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 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 light weight and good mechanical resistance. There are suitable for HVAC commercial applications. CODIFICATION U range Commercial CONSTRUCTION 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 2.0 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 PERFORMANCES Seals Volume control O type None Antifrost G type Lateral stainless steel seals Top and bottom L shaped profi les Shut-off S type Lateral stainless steel seals Top and bottom L shaped profi les EPDM seals on the blades Airtight E type (aluminum blades only) 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* Class A In option: class B or class C Acceptable pressure Pa (for a length of 1m) Maximum air velocity Operating temperatures *Airtightness classifi cation according to EN 1751 standard. Pressure (Pa) Class 4 ULE Aluminium DIN m/s From -20 C to +80 C Leakage rate according to EN 1751 standard UWS Galvanized steel Class 3 Etanchéité suivant la norme EN1751 Class Leakage rate (l.s -1.m -2 ) Class 1 Class C 2

3 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 Actual sizes H+10 x L+10 WEIGHT (kg) 130 (or 110) H + 70 H + 10 Flanges L + 70 L + 10 = = L + 30 Ø10 Other dimensions on request. In option: circular fl ange up to Ø1120 H L 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. 100 H + 30 PRESSURE LOSSES The following pressure losses (Pa) are given according to the blades opening angle (in ) and air velocity (m/s). Damper type UWO equipped with gear wheels,.opposed blade operation. Air velocity (m/s) Opening angle < 5 < < < < Opening angle 0 = fully open damper 90 = closed damper 3

4 DYNAMICS REGENERATION Damper type UWO equipped with gear wheels. Opposed blade operation. Air flow noise Lw in db ( blades openning angle 30 ) Air velocity (m/s) USE LIMITS Fréquency (Hz) Global Datas are given for a damper 500 x 500 mm. For different sizes of dampers, you can use the formula below : X = Air fl ow nosie in db S = Damper section in m 2 x + 10 log ( S ) 0.25 They correspond to the difference between the upstream and downstream pressure that dampers of the U range can withstand. Pressure in Pa Blades length in mm Use limit Recommended limit 4

5 MOTOR TORQUE 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) 5