Luftung von Gebauden -GeratedesLuftverteilungssystems-AerodynamischePrufungenvonDrossel-undAbsperrelementen;EnglischeFassungEN1751:2024 Englische Ubersetzung von DIN EN 1751:2024-10
Ventilationdesbatiments-Bouches d'air-Essais aerodynamiques desregistresetclapets;Version anglaiseEN1751:2024 Traduction anglaise de DIN EN1751:2024-10
Nationalforeword
This document(EN1751:2024)has been prepared by Technical Committee CEN/TC156“Ventilation forbuildings"(Secretariat: BSI United Kingdom).
Theresponsible German bodyinvolved in its preparation was DIN-NormenausschussHeiz-undRaumluftechniksowiederenSicherheit(DINStandardsCommitteeHeatingandVentilationTechnology andtheir Safety) Working Committee NA041-02-52AA“Components (Mirror mittee CEN/TC156/WG3and 4)".
For current information on this document please go to DIN's website ( and search for thedocument number in question.
Amendments
This standard differsfrom DIN EN 1751:2014-06asfollows:
a)AnnexChasbeenupdated;
1)formulae forthecalculation of classification levels and an improved graphhave been added to closedbladeleakage;2)formulae for classification based on ductwork leakage classes in EN16798-3:2017 Table19 usinga
b)normative references have been updated;
c)thedocumenthasbeeneditoriallyrevised.
Previouseditions
DIN EN 1751: 1999-01 2014-06
EN 1751
Supersedes EN1751:2014
EnglishVersion
Ventilationforbuildings- Airterminal devices- Aerodynamictestingofdamperandvalves
Ventilation desbatiments-Bouches d'air-Essais aerodynamiques des registres et clapets
Luftung von Gebauden-Gerate des Luftverteilungssystems-Aerodynamische Pruifungen von Drossel- undAbsperrelementen
This European Standard was approved by CEN on 15 April 2024.
CENmembers are bound to ply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving thisEuropean Standard the status ofa national standard without any alteration.Up-to-date lists and bibliographicalreferencesmember.
translation under the responsibility of a CEN memberinto its own language and notified to theCEN-CENELEC ManagementCentre has the same status as the official versions.
CENmembers are thenational standardsbodiesfAustriaelgiumBulgaria roatiaCyruszechRublic Denmark stonia FinlandranmanyenarylandandtalyatviaiuaniaugaltthlandayPolandortugal ublicforthMaceoniamaniarbilovakiaoveniaain wenwitzlandrkiyaUnited Kingdom.
CEN-CENELECManagement Centre:Rue dela Science 23 B-1040Brussels
Contents
Page
Europeanforeword. 31 Scope... 42 Normativereferences. 43 Terms and definitions. Terms definitions symbolsandsuffixes.. 53.1 53.2 Symbols.. 53.3 Suffixes... 64 Instrumentation.. 64.1 Airflowratemeasurement... .64.2 Pressuremeasurement.... 74.3 Temperaturemeasurement. 75 Leakage test.. 85.1 Genera.... .85.2 Damperandvalveleakage... 85.3 Casingleakage... .86 Flowrateandpressure tests... 96.1 Ducted method....6.2 Chambermethod. 106.2.1 General.. 106.2.2 Size relationship... 106.2.3 Test.. .106.3 Calculations and report... 11AnnexA(informative)Mechanicaltestingofdampersandvalves. ...18A.1 Genera... ..18A.2 Instrumentation:Torquemeasurement. .18A.3 Pressuretesttodeterminelimitingvalueforstructuralstability.... 18A.4 Torqueteststodeterminethetorquerequiredtooperatethedamperorvalveandthelimitingvaluetoavoidstructuraldamage..... .19AnnexB(informative)Thermaltransmittancethroughdampersandvalves. ..1B.1 Genera.... ...1B.2 Thermal losstestusingasubstitutionmethod. ..1AnnexC(normative)Classificationofadamperorvalveleakage. ..4C.1 Genera... ..4C.2Leakage through closed blade(s). ..24C.3 Casing..kg.. ..26AnnexD（informative)Effectofductconfigurationonpressurelosscoefficient..... .28D.1 Genera.... ...28D.2 Applicationofcorrectionfactor.. ...9Bibliography ...30
Europeanforeword
This document(EN 1751:2024)has been prepared by Technical Committee CEN/TC 156"Air terminaldevices"N1 the secretariat of which is held by BSI.
identical text orbyendorsement atthelatestbyNovember2024 andconflictingnationalstandardsshallbewithdrawnatthelatestbyNovember2024.
Attentionisdrawn tothepossibilitythatsomeof theelementsofthisdocumentmaybethesubjectofpatent rights.CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 1751:2014.
In parisonwith the previous edition EN1751:2014 thefollowingtechnical modificationshavebeenmade:
-AnnexCClassification ofa damper orvalveleakage;
Closed bladeleakage now hasthe addition of formulaefor the calculation of classification levelsandanimprovedgraph;Caseleakagenowhasformulaeforclassificationwhicharebasedonductworkleakageclasses
Anyfeedback andquestionsonthisdocument should bedirectedtotheusers'nationalstandardsbody.Apletelistingofthesebodiescanbefound ontheCENwebsite.
According tothe CEN-CENELEC Internal Regulations the nationalstandards organisations of theItaly Latvia Lithuania Luxembourg Malta Netherlands Norway Poland Portugal Republicof NorthMacedonia Romania Serbia Slovakia Slovenia Spain Sweden Switzerland Turkiye and theUnitedKingdom.
