EN 1751:2024
(Main)Ventilation for buildings - Air terminal devices - Aerodynamic testing of damper and valves
Ventilation for buildings - Air terminal devices - Aerodynamic testing of damper and valves
This document specifies methods for the testing and rating of dampers and valves used in air distribution systems with pressure differences up to 2 000 Pa.
The tests incorporated in this document will address:
- leakage past a closed damper or valve (for classification, see Annex C);
- casing leakage (for classification, see Annex C);
- flow rate/pressure requirement characteristics;
- torque: (see Annex A);
- thermal transmittance: (see Annex B).
The tests specified above are applicable to the following:
- measurement of leakage past a closed damper or valve;
- measurement of casing leakage;
- determination of flow rate and pressure requirements;
- measurement of torque characteristics (see Annex A);
- measurement of thermal transfer characteristics to determine insulation properties (see Annex B).
This document does not apply to the acoustic testing of dampers and valves.
NOTE Certain aspects of the dynamic performance of dampers and/or valves are dependent upon the air distribution system to which they are connected and are, therefore, difficult to measure in isolation. Such considerations have led to the omission of these aspects of the dynamic performance measurements from this document. Also, in common with other air distribution components, the results from tests carried out in accordance with this document might not be directly applicable if the damper or valve is situated in an area of non-uniform flow.
Lüftung von Gebäuden - Geräte des Luftverteilungssystems - Aerodynamische Prüfungen von Drossel- und Absperrelementen
Dieses Dokument legt Verfahren zur Prüfung und Bewertung von Drossel- und Absperrelementen fest, die in Luftverteilungssystemen mit Differenzdrücken bis zu 2 000 Pa verwendet werden.
Die in diesem Dokument enthaltenen Prüfungen berücksichtigen:
Leckage bei einem geschlossenen Drossel- bzw. Absperrelement (Klassifizierung siehe Anhang C);
Gehäuseleckage (Klassifizierung siehe Anhang C);
typische Anforderungen an Volumenstrom/Druck;
Drehmoment (siehe Anhang A);
Wärmedurchgangskoeffizient (siehe Anhang B).
Die vorstehend festgelegten Prüfungen sind für Folgendes anwendbar:
Messung der Leckage bei einem geschlossenen Drossel- bzw. Absperrelement;
Messung der Gehäuseleckage;
Bestimmung der Anforderungen an Volumenstrom und Druck;
Messung des Drehmomentverlaufs (siehe Anhang A);
Messung der Wärmeübertragung zur Bestimmung der Wärmedämmungseigenschaften (siehe Anhang B).
Dieses Dokument ist nicht für die akustische Prüfung von Drossel- und Absperrelementen anwendbar.
ANMERKUNG Bestimmte Aspekte der dynamischen Leistung von Drossel- bzw. Absperrelementen sind abhängig vom Luftverteilungssystem, in das sie eingebunden sind, weshalb es schwierig ist, sie getrennt zu messen. Solche Erwägungen haben dazu geführt, dass diese Aspekte der Messung der dynamischen Leistung nicht in das vorliegende Dokument aufgenommen wurden. Wie auch bei anderen Luftverteilungskomponenten sind die Ergebnisse von Prüfungen nach diesem Dokument möglicherweise nicht direkt anwendbar, wenn das Drossel- bzw. Absperrelement in einem Bereich ungleichmäßiger Strömung angeordnet ist.
Ventilation des bâtiments - Bouches d'air - Essais aérodynamiques des registres et clapets
Le présent document spécifie des méthodes pour l'essai et la classification des registres et des clapets utilisés dans les systèmes de distribution d'air avec des différences de pressions jusqu'à 2 000 Pa.
Les essais faisant partie du présent document portent sur:
- la fuite à travers un registre ou un clapet fermé (pour la classification, voir l’Annexe C);
- l'étanchéité de l'enveloppe (pour la classification, voir l’Annexe C);
- les caractéristiques des exigences débit/pression;
- le couple (voir l’Annexe A);
- la transmission thermique (voir l’Annexe B).
Les essais spécifiés ci-dessus sont applicables au suivants:
- mesurage de la fuite à travers un registre ou un clapet fermé;
- mesurage de l'étanchéité de l'enveloppe;
- détermination des exigences de débit et pression;
- mesurage des caractéristiques de couple (voir l’Annexe A);
- mesurage des caractéristiques de transfert thermique afin de déterminer les propriétés d'isolation (voir l’Annexe B).
Le présent document ne s'applique pas aux essais acoustiques des registres et des clapets.
NOTE Certains aspects des performances dynamiques des registres et/ou des clapets sont dépendants du système de distribution d'air auquel ils sont raccordés et sont, par conséquent, difficiles à mesurer isolément. De telles considérations ont amené à omettre ces aspects de mesurage de la performance dynamique du présent document. De plus, comme pour d'autres composants de distribution d'air, les résultats d'essai effectués conformément au présent document peuvent ne pas être directement applicables si le registre ou le clapet est placé dans une zone d'écoulement non uniforme.
Prezračevanje stavb - Naprave za vtok in odtok zraka - Aerodinamično preskušanje dušilnikov in loput
Ta dokument določa metode za preskušanje in ocenjevanje dušilnikov in loput, ki se uporabljajo v sistemih za dovod zraka z razlikami v tlaku do 2000 Pa.
Preskusi v tem dokumentu obravnavajo:
– puščanje skozi zaprt dušilnik ali loputo (glej dodatek C za klasifikacijo);
– puščanje ohišja (glej dodatek C za klasifikacijo);
– stopnjo pretoka in zahteve glede tlaka;
– navor: (glej dodatek A);
– toplotno prehodnost: (glej dodatek B).
Akustični preskusi dušilnikov in loput niso zajeti v tem dokumentu. Zgoraj navedeni preskusi se uporabljajo za:
– merjenje puščanja skozi zaprt dušilnik ali loputo;
– merjenje puščanja ohišja;
– določevanje stopnje pretoka in zahtev glede tlaka;
– merjenje navora (glej dodatek A);
– merjenje toplotne prehodnosti za določevanje izolacijskih lastnosti (glej dodatek B).
OPOMBA: Nekateri vidiki dinamičnega delovanja dušilnikov in/ali loput so odvisni od sistema za porazdelitev zraka, s katerim so le-ti povezani, zato jih je težko meriti ločeno. Te ugotovitve so privedle do opustitve takšnih vidikov meritev dinamičnega delovanja v tem dokumentu. Kot pri drugih komponentah za porazdelitev zraka tudi rezultatov preskusov, izvedenih v skladu s tem dokumentom, morda ne bo mogoče neposredno uporabiti, če je dušilnik ali loputa nameščena na območju neenakomernega pretoka.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-julij-2024
Nadomešča:
SIST EN 1751:2014
Prezračevanje stavb - Naprave za vtok in odtok zraka - Aerodinamično
preskušanje dušilnikov in loput
Ventilation for buildings - Air terminal devices - Aerodynamic testing of damper and
valves
Lüftung von Gebäuden - Geräte des Luftverteilungssystems - Aerodynamische
Prüfungen von Drossel- und Absperrelementen
Ventilation des bâtiments - Bouches d'air - Essais aérodynamiques des registres et
clapets
Ta slovenski standard je istoveten z: EN 1751:2024
ICS:
91.140.30 Prezračevalni in klimatski Ventilation and air-
sistemi conditioning systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 1751
EUROPEAN STANDARD
NORME EUROPÉENNE
May 2024
EUROPÄISCHE NORM
ICS 91.140.30 Supersedes EN 1751:2014
English Version
Ventilation for buildings - Air terminal devices -
Aerodynamic testing of damper and valves
Ventilation des bâtiments - Bouches d'air - Essais Lüftung von Gebäuden - Geräte des
aérodynamiques des registres et clapets Luftverteilungssystems - Aerodynamische Prüfungen
von Drossel- und Absperrelementen
This European Standard was approved by CEN on 15 April 2024.
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. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC 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 under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 1751:2024 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms, definitions, symbols and suffixes . 5
3.1 Terms and definitions . 5
3.2 Symbols . 5
3.3 Suffixes . 6
4 Instrumentation . 6
4.1 Air flow rate measurement . 6
4.2 Pressure measurement. 7
4.3 Temperature measurement . 7
5 Leakage tests . 8
5.1 General. 8
5.2 Damper and valve leakage. 8
5.3 Casing leakage . 8
6 Flow rate and pressure tests. 9
6.1 Ducted method . 9
6.2 Chamber method . 10
6.2.1 General. 10
6.2.2 Size relationship . 10
6.2.3 Tests . 10
6.3 Calculations and report . 11
Annex A (informative) Mechanical testing of dampers and valves . 18
A.1 General. 18
A.2 Instrumentation: Torque measurement . 18
A.3 Pressure test to determine limiting value for structural stability . 18
A.4 Torque tests to determine the torque required to operate the damper or valve and
the limiting value to avoid structural damage . 19
Annex B (informative) Thermal transmittance through dampers and valves . 21
B.1 General. 21
B.2 Thermal loss test using a substitution method . 21
Annex C (normative) Classification of a damper or valve leakage . 24
C.1 General. 24
C.2 Leakage through closed blade(s) . 24
C.3 Casing leakage . 26
Annex D (informative) Effect of duct configuration on pressure loss coefficient . 28
D.1 General. 28
D.2 Application of correction factor . 29
Bibliography . 30
European foreword
This document (EN 1751:2024) has been prepared by Technical Committee CEN/TC 156 “Air terminal
devices”, the secretariat of which is held by BSI.
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 by November 2024, and conflicting national standards shall
be withdrawn at the latest by November 2024.
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 document supersedes EN 1751:2014.
In comparison with the previous edition, EN 1751:2014, the following technical modifications have been
made:
— Annex C Classification of a damper or valve leakage;
• Closed blade leakage now has the addition of formulae for the calculation of classification levels
and an improved graph;
• Case leakage now has formulae for classification which are based on ductwork leakage classes
in EN 16798-3:2017, Table19 taking a reference case length of 1 m and also an improved graph.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia,
Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland,
Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North
Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the United
Kingdom.
1 Scope
This document specifies methods for the testing and rating of dampers and valves used in air distribution
systems with pressure differences up to 2 000 Pa.
The tests incorporated in this document will address:
— leakage past a closed damper or valve (for classification, see Annex C);
— casing leakage (for classification, see Annex C);
— flow rate/pressure requirement characteristics;
— torque: (see Annex A);
— thermal transmittance: (see Annex B).
The tests specified above are applicable to the following:
— measurement of leakage past a closed damper or valve;
— measurement of casing leakage;
— determination of flow rate and pressure requirements;
— measurement of torque characteristics (see Annex A);
— measurement of thermal transfer characteristics to determine insulation properties (see Annex B).
This document does not apply to the acoustic testing of dampers and valves.
NOTE Certain aspects of the dynamic performance of dampers and/or valves are dependent upon the air
distribution system to which they are connected and are, therefore, difficult to measure in isolation. Such
considerations have led to the omission of these aspects of the dynamic performance measurements from this
document. Also, in common with other air distribution components, the results from tests carried out in accordance
with this document might not be directly applicable if the damper or valve is situated in an area of non-uniform
flow.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 12792, Ventilation for buildings — Symbols, terminology and graphical symbols
EN 16798-3:2017, Energy performance of buildings — Ventilation for buildings — Part 3: For non-
residential buildings — Performance requirements for ventilation and room-conditioning systems (Modules
M5-1, M5-4)
CEN/TS 17153, Ventilation for buildings — Correction of air flow rate according to ambient conditions
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)
EN ISO 5167-2, Measurement of fluid flow by means of pressure differential devices inserted in circular
cross-section conduits running full — Part 2: Orifice plates (ISO 5167-2)
EN ISO 5167-3, Measurement of fluid flow by means of pressure differential devices inserted in circular
cross-section conduits running full — Part 3: Nozzles and Venturi nozzles (ISO 5167-3)
EN ISO 5167-4, Measurement of fluid flow by means of pressure differential devices inserted in circular
cross-section conduits running full — Part 4: Venturi tubes (ISO 5167-4)
3 Terms, definitions, symbols and suffixes
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 12792 apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
• ISO Online browsing platform: available at https://www.iso.org/obp
• IEC Electropedia: available at https://www.electropedia.org/
3.2 Symbols
The symbols used in this document are given in Table 1.
Table 1 — Symbols
Symbol Quantity Unit
A Internal cross-sectional area of duct m
C Coefficient of discharge -
D
D Equivalent diameter m
e
4 A
Circular ducts:
π
2ab
Square/Rectangular ducts:
ab+
p Absolute pressure Pa
p Atmospheric pressure Pa
a
p Velocity pressure 1/2 ρ v Pa
d
p Stagnation or absolute total pressure Pa
t
p Static gauge pressure (p - p ) Pa
s a
Δp Pressure difference across the damper or valve under test Pa
s
Δp Flow meter differential pressure Pa
Δp Conventional total pressure difference for an air density of Pa
t
−3
1,2 kg⋅m at the inlet to the damper or valve under test
−1
q Volume rate of air flow at the flow meter l⋅s
v
−1
q Leakage volume rate of air flow l⋅s
vL
−1 −2
q Closed blade air leakage factor, volume rate of air flow per unit l⋅s ⋅m
vLBA
duct cross
...
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