1、April 2008DEUTSCHE NORM English price group 12No part of this standard may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 91.140.60!$NB“1433161www
2、.din.deDDIN EN 15096Devices to prevent pollution by backflow of potable water English version of DIN EN 15096:2008-04Sicherungseinrichtungen zum Schutz des Trinkwassers gegen Verschmutzung durchRckflieen Rohrbelfter fr Schlauchanschlsse DN 15 bis DN 25, Familie H, Typ B und Typ D Allgemeine technisc
3、he BestimmungenEnglische Fassung DIN EN 15096:2008-04www.beuth.deDocument comprises 24 pagesHose union anti-vacuum valves DN 15 to DN 25 inclusive Family H, type B and type D technical specificationGeneralDIN EN 15096:2008-04 2 National foreword This standard has been prepared by Technical Committee
4、 CEN/TC 164 “Water supply” (Secretariat: AFNOR, France). The responsible German body involved in its preparation was the Normenausschuss Armaturen (Valves Standards Committee), Technical Committee NA 003-00-27 AA Armaturen fr die Trinkwasserinstallation in Gebuden. EUROPEAN STANDARD NORME EUROPENNE
5、EUROPISCHE NORM EN 15096 January 2008 ICS 91.140.60 English Version Devices 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 specification Dispositifs de protection contre la pollution par ret
6、our de leau potable - Soupape anti-vide dextrmit - DN 15 DN 25 inclus famille H, type B et type D - Spcifications techniques gnrales Sicherungseinrichtungen zum Schutz des Trinkwassers gegen Verschmutzung durch Rckflieen - Rohrbelfter fr Schlauchanschlsse - DN 15 bis DN 25, Familie H, Typ B und Typ
7、D - Allgemeine technische Bestimmungen This 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 European Standard the status of a national standard without any alteration. U
8、p-to-date lists and bibliographical references concerning such national standards 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). A version in any other language made by translation
9、under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Gree
10、ce, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Manageme
11、nt Centre: rue de Stassart, 36 B-1050 Brussels 2008 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 15096:2008: EEN 15096:2008 (E) 2 Contents Page Foreword3 Introduction .4 1 Scope 5 2 Normative references 5 3 Terms and definitions
12、 .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 DIN EN 15096:2008-04 Annex A (informative).22 EN 15096:2008 (E)
13、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 text or by endorsement, at the latest
14、 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 any or all such patent rights. This
15、 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 Repub-lic, Denmark, Estonia, Finland, Fr
16、ance, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. DIN EN 15096:2008-04 EN 15096:2008 (E) 4 Introduction In respect of potential adverse
17、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 should be noted that, while awaiting
18、 the adoption of verifiable European criteria, existing national regu-lations concerning the use and/or the characteristics of this product remain in force. DIN EN 15096:2008-04 EN 15096:2008 (E) 5 1 Scope This European Standard specifies: a) the field of application; b) the requirements of hose uni
19、on 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 standard specifies the char
20、acteristics 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 against back siphonage only and
21、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 indispensable for the applicatio
22、n 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 requirements of devices to pr
23、event 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 ISO 3822-1, Acoustics Labo
24、ratory 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 3: Mounting and operating
25、 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 of metals and alloys Determ
26、ination of dezincification resistance of brass (ISO 6509:1981) EN ISO 9227, Corrosion tests in artificial atmospheres - Salt spray tests (ISO 9227:2006) DIN EN 15096:2008-04 EN 15096:2008 (E) 6 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1
27、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 watertight again when th
28、e 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 Nominal size The nom
29、inal 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) family c) type d) nomina
30、l 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 DIN EN 15096:2008-04 EN 15096:2008 (E) 7 6 Marking and technical product information 6.1 General In the countries where the use of products
31、 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, the dezincific
32、ation 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 indelible and o
33、btained 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) conformance with this
34、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 catalogue of the suppli
35、er/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) minimum installation h
36、eight; 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. DIN EN 15096:2008-04 EN 15096:2008 (E) 8 7 Graphic symbol In this document, the devices are expressed graphically by: Figu
37、re 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 back siphon
38、age 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/pressure loss te
39、sting 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 piping length be
40、tween the test specimen and the pressure tap should be accounted for. During the whole test, verify the leak tightness of the test specimen. DIN EN 15096:2008-04 EN 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 values g
41、iven 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 rate l/
42、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 Figure 6. a
43、) 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; DIN EN 15096:2008-04 EN 15096:2008 (E) 16 d) Close valve (1) and open valve (4); e) Observe th
44、e 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 Enduranc
45、e 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 val
46、ve 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). DIN EN 15096:2008-04 EN 15096:2008 (E) 17 10.7.3 Dynamic test (specimen
47、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 of the device. b) Open (2) for (10 1) s. c) Close (2) and wait until the tra
48、nsparent sight tube is fully drained. d) One test cycle includes the sequence b) and c). Change over to be accomplished in not more than 1 s. e) Subject the valve to 5 000 cycles. For the first hour use water at 90 C and then continue with water at 65 C for the remainder of test. f) Repeat e) four t
49、imes with an idle period of 12 h between each 5 000 cycles. g) Perform a leak tightness test 10.4.4. 10.7.3.2 Requirements for dynamic test a) Throughout the test the valve shall fully drain down at each cycle. b) There shall be no leakage during the test. c) Any failure during the course of test is cause for rejection. 10.7.4 Endurance test; static, low pressure (specimen 2) 10.7.4.1 General The test equipment is shown in Figure 8. 10.7.4.2 Procedure, static test, low pressure (specimen 2) a) Install
