1、June 2014 Translation by DIN-Sprachendienst.English price group 14No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 9
2、1.140.30!%25x“2151885www.din.deDDIN EN 1751Ventilation for buildings Air terminal devices Aerodynamic testing of damper and valves;English version EN 1751:2014,English translation of DIN EN 1751:2014-06Lftung von Gebuden Gerte des Luftverteilungssystems Aerodynamische Prfungen von Drossel- und Abspe
3、rrelementen;Englische Fassung EN 1751:2014,Englische bersetzung von DIN EN 1751:2014-06Ventilation des btiments Bouches dair Essais arodynamiques des registres et clapets;Version anglaise EN 1751:2014,Traduction anglaise de DIN EN 1751:2014-06SupersedesDIN EN 1751:1999-01www.beuth.deDocument compris
4、es 31 pagesIn case of doubt, the German-language original shall be considered authoritative.05.14DIN EN 1751:2014-06 2 A comma is used as the decimal marker. National foreword This document (EN 1751:2014) has been prepared by Technical Committee CEN/TC 156 “Ventilation for buildings” (Secretariat: B
5、SI, United Kingdom). The responsible German body involved in its preparation was the Normenausschuss Heiz- und Raumlufttechnik (Heating and Ventilation Technology Standards Committee), Working Committee NA 041-02-52 AA Komponenten (SpA CEN/TC 156/WG 3 und 4). Amendments This standard differs from DI
6、N EN 1751:1999-01 as follows: a) in Clause 4 “Instrumentation”, the requirements for accuracy have been revised; b) Clause 6 has been restructured and Subclause 6.2 “Chamber method” has been added; c) in Subclause 6.3 “Test report”, the requirements have been rendered more precise; d) Annex D “Effec
7、t of duct configuration on pressure loss coefficient” has been added. Previous editions DIN EN 1751: 1999-01 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1751 January 2014 ICS 91.140.30 Supersedes EN 1751:1998English Version Ventilation for buildings - Air terminal devices - Aerodynamic test
8、ing of damper and valves Ventilation des btiments - Bouches dair - Essais arodynamiques des registres et clapets Lftung von Gebuden - Gerte des Luftverteilungssystems - Aerodynamische Prfungen von Drossel- und Absperrelementen This European Standard was approved by CEN on 9 November 2013. CEN member
9、s 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
10、 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 Managemen
11、t 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, Li
12、thuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17,
13、 B-1000 Brussels 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1751:2014 EEN 1751:2014 (E) 2 Contents Page Foreword 3 1 Scope 4 2 Normative references 4 3 Terms, definitions, symbols and suffixes .5 3.1 Terms and definitions
14、 .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 met
15、hod 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 Tor
16、que 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
17、 (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 DIN
18、EN 1751:2014-06 EN 1751:2014 (E) 3 Foreword This document (EN 1751:2014) has been prepared by Technical Committee CEN/TC 156 “Ventilation for buildings”, 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 iden
19、tical text or by endorsement, at the latest by July 2014, and conflicting national standards shall be withdrawn at the latest by July 2014. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held respo
20、nsible for identifying any or all such patent rights. This document supersedes EN 1751:1998. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus,
21、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 the United Kin
22、gdom. DIN EN 1751:2014-06 EN 1751:2014 (E) 4 1 Scope This European Standard 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 European Standard are: a) leakage past a closed dam
23、per or valve (for classification see Annex C); b) casing leakage (for classification see Annex C); c) flow rate/pressure requirement characteristics; d) torque: (see Annex A); e) thermal transmittance: (see Annex B). The acoustic testing of dampers and valves is not included in this European Standar
24、d. The tests specified above apply to the following: f) measurement of leakage past a closed damper or valve; g) measurement of casing leakage; h) determination of flow rate and pressure requirements; i) measurement of torque characteristics (see Annex A); j) measurement of thermal transfer characte
25、ristics to determine insulation properties (see Annex B). NOTE Certain aspects of the dynamic performance of dampers 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 omissio
26、n of these aspects of the dynamic performance measurements from this European Standard. Also, in common with other air distribution components, the results from tests carried out in accordance with this European Standard may not be directly applicable if the damper or valve is situated in an area of
27、 non-uniform flow. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (
28、including any amendments) applies. EN 12792, Ventilation for buildings - Symbols, terminology and graphical symbols 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 requirement
29、s (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 cro
30、ss-section conduits running full - Part 3: Nozzles and Venturi nozzles (ISO 5167-3) DIN EN 1751:2014-06 EN 1751:2014 (E) 5 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)
31、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. 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
32、m2CDCoefficient of discharge - DeEquivalent hydraulic diameter Circular ducts: A4Square/Rectangular ducts: baab+2m p Absolute pressure Pa pa Atmospheric pressure Pa pdVelocity pressure 1/2 v2Pa ptStagnation or absolute total pressure Pa psStatic gauge pressure (p - pa) Pa psPressure difference acros
33、s the damper or valve under test Pa p Flow meter differential pressure Pa ptConventional total pressure difference for an air density of 1,2 kgm3at the inlet to the damper or valve under test Pa qvVolume rate of air flow at the flow meter ls1qvLLeakage volume rate of air flow ls1qvLBAClosed blade ai
34、r leakage factor, volume rate of air flow per unit duct cross sectional area ls1m2qvLCACase air leakage factor, volume rate of air flow per reference casing area (which is taken as perimeter of damper multiplied by an equivalent length of 1 m) ls1m2v Velocity ms1DIN EN 1751:2014-06 EN 1751:2014 (E)
35、6 Symbol Quantity Unit s Position of damper setting %, or m T Torque Nm U Thermal transmittance coefficient WK1m2q Temperature C Air density kgm-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 un
36、der 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
37、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
38、 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 calib
39、ration 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
40、flow meters shall have a minimum indicated accuracy according to the ranges in Table 2. Table 2 Accuracy of leakage air flow meters Range ls1Accuracy of measurement Up to and including 0,018 0,000 9 ls1More than 0,018 5 % DIN EN 1751:2014-06 EN 1751:2014 (E) 7 NOTE Alternatively, other devices such
41、as variable area, flow-rate meters or integrating air flow meters of the positive displacement type can be used if calibrated in accordance with 4.1.3 c). 4.2 Pressure measurement 4.2.1 Pressure in the duct shall be measured by means of a liquid filled, calibrated manometer or any other device confo
42、rming to 4.2.2. 4.2.2 The resolution shall not be greater than the characteristics listed for the accompanying range of manometers, given in Table 3. Table 3 Resolution for the ranges of manometers Range Pa Resolution Pa Up to and including 50 From 50 to 250 From 250 to 500 Above 500 0,1 1 5,0 25,0
43、4.2.3 The measured value of differential pressure should be greater than 10 % of the range of the measurement device used. EXAMPLE With a micromanometer with a range from 0 to 1 000 Pa the minimum differential pressure to be measured is 100 Pa. 4.2.4 The uncertainty of calibration standards shall be
44、: a) for instruments with a measuring range up to 100 Pa, equal or better than 0,5 Pa; b) for instruments with a measuring range over 100 Pa, equal or better than 0,5 % of reading. 4.3 Temperature measurement Measurement of temperature shall be, for example, by means of mercury-in-glass thermometers
45、, resistance thermometers or thermo-couples. Instruments shall have a resolution better than 0,5 K and be calibrated to an accuracy of 0,25 K. 5 Leakage tests 5.1 General Damper leakage performance could vary depending on whether the damper is subjected to positive or negative pressure. The manufact
46、urer shall specify the pressure conditions for test. 5.2 Damper and valve leakage 5.2.1 Measurement of damper and/or valve leakage in the shut-off position shall be made under conditions of actual operation with the damper or valve closing against the maximum recommended static pressure conditions.
47、Since small flow rates exist during the closed damper or valve condition, the method used to measure these small flow rates will introduce a high pressure loss when the damper or valve is open. This precludes a high pressure difference in the inlet duct until the damper or valve approaches the close
48、d position. DIN EN 1751:2014-06 EN 1751:2014 (E) 8 As the valve is closed and the flow rate decreases, the inlet static pressure difference will increase to approximately the recommended inlet pressure. 5.2.2 The damper or valve shall be cycled 10 times between the fully open and fully closed positi
49、ons of the actuator at the start of each test (before starting the fan of the air supply system) concluding with the damper or valve in the fully closed position. NOTE In all cases in the closed position, the damper drive is subject to a torque rating recommended by the manufacturer. 5.2.3 The damper or valve under test shall be connected to a test installation similar to that shown in Figure 1a) or Figure 1b). A suitable air supply shall be connected to the duct. In both cases, care shall be taken to e
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