EGAF Aphonic grilles

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Home General catalogue Air Diffusion Silencers Egaf Aphonic Grilles
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Description

Galvanized steel aphonic grilles for both supply and exhaust air, with blades inclined by 45°.

Characteristics

The frame is made of galvanised steel sheet, with a standard depth of 300 mm. Blades with a 150 mm pitch made of galvanised steel sheet, shaped to contain the sound-absorbing material. Inside coated with micro-stretched mesh.
40 mm galvanised steel perimeter flange.
Bird mesh on request.
Sound-absorbing material with high density mineral wool, in fire reaction Class “0” (non-combustible) (Italian Ministerial Decree 26/06/1984).
Maximum operating temperature: 250°C. Maximum operating pressure: 2,000 Pa.

Installation

Assembly with screws on 40 mm flange or directly on duct.

Model

EGAF thickness 100mm;
EGAF thickness 150mm;
EGAF thickness 200mm;
EGAF thickness 300mm;
EGAF thickness 600mm (300mm + 300mm).

On request

-Stainless steel or aluminium frames
-Possibility of supplying painted product.
-L depths different from the standard.

Dimensions and effective cross-sections:

 
  H (mm)
B (mm) 450 600 750 900 1050 1200 1350 1500 1650 1800 1950
  effective cross-section m²
300 0,02 0,05 0,06 0,09 0,10 0,12 0,13 0,16 0,17 0,20 0,21
400 0,03 0,07 0,09 0,12 0,14 0,17 0,19 0,22 0,24 0,28 0,29
500 0,04 0,09 0,11 0,16 0,18 0,22 0,24 0,29 0,31 0,36 0,38
600 0,05 0,11 0,14 0,19 0,22 0,27 0,30 0,35 0,38    
700 0,06 0,13 0,16 0,23 0,26 0,32 0,35 0,42 0,45    
800 0,07 0,16 0,19 0,28 0,30 0,37 0,41 0,48 0,52    
900 0,08 0,17 0,21 0,30 0,34 0,42 0,48 0,55      
1000 0,09 0,19 0,24 0,33 0,38 0,47 0,52 0,61      
1100 0,10 0,21 0,26 0,37 0,42 0,52 0,57 0,68      
1200 0,11 0,23 0,29 0,40 0,46 0,57 0,63        
1300 0,12 0,25 0,31 0,44 0,50 0,62 0,68        
1400 0,13 0,27 0,34 0,47 0,54 0,67 0,74        
1500 0,14 0,29 0,36 0,51 0,58 0,72          
1600 0,15 0,31 0,39 0,54 0,62 0,77          
1700 0,16 0,33 0,41 0,58 0,66 0,82          
1800 0,17 0,35 0,44 0,61 0,70            

Technical data:

 
  H (mm)
B (mm) 450 600 750 900 1050 1200 1350 1500 1650 1800 1950
  Maximum air flow rate recommended in m³/h and pressure drop equal to 68 Pa.
300 680 1350 1690 2370 2710 3380 3720 4400 4730 5410 5750
400 950 1900 2380 3330 3810 1760 5240 6190 6670 7620 8100
500 1230 2460 3070 4300 4910 6140 6760 7990 8600 9830 10440
600 1500 3010 3760 5270 6020 7520 8280 9780 10530    
700 1780 3560 4450 6230 7120 8900 9790 11570 12460    
800 2060 4110 5140 7200 8230 10280 11310 13370 14400    
900 2330 4670 5830 8160 9330 11660 12830 15160      
1000 2610 5220 6520 9130 10440 13040 14350 16960      
1100 2880 5770 7210 10100 11540 14420 15670 18750      
1200 3160 6320 7900 11060 12640 15810 17390        
1300 3440 6870 8590 12030 13750 17190 18900        
1400 3710 7430 9280 13000 14850 18570 20420        
1500 3990 7980 9970 13960 15960 19950          
1600 4270 8530 10660 14930 17060 21330          
1700 4540 9080 11350 15890 18170 22710          
1800 4820 9630 12040 16860 19270            

Insertion attenuation

The insertion attenuation is the ability of the aphonic grille to reduce the noise produced by the ventilation system to the outside.

 
Model Hz 63 125 250 500 1000 2000 4000 8000
EGAF thickness 100mm [dB] 1 2 3 5 8 9 9 10
EGAF thickness 150mm [dB] 2 3 3 7 9 11 10 11
EGAF thickness 200mm [dB] 3 4 4 7 11 13 12 12
EGAF thickness 300mm [dB] 3 4 5 9 12 15 14 15
EGAF thickness 600mm (300mm + 300mm) [dB] 4 5 9 15 22 27 25 24

Soundproofing power

Soundproofing power is the ability of an element to prevent sound waves from passing from one room to another. It characterises the acoustic features of dividers and partitions, as well as of aphonic grilles installed on walls. Its soundproofing power complies with UNI EN ISO 140 - 3:2006 and UNI EN ISO 717 -1:2007.

 
Model Hz 125 250 500 1000 2000 4000 Rw
EGAF thickness 100mm [dB] 2 4 7 9 9 10 9,0
EGAF thickness 150mm [dB] 3 5 7 10 11 11 10,0
EGAF thickness 200mm [dB] 5 6 7 12 15 14 12,0
EGAF thickness 300mm [dB] 6 7 10 18 22 23 16,0
EGAF thickness 600mm (300mm + 300mm) [dB] 6 10 17 24 30 27 21,8

Pressure drops

Pressure drops in EGAF series aphonic grilles depend on the air velocity inside the duct and also on the direction of the air. In fact, pressure drops are generally greater in supply than in exhaust.

 
Model m/s 1 2 3 4 5 6 8 10
EGAF thickness 100mm Pa 5 19 43 75 117 167 293 453
EGAF thickness 150mm Pa 6 23 52 90 140 200 351 544
EGAF thickness 200mm Pa 7 27 60 106 163 233 410 634
EGAF thickness 300mm Pa 8 31 68 120 186 266 467 723
EGAF thickness 600mm (300mm + 300mm) Pa 13 53 121 218 344 499 896 1412

Price list: prices on request

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AIR DIFFUSION FIRE SAFETY MVHR - MECHANICAL VENTILATION HEAT RECOVERY SANITIZATION VENTILATION FLEXIBLE DUCTS SPIRO DUCTS AND FITTINGS FILTRATION INSULATION TAPES AND GASKETS REGULATORS ACCESSORIES AND PARTS
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