CONTENTS DF-48 spherical diffuser 2 Selection and correction charts 5

DF-48 spherical diffuser Description The DF-48 long-throw, spherical diffuser in its standard version is manufactured entirely of anodised aluminium with a natural finish. By special order, the diffuser can be painted in any RAL colour. The diffuser has a volume control damper at the outlet. Application The DF-48 diffusers allow long throws with an acceptable noise level. The diffuser releases an occasional air jet with a throw of over 30 metres. They can be used for spot cooling and are especially appropriate for sport centres, industrial warehouses, clean rooms, recording studios, discotheques...

Dimensions of plenum boxes for Dimensions of plates with diffuser connection to round duct assemblies

Notes - This selection table is based on laboratory tests as per ISO 5219 (UNE 100.710) and ISO 5135 and 3741 standards. - 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-48 DF-48 model Selection charts DF-48-1.- Maximum vertical penetration.

DF-48 model DF-48-2.- Velocity of the air jet for the throw.

DF-48 model DF-48-3.1.- Vertical deviation of the air jet (non-isothermal jets).

DF-48 model DF-48-3.2.- Vertical deviation of the air jet (non-isothermal jets).

DF-48 model DF-48-3.3.- Vertical deviation of the air jet (non-isothermal jets).

DF-48 model DF-48-3.4.- Vertical deviation of the air jet (non-isothermal jets).

DF-48 model DF-48-3.4.- Vertical deviation of the air jet (non-isothermal jets).

DF-48 model DF-48-3.5.- Vertical deviation of air jet (non-isothermal jets).

DF-48 model DF-48-3.6.- Vertical deviation of the air jet (non-isothermal jets).

DF-48 model DF-48-4.- Ratio between air flow velocities. DF-48-5.- Ratio between temperature differences.

DF-48 DF-48 model DF-48-6.- Induction rate. DF-48-7.- Pressure drop and sound power level.

DF-48 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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