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Round louvre without frame<br />
431R<br />
m a t e r i a l<br />
c r o s s - s e c t i o n s<br />
• Made from aluminium sections: AlMgSi 0.5<br />
(according to EN 12020-2)<br />
• Finishing: satin anodised (20 microns) or<br />
powder-coated in any RAL or Syntha Pulvin ® colour<br />
(60-80 microns) (for UK min 40 microns)<br />
• Stainless steel 304 insect screen (2.3 x 2.3 mm)<br />
or mesh (6 x 6 mm) on request<br />
f i x i n g<br />
• Brackets pre-fitted to the frame<br />
d i m e n s i o n s<br />
• Depth to fit: 40 mm<br />
• Minimum diameter: 300 mm<br />
• Maximum diameter:<br />
- 1400 mm if anodised in satin colour<br />
- 1500 mm if powder-coated in RAL or Syntha Pulvin ® colour<br />
- over 1500 mm: in two parts<br />
Overall dimensions<br />
technical specifications<br />
431R<br />
Airflow (EN 13030)<br />
K-factor (supply) 25,77<br />
K-factor (discharge) 25,77<br />
C e coefficient 0,197<br />
C d coefficient 0,197<br />
Technical data<br />
Visual free area 58%<br />
Physical free area 45%<br />
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