U X Y W L. Gear wheels. Linkage. In option: Stainless steel AISI 304L , AISI 316L or painted steel (standard RAL)

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1 CODIFICATION CONSTRUCTION Commercial dampers of the U range are designed to control or shut off ductworks with airtightness classifi cation going from non-classifi ed to class 4 according to EN1751. The handling and installation of U dampers are easy considering their lightweight and good mechanical resistance. There are suitable for HVAC commercial applications. U range is available in Hygiene version (ISO 846 compliant). U range Commercial Width U X Y Steel frame 130 mm In option : 110 mm W L Gear wheels Linkage 130 O G S E Frame s width in mm Non classifi ed Class 1 Class 3 Class 4 Aluminium frame 110 mm Thickness 1.0 mm 1.7 mm Material Galvanized steel Z275 In option: Stainless steel AISI 304L , AISI 316L or painted steel (standard RAL) Aluminium 6060 Bearings None Polyamide PA 6.6 Drilling Flanges Ø10 mm in each angle In option: specifi c drilling 30 mm Undrilled In option: specifi c drilling Control Manual Motorised Square shaft 12mm - length 100mm Lever and manual locking Square shaft 12mm - length 100mm In option : actuator supplied and assembled in factory Linkage Gear wheels (UW type) Linkage (UL type) Opposed blade operation In option: parallel blade operation (linkage version only) Blades Galvanized steel Z275, thickness of 2 x 0.5mm In option: stainless steel AISI 304L , AISI 316L , painted steel (standard RAL) or profi led aluminium Pitch: 100mm Shaft Ø20 1

2 HYGIENE OPTION (ISO 846) Each plastic component of U range dampers has been tested according to ISO 846 standard by ILH Berlin laboratory. ISO 846 standard specifi es the methods for determining the deterioration of plastics due to the action of fungi, bacteria and soil microorganisms. U damper with hygiene option is equipped with obturation metal sheets along its periphery for an easier cleanability and maintenance required by the VDI 6022 part 1standard. These metal sheets also prevent any microorganism and dust proliferation in hard-to-reach parts of the damper. Obturation metal sheets Sealant in each angle. Sealant tested in accordance with ISO 846 standard PERFORMANCES Airtight damper S and E versions : EPDM gasket tested in accordance with ISO 846 standard Volume control O type Antifrost G type Shut-off S type Airtight E type (aluminum blades only) Seals None Lateral stainless steel seals Top and bottom L shaped profi les Lateral stainless steel seals Top and bottom L shaped profi les EPDM seals on the blades Lateral stainless steel seals Top and bottom L shaped profi les EPDM seals on the blades Blades airtightness* Non classifi ed Class 1 Class 3 Class 4 Frame s airtightness* Hygiene option (ISO 846) Available Class A In option: class B or class C Available with aluminium blades only Acceptable pressure Pa (for a length of 1m) Class C Available Maximum air velocity Operating temperatures 10 m/s From -20 C to +80 C *Airtightness classifi cation according to EN 1751 standard. 2

3 Blade s airtightness Pressure (Pa) Class 4 ULE Aluminium DIN 1946 Leakage rate according to EN 1751 standard UWS Galvanized steel Class 3 Class Leakage rate (l.s -1.m -2 ) Values taken from tests carried out in Cetiat laboratory according to EN Test report n et n A1. Frame s airtightness U Damper with option class C. Pressure (Pa) Leakage rate (l.s -1.m -2 ) Class C requirements according to EN 1751 (l.s -1.m -2 ) Class Values taken from tests carried out in Cetiat laboratory according to EN Test report n A1. 3

4 DIMENSIONS Height H from 200 to 1400 mm with a pitch of 50mm Length L from 200 to 1400 mm with a pitch of 50mm Effective sizes H+10 x L+10 WEIGHT (kg) H L 130/(110) Other dimensions on request. In option: circular transformation. H H L + 70 L +10 L + 30 Flange H Weights given for dampers in galvanized steel. A coeffi cient of 0.9 must be applied to the mentionned data for a damper equipped with aluminium blades. 4

5 PRESSURE LOSSES The following pressure losses (Pa) are given according to the blades opening angle (in ) and air velocity (in m/s). Damper type UWO equipped with gear wheels, opposed blade operation. Air velocity (m/s) Opening angle < < USE LIMITS Opening angle 0 = fully open damper 90 = closed damper They correspond to the difference between the upstream and downstream pressure that dampers of the U range can withstand in closed position according to the blade length Pressure (Pa) Blade length (mm) Maximum operating zone Recommended operating zone We recommend that the differential pressure does not exceed Pa for a -mm long U damper. Beyond the limitation use, construction is possible with intermediate backing. 5

6 REGENERATED NOISE The acoustic performances of our dampers have been tested in an independent laboratory (CTTM) according to ISO 7235:2009 standard. Air flow noise Lw in db ( blades opening angle 30 ) Damper type UWO - blades actuation via gear wheels (opposed blade operation): Air velocity Frequency (Hz) (m/s) Overall Damper type ULO - blades actuation via linkage (opposed blade operation): Air velocity Frequency (Hz) (m/s) Overall Data are given for a damper 500 x 500 mm. From these data, you can calculate the regenerated noise of a damper of different dimensions by applying the formula below for every frequency band: Lw 63 = x log ( S ) 0.25 X 63 = Air fl ow noise for a damper 500 x 500 mm at 63 Hz (in db) for a given air velocity => read the data in the table S = Damper section (in m 2 ). Lw 63 = Air fl ow noise required at 63 Hz (in db) for a given air velocity. Example Calculation of regenerated noise for a damper UWO 400 x 200 mm Damper section : S = 0.4 x 0.2 = 0.08 m 2 Calculation of the regenerated noise at 63Hz for an air velocity of 4 m/s: Lw 63 = log ( 0.08 ) = 40.8 db 0.25 Value in the table at a frequency of 63Hz and for an air velocity of 4 m/s. Repeat this calculation rules to get the regenerated noise for all frequencies (63Hz - 8kHz). 6

7 MOTOR TORQUES The following motor torques are given in Nm for a volume control damper type UWO or ULO. A coefficient of 1.3 must be applied to the mentioned data for an G, S or E type damper. Length (mm) P (Pa) Example : P = 500 Pa UWO 130 damper L = mm, H = mm => motor torque = 8 Nm Motor torque (Nm) Height (mm) 7