SONOFLEX 25 • Acoustic laminated aluminium flexible ducts

The SONOFLEX 25 is a thermally and acoustically insulated duct, consisting of a micro-perforated inner duct and a laminated 3-layer outer jacket. The pink fibreglass anti-allergic insulation has been developed especially for flexible ducting. A polyester barrier is applied between the fibreglass insulation and the inner duct to avoid the diffusion of insulation particles in the air stream.

• The SONOFLEX 25 flexible ducts are used in ventilation, air conditioning, and air handling systems where high mechanical strength, temperature, fire-resistance, and thermal and sound attenuating qualities are required

• Micro-perforated inner duct consisting of
• 1 layer of 7 μ aluminium
• 1 layer of 12 μ polyester (PET)
• 1 layer of 12 μ aliminized polyester (PET)
• Total thickness without glue: 31 μ
• Metalized polyester outer jacket 3-layer laminate, consisting of
• 2 layers of polyester of 12 μ each
• 1 layer aluminium of 7µ
• Total thickness without glue: 31 μ
• Fibreglass insulation:
• Density: 16 kg/m³
• Thickness: 25 mm
• Thermal resistance: 0,65 K.m²/W
• Thermal conductivity: 0,039 W/m K
• Colour: pink
• Polyester barrier of 12µ between insulation and inner duct
• Wire spacing: a steel spiral spring with a pitch of 25mm (Ø82-90mm), 36mm (Ø102-508mm)
• Colour: Aluminium

• Temperature range: From - 30°C till + 140°C
• Air velocity (max): 20 m/s
• Operating pressure: -188 up to 2500 Pa
• Center bend radius: 1 x Diameter minimum
• Diameter range: 82 mm - 508 mm
• Fire class: B - s1, d0 according to EN13501-1
• As the product does not contain PVC, no toxic vapours are released should fire occur
• Produced according EN 13180: Dia Class B, Thightness Class C, Sag<4°, Crushing strength 13-35kg compressed; 2-5kg uncompressed.

• Each standard length of 10 m is compressed in an individual, reinforced cardboard box

• Good resistance to many organic solvents
• Moderate resistance to acid and base

• The SONOFLEX 25 is suitable for applications where static discharges have to be avoided

• The SONOFLEX 25 ducts are not suitable for transporting air with a high concentration of acid and base
• The SONOFLEX 25 can not be used for discharging combustion gases from open fire places and oil-fired boilers

• Clamps type MCA
• Aluminium tape, type ALUTAPE 40
• Aluminium tape, type ALUTAPE 40S PREMIUM