EN 1751:2014

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.LþQRLüftung von Gebäuden - Komponenten des Luftverteilersystems - Aerodynamische Prüfung von Drossel- und AbsperrelementenVentilation des batiments - Bouches d'air - Essais aérodynamiques des registres et clapetsVentilation for buildings - Air terminal devices - Aerodynamic testing of damper and valves91.140.30VLVWHPLVentilation and air-conditioningICS:Ta slovenski standard je istoveten z:EN 1751:2014SIST EN 1751:2014en,fr,de01-julij-2014SIST EN 1751:2014SLOVENSKI
STANDARDSIST EN 1751:19991DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 1751
January 2014 ICS 91.140.30 Supersedes EN 1751:1998English Version
Ventilation for buildings - Air terminal devices - Aerodynamic testing of damper and valves
Ventilation des bâtiments - Bouches d'air - Essais aérodynamiques des registres et clapets
Lüftung von Gebäuden - Geräte des Luftverteilungssystems - Aerodynamische Prüfungen von Drossel- und Absperrelementen This European Standard was approved by CEN on 9 November 2013.
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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
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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 .7 5.1 General .7 5.2 Damper and valve leakage .7 5.3 Casing leakage .8 6 Flow rate and pressure tests .8 6.1 Ducted method .8 6.2 Chamber method . 10 6.2.1 General . 10 6.2.2 Size relationship . 10 6.2.3 Tests . 10 6.3 Test report . 10 Annex A (informative)
Mechanical testing of dampers and valves . 17 A.1 Scope . 17 A.2 Instrumentation: Torque measurement . 17 A.3 Pressure test to determine limiting value for structural stability . 17 A.4 Torque tests to determine the torque required to operate the damper or valve and the limiting value to avoid structural damage . 18 Annex B (informative)
Thermal transmittance through dampers and valves . 20 B.1 Introduction . 20 B.2 Scope . 20 B.3 Thermal loss test using a substitution method . 20 Annex C (normative)
Classification of a damper or valve leakage . 23 C.1 Scope . 23 C.2 Leakage through closed blade(s). 23 C.3 Casing leakage . 23 Annex D (informative)
Effect of Duct Configuration on Pressure Loss Coefficient . 26 D.1 General . 26 D.2 Application of correction factor . 28 Bibliography . 29
Air density kg„m-3
Pressure loss coefficient - 3.3 Suffixes The following suffixes shall be used with the symbols given in Table 1. 1 is the inlet of the damper or valve under test; 2 is the outlet of the damper or valve under test; u is the measuring point upstream of the flow meter; n is the value at a selected point of the flow rate/static pressure curve. 4 Instrumentation 4.1 Air flow rate measurement 4.1.1 The air flow rate shall be measured using instruments in accordance with EN ISO 5167-1, EN ISO 5167-2, EN ISO 5167-3 and EN ISO 5167-4, or other instruments which have equivalent calibrated performance. 4.1.2 Air flow meters shall have a minimum calibration accuracy of ± 2,5 % over the whole range. NOTE If necessary, flow meters can be calibrated in situ by means of the Pitot static tube traverse technique described in ISO 3966. 4.1.3 Flow meters shall be checked at intervals as appropriate but not exceeding 12 months. This check can take the form of one of the following: a) a dimensional check for all flow meters not requiring calibration; b) a calibration over their full range using the original method employed for the initial calibration of meters calibrated in situ; c) a check against a flow meter which meets flow meter specifications according to EN ISO 5167-1, EN ISO 5167-2, EN ISO 5167-3 or EN ISO 5167-4 as appropriate. 4.1.4 Leakage air flow meters shall have a minimum indicated accuracy according to the ranges in Table 2. Table 2 — Accuracy of leakage air flow meters Range l„s−1 Accuracy of measurement Up to and including 0,018 ± 0,000 9 l„s−1 More than 0,018 ± 5 % SIST EN 1751:2014
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