SONOFLEX 25 is a thermally and acoustically insulated duct, consisting of a micro-perforated inner duct of the ALUFLEX type and a metalized polyester outer jacket. The pink fibreglass 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. This flexible duct is easy to install, either on circular or on oval connection parts. As the product does not contain PVC, no toxic vapours are released should fire occur

• 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 of the ALUFLEX type, consisting of 2 layers of 7 μ aluminium each, and 2 layers of 12 μ polyester each, total thickness with glue: 48,5 μ
• Metalized polyester outer jacket, consisting of 2 layers of polyester of 12 μ each, reinforced with glass fibre wire, total thickness: 30 μ
• Fibreglass insulation:
  - Density : 15 kg/m³
  - Thickness: 25 mm
  - Thermal conductivity: 0,040 W/m-K according to ASTM C-177
  - Colour: pink
  - Fire safety: Class 1according to UL 723 ASTM E-84
• Polyester barrier between insulation and inner ductDiameter range: 82 mm - 560 mm
• Wire spacing: a steel spiral spring of different thicknesses and a pitch of 25mm (Ø82-90mm), 36mm (Ø102-560mm)
• Colour: Aluminium

• Temperature range: From - 30°C till + 140°C
• Air velocity (max): 25 m / sec (4912 ft / min)
• Operating pressure (max): + 1500 Pa (+ 150 mm WC)
• Bend radius: 0.54 x D + 25mm
• Diameter range: 82 mm - 560 mm
• Fire resistance: LNE classification obtained M1
• Report number: F050918 - Cemate/6

• Each standard length of 10 m is compressed in an individual, reinforced cardboard box of 120 cm

• 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

• Sonoflex 250 with fire class M0 , upon request

• The connection of the plenum boxes shall be done with the use of acoustically and thermally insulated flexible ducts, M1/M1 according to French standard. The outer jacket shall be reinforced to prevent rupture
• Brand ATC Type SONOFLEX 25