SJD
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Novenco Louvre Dampers SJD May 2003

Product Facts Louvre dampers for shut-off, In ventilation systems and other air handling installations. Temperature range: from -20°C to SJD is available with an aluminium frame (type SJD-FA) or an aluzine- coated steel frame (type SJD-SZ). An aluminium or aluzine-coated sheet steel frame with an opposed damper blade arrangement for automatic or manual operation. The damper blades can easily be changed to a parallel requirements in accordance with the SJD-FA dampers meet the accordance with the following SJD-SZ dampers meet corresponding unheated low-corrosion environment in accordance with...

Novenco Louvre Dampers SJD Dimensions - Weights - Torques 4 Operation - Damper Couplings 5 Continuous product development at Novenco may result in changes being introduced without prior notice

Novenco louvre dampers type SJD are a range of robust, leakproof, smooth-acting dampers that are used in ventilation systems for shut- off, regulation and mixing functions. Temperature range: from -20°C to - an aluminium frame (SJD-FA) - an aluzine-coated steel frame The FA dampers consist of a frame of aluminium sections in which the damper blades are mounted on stainless steel shafts. The bearings are nylon sleeve bearings. At both sides, the damper shafts extend out though the side The damper blades are made of smooth, extruded aluminium sections with a sealing strip on one contact edge....

Dimensions - Weights - Torques combinations of height and width as stated in the table below. The table also includes weights and following example: Damper type- D: 20 mm for U-cleat (steel frame) 40 mm for duct flange (aluminium frame) see under Pressure Loss. Overview of Dampers and Torques The top figures in the table show the weights (kg) of the individual dampers. The bottom figures (in italics) show the torques (Nm) of the dampers for damper motor selection.

Duct Connections (flange joint) Drilled together Mating flange Operation - Damper Couplings Manual operation Swivel action damper motor Opposed damper blade arrangement Opposed damper blade Linear action damper motor Damper motor with direct shaft drive Parallel damper blade

Pressure Loss The values apply to dampers mounted in a duct system. For free outflow, the speed loss (pd) corresponding to the front area must The opening angle refers to the dimensioned drawing on page 4. Damper with opposed damper blade arrangement. Pressure loss in damper = 400 Pa Maximum Differential The maximum differential pressure when the damper is closed is: Opposed damper blade arrangement The graphs apply to an air temperature Parallel damper blade arrangement

Sound Conditions The sound power level LW (réf. 10~ 12 W) applies to a damper with a The following applies to other Opposed damper blade arrangement individual octave bands in the table below are added, with their signs, to the sound power level reading. The values for the sound power level are measured in accordance with example on page 6 are inserted in the graph for sound values (opposed damper blade arrangement): Pressure loss in damper: 400 Pa. The sound power level for 1 m2 can The actual sound power level is: The corrected sound spectrum, divided into the individual octave bands, is...

Novenco develops and manufactures ventilation and fire fighting systems that are marketed and distributed world-wide through subsidiaries and agents. The company was founded in Denmark world-leading suppliers. Novenco symbolises quality and environ- mentally friendly products. The company The headquarters of Novenco is located Novenco, Hi-Pres and XFlow are registered trademarks of Novenco. Read more about Novenco on the