EN 13077:2008

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 BDispositif de protection contre la pollution de l'eau potable par retour - Surverse avec trop-plein non-circulaire (to-tale) - 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 13077:2008SIST EN 13077:2009en,fr,de01-januar-2009SIST EN 13077:2009SLOVENSKI
STANDARDSIST EN 13077:20041DGRPHãþD

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 13077June 2008ICS 13.060.20; 23.060.99; 91.140.60Supersedes EN 13077:2003
English VersionDevices to prevent pollution by backflow of potable water - Airgap with non-circular overflow (unrestricted) - Family A - Type BDispositif de protection contre la pollution de l'eau potablepar retour - Surverse avec trop-plein non-circulaire (to-tale)- 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 29 May 2008.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 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 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, 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 STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2008 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 13077:2008: ESIST EN 13077:2009

Relationship between h and l for air gap Family A, Type B with rectangular overflow.13 Annex B (normative)
Alternative overflow arrangements.14 B.1 General.14 B.2 Horizontal overflow arrangement.14 B.3 Letterbox overflow extension arrangement.15
1 Scope This 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 of potable water in water installations from pollution. This European Standard applies to air gaps in factory-assembled products and to constructed air gaps in situ, and defines the physico-chemical characteristics of materials of construction used for the purpose and application to ensure compliance with this European Standard during normal working use. 2 Normative references The following referenced documents 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 1717:2000, Protection against pollution of potable water in water installations and general requirements of devices to prevent pollution by backflow 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 1717:2000 and the following apply. 3.1 air gap with non-circular overflow (unrestricted) Family A, Type B ("AB" air gap) permanent and vertical distance between the lowest point of the inlet orifice and the critical water level, and whose overflow is non-circular in design NOTE See Figure 1 for the design principle.
Figure 1 — Design principle 3.2 spillover level level at which water will start to overflow the receiving vessel with all outlets closed SIST EN 13077:2009
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