DF-47 Long-throw rectangular diffusers

CONTENTS DF-47 rectangular diffuser 2 Selection and correction charts 5

DF-47 rectangular diffuser Description The DF-47 long-throw rectangular diffuser is manufactured entirely of anodised aluminium with a natural finish. The diffuser is composed of a drum allowing the unit to be swiveled, thereby permitting the inlet airflow to be vertically positioned at an angle of ±20º. The unit is also equipped with deflecting blades for distributing the air in horizontal fan-shape or concentrating the inlet airflow in the desired direction. Application These long-throw, high-flow diffusers are particularly useful when the air jet should reach some distance or should be fanned...

The AE model with the motor drive is longer, due to the servo motor. The CC model, constructed to be fitted directly to the round duct, can also be motor-driven (AE). The diffusers can be swiveled ±20° around the horizontal symmetry axis.

Notes - This selection table is based on laboratory tests as per ISO 5219 (UNE 100.710) and ISO 5135 and 3741. - AT is equal to 0°C (isothermal air). - The behaviour of the air jet with different At is shown in the following charts. Symbols Q = Air flow VK = Effective velocity AK = Effective area APt = Total pressure drop LwA = Sound power X0,3 - X0,5 - X1i0 = Throw for a terminal air velocity of 0.3, 0.5 and 1.0 m/s, respectively.

DF-47 DF-47 model Selection charts DF-47-1.-Maximum vertical penetration

DF-47 model DF-47-2.- Velocity of the air jet in the throw

DF-47 model DF-47-3.1.- Vertical deviation of the air jet (non-isothermal jets)

DF-47 model DF-47-3.2.- Vertical deviation of the air jet (non-isothermal jets)

DF-47 model DF-47-3.3.- Vertical deviation of the air jet (non-isothermal jets)

DF-47 model DF-47-3.4.- Vertical deviation of the air jet (non-isothermal jets)

DF-47 model DF-47-3.5.- Vertical deviation of the air jet (non-isothermal jets)

DF-47 model DF-47-4.- Ratio between air flow velocities. DF-47-5.- Ratio between temperature differences.

DF-47 DF-47 model DF-47-6.- Induction rate DF-47-7.- Pressure drop and sound power level

DF-47 Symbols Common symbols used in all tables and charts in the catalogue. Distance between the equipment to the impact point of the jets (with another jet or wall) under isothermal conditions. Supply angle. Horizontal distance from the equipment to the impact point of the jets (with another jet or wall). Throw of the air jet. Deviation of the air jet caused by a temperature difference between the supply and ambient air. Installation height of the equipment. Height of occupied area. Height from the impact point of the jets (with another jet or wall) under isothermal conditions with respect to...

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