SIST EN 13077:2004

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Naprave za varovanje pred onesnaženjem pitne vode zaradi povratnega toka - Prosti iztok s prelivom nekrožne oblike (neoviran) - Družina A, tip BSicherungseinrichtungen zum Schutz des Trinkwassers gegen Verschmutzung durch Rückfließen - Freier Auslauf mit nicht kreisförmigem Überlauf (uneingeschränkt) - Familie A, Typ BDispositifs de protection contre la pollution de l'eau potable par retour - Surverse avec trop-plein non circulaire (totale) - Famille A, type BDevices to prevent pollution by backflow of potable water - Air gap with non-circular overflow (unrestricted) - Family A, type B91.140.60Sistemi za oskrbo z vodoWater supply systems23.060.99Drugi ventiliOther valves13.060.20Pitna vodaDrinking waterICS:Ta slovenski standard je istoveten z:EN 13077:2003SIST EN 13077:2004en01-maj-2004SIST EN 13077:2004SLOVENSKI
STANDARD



SIST EN 13077:2004



EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 13077November 2003ICS 13.060.20; 23.060.99English versionDevices to prevent pollution by backflow of potable water - Airgap with non-circular overflow (unrestricted) - Family A, type BDispositifs de protection contre la pollution de l'eau potablepar retour - Surverse avec trop-plein non-circulaire (totale) -Famille A, type BSicherungseinrichtungen zum Schutz des Trinkwassersgegen Verschmutzung durch Rückfließen - Freier Auslaufmit nicht kreisförmigem Überlauf (uneingeschränkt) -Familie A, Typ BThis European Standard was approved by CEN on 1 September 2003.CEN members are bound to comply with the CEN/CENELEC Internal Regulations 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 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 translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and UnitedKingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2003 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 13077:2003 ESIST EN 13077:2004



EN 13077:2003 (E)2Contents pageForeword.3Introduction.41Scope.52Normative references.53Terms and definitions.54Designation.65Symbolization.66Materials.77Requirements.78Marking (not required for site constructed products).119Technical documents.12Annex A (informative)
Relationship between h and l for air gap Family A, type B with rectangularoverflow.13Annex B (informative)
Alternative constructions.14SIST EN 13077:2004



EN 13077:2003 (E)3ForewordThis document (EN 13077:2003) has been prepared by Technical Committee CEN/TC 164, "Water supply", thesecretariat 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 orby endorsement, at the latest by May 2004, and conflicting national standards shall be withdrawn at the latest byMay 2004.Annexes A and B are informative.According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal,Slovakia, Spain, Sweden, Switzerland and the United Kingdom.SIST EN 13077:2004



EN 13077:2003 (E)4IntroductionIn respect of potential adverse effects on the quality of water intended for human consumption, caused by theproduct covered by this standard:a) This standard provides no information as to whether the product may be used without restriction in any of theMember State of the EU or EFTA.b) It should be noted that, while awaiting the adoption of verifiable European criteria, existing national regulationsconcerning the use and/or the characteristics of this product remain in force.SIST EN 13077:2004



EN 13077:2003 (E)51 ScopeThis European Standard specifies the characteristics and the requirements of air gap with non-circular overflow(unrestricted) Family A, type B for nominal flow velocity not exceeding 3 m/s. Air gaps are devices for protection ofpotable water in water installations from pollution. This standard applies to air gaps in factory assembled productsand to constructed air gaps in situ, and defines the physico-chemical characteristics of materials of constructionused for the purpose and application to ensure compliance with this standard during normal working use.The annex A gives a relationship for rectangular overflow and the annex B is a note for alternative constructions.2 Normative referencesThis European Standard incorporates by dated or undated reference, provisions from other publications. Thesenormative references are cited at the appropriate places in the text, and the publications are listed hereafter. Fordated references, subsequent amendments to or revisions of any of these publications apply to this EuropeanStandard only when incorporated in it by amendment or revision. For undated references the latest edition of thepublication referred to applies (including amendments).EN 1717:2000, Protection against pollution of potable water in water installations and general requirements ofdevices to prevent pollution by backflow.3 Terms and definitionsFor the purposes of this European Standard, the terms and definitions given in EN 1717:2000, and the followingapply.3.1air gap with non-circular overflow (unrestricted) Family A, type B"AB" air gap is a permanent and vertical distance between the lowest point of the feed orifice and the critical waterlevel. It is strongly recommended that the overflow be non-circular in design and capable of draining the maximuminflow of water in a positive pressure fault condition.NOTESee Figure 1 for the design principle.Figure 1 – Design principle3.2spillover levellevel at which water will start to overflow the receiving vessel with all outlets closedSIST EN 13077:2004



EN 13077:2003 (E)63.3critical water levelphysical or piezometric level of the liquid reached in any part of the appliance 2 s after closing the water inletstarting from maximum level3.4dimension hheight between the spillover level and the critical levelNOTESee 7.4 for measurement and calculation. For example, see annex A.3.5maximum levelhighest water level H reached above the spillover level under positive pressure fault condi
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