1、BS EN 14506:2005ICS 13.060.20NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDDevices to prevent pollution by backflow of potable water Automatic diverter Family H, type C.Incorporating Corrigendum October 2009This British Standard was published under the authori
2、ty of the Standards Policy and Strategy Committee on 31 March 2009 BSI 2009ISBN 978 0 580 69362 5Amendments/corrigenda issued since publicationDate CommentsBS EN 14506:2005National forewordThis British Standard is the UK implementation of EN 14506:2005. The UK participation in its preparation was en
3、trusted to TechnicalCommittee B/504/4, Backflow Prevention.A list of organizations represented on this committee can be obtained onrequest to its secretary.The UK technical committee B/504 would like to draw attention to the procedure in 10.4.4.2 in which a low pressure is applied to the device whil
4、st in flow to bath mode. In the opinion of the committee this is unlikely to demonstrate the ability of the device to remain leak tight at the shower outlet when a high bath flow is drawn. Therefore, the committee is of the opinion that instead of a pressure being applied, a flow rate of 0,75 would
5、be a more effective method of testing.This publication does not purport to include all the necessary provisionsof a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunityfrom legal obligations.31 October 2009 Correction to national fore
6、wordBS EN 14506:2005EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 14506May 2005ICS 13.060.20; 23.060.01English versionDevices to prevent pollution by backflow of potable water -Automatic diverter - Family H, type CDispositifs de protection contre la pollution de leau potablepar retour - Inverseu
7、r retour automatique - Famille H, typeCSicherungseinrichtungen zum Schutz des Trinkwassersgegen Verschmutzung durch Rckflieen - AutomatischerUmsteller - Familie H, Typ CThis European Standard was approved by CEN on 24 December 2004.CEN members are bound to comply with the CEN/CENELEC Internal Regula
8、tions which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This Europe
9、an Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national
10、standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN CO
11、MMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2005 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14506:2005: EEN 14506:2005 (E) 2 Conte
12、nts Page Foreword3 Introduction .4 1 Scope 5 2 Normative references 5 3 Terms and definitions .6 4 Nominal size and pressure ranges 6 5 Designation 7 6 Marking and technical documents.7 7 Symbolization.8 8 General design characteristics 9 9 Physico-chemical characteristics9 10 Characteristics and te
13、sts 10 11 Acoustic characteristics .21 Annex A (normative) Sampling and test sequence22 BS EN 14506:2005EN 14506:2005 (E) 3 Foreword This document (EN 14506:2005) has been prepared by Technical Committee CEN/TC 164 “Water supply”, the secretariat of which is held by AFNOR. This European Standard sha
14、ll be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by November 2005, and conflicting national standards shall be withdrawn at the latest by November 2005. This document has been developed with reference to EN 1717 “Protection ag
15、ainst pollution of potable water in water installations and general requirements of devices to prevent pollution by backflow“. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Be
16、lgium, Cyprus, Czech Republic, Den-mark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxem-bourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. BS EN 14506:2005EN 14506:2005 (E) 4 I
17、ntroduction In respect of potential adverse effects on the quality of water intended for human consumption, caused by the product covered by this document: a) this document provides no information as to whether the product may be used without restriction in any of the Member States of the EU or EFTA
18、; b) it should be noted that, while awaiting the adoption of verifiable European criteria, existing national regulations concerning the use and/or the characteristics of this product remain in force. BS EN 14506:2005EN 14506:2005 (E) 5 1 Scope This document specifies: a) field of application; b) req
19、uirements for automatic diverters; c) dimensional and the physico-chemical properties and the properties of general hydraulic, mechanical and acoustic design of automatic diverters; d) test method and requirements for verifying these properties. For sanitary tapware (see Clause 2) with in-tegrated d
20、evices, the automatic diverter is only considered to be a backflow protection device if it has passed the requirements of this document and additionally those of the applicable product standard for the draw off tap or mixing valve; e) marking and presentation; f) acoustics. This document specifies t
21、he characteristics of automatic diverters suitable for use in drinking water systems at pressures up to 1 MPa (10 bar) and temperatures up to 65 C and for 1 h at 90 C. They are intended only for installation with no downstream closing device. This document is applicable to the product type indicated
22、 as follows: i) integrated in spout (outlet); ii) integrated in the mixing body; iii) non-integrated (part of a set) above the maximum water level. This document is not applicable to the product type non-integrated below the maximum water level. 2 Normative references The following referenced docume
23、nts are indispensable 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 200, Sanitary tapware Single taps and combination taps (PN 10) - General tec
24、hnical specification EN 248, Sanitary tapware General specification for electrodeposited coatings of Ni-Cr EN 806-1:2000, Specifications for installations inside buildings conveying water for human consumption Part 1: General EN 817, Sanitary tapware Mechanical mixers (PN 10) General technical speci
25、fications EN 1111, Sanitary tapware Thermostatic mixing valves (PN 10) General technical specification EN 1112, Shower outlets for (PN 10) sanitary tapware EN 1113, Showers hoses for (PN 10) sanitary tapware EN 1286, Sanitary tapware Low pressure mechanical mixing valves General technical specificat
26、ion BS EN 14506:2005EN 14506:2005 (E) 6 EN 1287, Sanitary tapware Low pressure thermostatic mixing valves General technical specifications EN 1717:2000, Protection against pollution of potable water in water installations and general requirements of devices to prevent pollution by backflow EN ISO 22
27、8-1, 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 Laboratory tests on noise emission from appliances and equipment used in water supply installations Part 1: Method of measurement (ISO 38
28、22-1:1999) EN ISO 3822-2, Acoustics Laboratory tests on noise emission from appliances and equipment used in water supply installations Part 2: Mounting and operating conditions for draw-off taps and mixing valves (ISO 3822-2:1995) EN ISO 6509, Corrosion of metals and alloys Determination of dezinci
29、fication resistance of brass (ISO 6509:1981) ISO 7-1, Pipe threads where pressure-tight joints are made on the threads Part 1: Dimensions, tolerances and designation ISO 9227, Corrosion tests in artificial atmospheres Salt spray tests 3 Terms and definitions For the purposes of this document, the te
30、rms and definitions given in EN 1717:2000 and EN 806-1:2000 and the following apply. automatic diverter part of sanitary tapware capable of switching the water supply from the shower hose outlet (secondary outlet) to the bath outlet (primary outlet) in the event of insufficient supply pressure. It i
31、ncorporates the following characteristics: a) means of manually diverting flow to a hose outlet and of maintaining diversion as long as a positive supply pressure is maintained; b) automatic closure of the hose outlet with anticipation and return to air gap discharge when the supply pressure falls b
32、elow a prescribed minimum; c) sufficient mechanical loading to maintain closure of the hose outlet in the event of a negative supply pres-sure. For the purpose of this document “automatic diverter HC “is hereafter referred to as “device(s)“ 4 Nominal size and pressure ranges The nominal size of non-
33、integrated devices (DN) shall correspond to the denomination of the thread according to Table 1. Nominal size is not applicable to integrated devices. For specifications of threads please see 8.2. BS EN 14506:2005EN 14506:2005 (E) 7 Table 1 Nominal size vs thread size Thread size DN 15 20 The device
34、 shall be suitable for the pressure ranges specified. 5 Designation The device is designated by: a) name; b) reference to this document (EN 14506); c) family, type; d) pressure range (HP or LP); e) acoustic group. EXAMPLE for a designation Automatic diverter, EN 14506, family H, type C, HP, I 6 Mark
35、ing and technical documents 6.1 Marking 6.1.1 General In countries where the use of products made of dezincification resistant materials is not required, the dezincification resistant products according to EN ISO 6509 as well as the products which do not contain zinc, may be marked “DR“. In countrie
36、s where the use of dezincification resistant materials is required, the dezincification resistant products, as well as the products which do not contain zinc, shall be marked “DR“. 6.1.2 Marking for integrated devices An additional marking required for sanitary tapware shall be indicated by letters
37、indicating family and type of device. The marking shall be visible and permanent, i.e. moulded, engraved, etched or obtained by similar procedures. 6.1.3 Marking for non integrated devices The marking shall indicate: a) name, manufacturers brand or logo; b) arrow indicating normal direction of flow;
38、 c) nominal size (DN); d) acoustic group; e) letters indicating family and type of device. BS EN 14506:2005EN 14506:2005 (E) 8 Marking a), b), c), and e) are obligatory. In case there is no marking for d), the device shall be considered as not classified acoustically. 6.2 Technical documents Each pa
39、ckage and/or each batch and/or each catalogue 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 produ
40、ct; b) installation instructions; c) minimum installation height; d) (brand) name and address of the supplier/manufacturer; e) instructions for maintenance, if any; f) spare part list, if any. For integrated devices, the technical documents for the sanitary fitting, shall state whether the automatic
41、 diverter is of an anti pollution type, or whether the hose outlet of the sanitary tapware is protected by some other means against backflow as required by EN 1717, or, whether additional means for backflow protection has to be installed. 7 Symbolization The graphic representation of the device is a
42、s follows (see Figure 1): Figure 1 Graphic symbol BS EN 14506:2005EN 14506:2005 (E) 9 8 General design characteristics 8.1 Design principle A typical design principle of HC device is given in Figure 2. Key 1 Inlet 2 Bath 3 Shower Figure 2 Design principle of HC device 8.2 Connections For devices sup
43、plied as part of a set the connection shall be as specified in the sanitary tapware standards EN 200; EN 817; EN 1111; EN 1112; EN 1113; EN 1286; or EN 1287. For non integrated devices the following standards shall be applicable: ISO 7-1 or EN ISO 228-1. 9 Physico-chemical characteristics 9.1 Materi
44、als The materials and the coatings used, liable to come normally or accidentally in contact with potable water, shall satisfy the EU regulations concerning water quality, The materials and the coatings shall be: a) corrosion resistant in accordance with ISO 9227; b) prone to the least scaling possib
45、le; c) in conformity with the associated standards and regulations; BS EN 14506:2005EN 14506:2005 (E) 10 d) compatible among themselves and with: water distributed; fluids or matter liable to come into contact with them; products normally used for desinfection operations of the network: potassium pe
46、rmanganate and so-dium hypochlorite. 9.2 Nature of materials The choice of materials is left to the discretion of the manufacturer. a) Copper-zinc alloys containing more than 10 % zinc are subject to denzincification when submitted to water capable of dezincification. In countries where the use of p
47、roducts made of dezincification resistant materials is required, the products shall guarantee a dezincification depth less than 200 um in any direction, they shall be tested in accordance with EN ISO 6509 and shall be marked in compliance with the indication in Clause 6. b) Neither the materials nor
48、 the coatings used shall, by normal or accidental contact with drinking water, cause any risk of affecting or modifying the water up to a temperature of 90 C. The suitability of the water for human consumption is defined by national regulations. c) The manufacturer shall state in his technical and s
49、ales literature the nature of the materials and the coat-ings selected. d) The materials, and in particular copper alloys, for which recommendations or standards exist shall comply with the relevant recommendations or standards. 10 Characteristics and tests 10.1 General 10.1.1 Examples shown in the figures are for guidance only. Laboratory equipment shall be designed to ensure that the devices can be tested in accordance with the specified requirements. Twin inlet devices, unless otherwise stated, will be fed f
