Circular Diffuser

Construction

Circular Diffuser
  • Frame and inner cones: High quality aluminium sheet as standard. Steel construction as option.
  • Damper frame and blades: Steel sheet with black matt finish.

Description

  • Frame and inner cones are made of high quality aluminium sheet construction with the advantages of corrosion resistance and rigidity.
  • Inner cones fixed centrally to the frame. Cones can be taken out by pushing inward, turn around and pull down. This provides easy installation, maintenance and access to the duct.
  • Radial, opposed blade damper is fixed to the frame by rivets. Damper can be operated by screw through diffuser face.
  • Foam gasket is sealed around the back of the frame as option to avoid air leakage.
  • Discharge pattern can be adjusted for horizontal flow by extending the cones and for vertical flow by retracting the cones.
  • Can be used for ceiling or exposed duct mounting especially in installation when an adjustable pattern is required.

Standard Finishes

  • Aluminium construction with white powder coated color finish (RAL 9010).
  • Steel construction with white powder coated finish (RAL9010)
  • Powder coated color finish as per other RAL color codes available as option.

Model ARDS

Same as ARD, but with steel construction.

Standard Sizes

  • N = Nominal size.
  • 630 mm dia diffuser available only in steel.
  • All the dimensions are in mm.
ARD ARDS N in mm dia A B C D F G
160 160 160 279 323 12 35 85 46
200 200 200 375 428 10 51 101 55
250 250 250 467 538 14 67 117 68
315 315 315 557 635 10 85 135 80
355 355 355 648 743 18 96 146 86
400 400 400 740 856 14 116 166 92
450 450 450 832 970 14 135 185 110
500 500 500 924 1081 17 149 199 116
- 630 630 1103 1286 18 182 232 116

Air Pattern

Horizontal Air Pattern

  • Pattern is obtained by extending the cones downwards.
  • This arrangement handles more capacity of air with increased induction and uniform air distribution.

Vertical Air Pattern

  • Pattern is obtained by retracting the cones upwards.
  • Air is delivered vertically without much induction.
  • Suitable for localized cooling in conditioned area and for higher altitudes.

Installation Details

  • ARDF: Screw fixing.
  • ARD: Concealed screw fixing from neck of the diffuser to the duct after removing internal cones.

How to Order

Model Size Quantity Finish
ARDF Specify neck size in mm diameter Specify in numbers A = RAL 9010
B = Other RAL colors

Selection example:

To order fixed round ceiling diffusers of 254 mm dia, qty = 75 numbers with white powder coated color finish (RAL 9010).

Order as: ARDF - 254 - 75 - A.

Model Size Quantity Finish
ARD Specify neck size in mm diameter Specify in numbers A = RAL 9010
ARDS B = Other RAL colors

Selection example:

To order round ceiling diffusers - adjustable cones of size 315 mm dia, quantity = 50 numbers with white powder coated color finish (RAL 9010).

Order as: ARD - 315 - 50 - A.