4); e) Observe t
47、he water column; f) Close valve (4); g) Open valve (3) slowly; h) Observe the water column in the tube. 10.6.3 Requirements a) After step (d), the water column in the transparent tube shall fall to container water level rapidly. b) After step (g), the water rise shall not exceed 100 mm. 10.7 Enduran
48、ce test (stage 5) 10.7.1 General For this test, three new test specimens are required that have not undergone the tests described above. In case of HD testing, the check valve has to be removed or blocked fully open. 10.7.2 Endurance test equipment Dimensions in millimetres Key 1 valve 2 solenoid va
49、lve 3 pressure gauge 4 test device 5 valve 6 transparent tube 7 water reservoir awater supply Figure 7 Endurance test rig for dynamic test Opening of solenoid valve (2) shall not create pressure peaks bigger than 1 MPa (10 bar). BS EN 15096:2008EN 15096:2008 (E) 17 10.7.3 Dynamic test (specimen 1) 10.7.3.1 Procedure; dynamic test The test equipment is shown in Figure 6. a) Set up: With solenoid valve (2) open adjust valve (1) and (5) together to achieve (0,5 0,05) MPa (5 0,5 bar) at pressure gauge (3) at the inlet
