is a fully thermally insulated duct consisting of an inner duct of the ALUFLEX 112 type and a 2-layer aluminium seamless outer jacket. The new pink fibreglass insulation has been developed especially for flexible ducting. The ISOFLEX 250 is easy to install, either on circular or oval connection parts. ISOFLEX 250 has been tested for fire resistance, in accordance with the valid international standards. As the product does not contain PVC, no toxic vapours are released should fire occur

• The ISOFLEX 250 flexible ducts are used in ventilation, air conditioning, and air handling systems where high mechanical strength, temperature resistance, and high thermal insulating qualities are required

• Inner duct of the ALUFLEX 112 type, thickness: 57 μ
• 2 layers of polyester, reinforced, 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
• Wire spacing: a steel spiral spring of different thicknesses and a pitch of 25mm (Ø82-90mm), 36mm (Ø102-560mm)
• Colour : Aluminium

• Temperature range: inner duct: from - 30°C till + 200°C
  outer jacket: from - 30°C till + 140°C
• Air velocity (max): 30 m / sec (5900 ft / min)
• Operating pressure (max): + 2500 Pa (250 mm WC)
• Bend radius: 0.54 x D + 25mm
• Pressure loss: see diagram
• Diameter range: 82 mm - 560 mm
• Fire resistance: LNE classification obtained M1 / M0
• Report number: F014932 - Cemate/13

• Each standard length of 10 m is compressed in an individual, reinforced cardboard box of 120 cm to avoid damaging of the duct and to facilitate storage

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

• The ISOFLEX 250 is suitable for applications where static discharges A have to be avoided

• The ISOFLEX 250 ducts are not suitable for transporting air with a high concentration of acid and base
• The ISOFLEX 250 cannot be used for discharging combustion gases from open fireplaces and oil-fired boilers

• Clamps type MCA
• Alutape

• The connection of the plenum boxes shall be done with the use of thermally insulated flexible ducts, M0/M1 according to French standard. The outer jacket shall be reinforced to prevent rupture
• Brand ATC Type ISOFLEX 250