BTC • Rectangular sound attenuator

Rectangular sound attenuator in galvanised steel

• The sound attenuators are used to absorb the noise in air conditioning or ventilation ducts

• Casing in galvanized steel, thickness 1,0 mm
• Metu flange 30 mm up to 6,0 m of perimeter or flange 40 mm over 6,1 m of perimeter
• Acoustic baffles with casing in galvanized steel thickness 0,6 mm (baffles 200 mm thick), thickness 0,8mm for other baffles
• Acoustic material in mineral wool 60Kg /m³ with protection against erosion by glass fibre, fire resistance M0 and non combustible material used in A,B and C class in accordance council directive 96/98/EC on Marine Equipment (Rina) 
• Acoustic data tested in accordance to ISO 11691 (test report N°142976) 
• Pressure loss data tested in accordance to ISO 7244 (test report N° 136363) 
• Noise of sound attenuator tested in accordance to ISO 23741 (test report N° 149877)
• BTC-A : with baffles totally in protected mineral wool, suitable to absorb the noise at medium high frequencies (250÷8k Hz)
• BTC-O : with baffles half covered with galvanized steel, suitable to absorb the noise at low frequence (125 Hz) (on request with galvanized plate with perforated stripes)
• Baffles thickness 100,200,300 mm with possibility of aerodynamic profile  
• Extended metal sheet protection for acoustic material
• Plastic and extended metal sheet protection for acoustic material, especially for hospital, pharmaceutic or microelectronic industries

• Other glass fibre protection available
• Casing in stainless steel on request

(QTY)=1no (Dimensions W X H X L)=600mm x 300mm x 1500mm Long (Model)=BTC

(Description)=Rectangular Silencer (Accesories)=With Duct Flanges

V : speed referred to the sections BxH [m/s]

∆pt  : total pressure drop [Pa]

LwA : sound power level weight A [dB(A)]

200/100 : baffle thickness / distance between baffles; rapport between free area / total area = 33%

200/150 : baffle thickness / distance between baffles; rapport between free area / total area = 43%

200/200 : baffle thickness / distance between baffles; rapport between free area / total area = 50%