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Twiga Flexible Ducts
Twiga flexible ducts for HVAC systems are lightweight, strong, fully flexible and compressible, yet dimensionally stable.
25 ft. / 7.5 mStandard length
100 mm to 500 mm (4” to 20”)Diameter range
certified as per BS 476 Part 5, 6 & 7Fire rating
Overview
About Twiga Flexible Ducts
Each Twiga flexible duct is made of a double lamination of films permanently bonded to a coated spring steel wire helix. For thermal efficiency, the exterior is wrapped in a blanket of glasswool insulation, available in various densities and thicknesses to achieve the required thermal resistance. The outer jacket is a double laminated film with glass yarn reinforcement, which also acts as a vapour barrier.
Twiga flexible ducts can be used widely in all air conditioning and ventilating systems, including commercial and office buildings, hotels, hospitals and many other industrial and residential applications.
Available in a variety of styles and constructions, Twiga flexible ducts provide the most economical solution for your air handling needs.
Features
Features and benefits
Core material
Low friction loss, strong and flame resistant.
Vapour barrier
Reinforced for maximum toughness and tear resistance.
Wire
Strong and non corrosive.
Modular and economical air distribution system with maintenance free life
High degree of flexibility which allows it to be connected to any desired position.
A quick and economical means of correcting misalignment between system components.
Available as bare and pre-insulated.
Reduces total installed cost
Fast and easy to install.
Allows ducting around obstacles where fabricated and fitted ducts would be difficult and costly to install.
Technical data
Insulated flexible ducts
- Standard length
- 25 ft. / 7.5 m
- Diameter range
- 100 mm to 500 mm (4” to 20”)
- Maximum rated velocity
- 4000 ft /min
- Temperature range
- 0-90 degrees Celsius
- Maximum rated positive pressure
- 10 inch Water
- Maximum rated negative pressure
- 1 inch Water
- Standard insulation density
- 16 Kg/m³
- Standard insulation thickness
- 25 mm
- Insulation R value
- 0.64 m²K/W
- Fire rating
- certified as per BS 476 Part 5, 6 & 7
Specification
Uninsulated flexible duct shall be made of double lamination of metalized polyester film permanently bonded to a coated spring steel wire helix. Duct shall be in tear and puncture resistant construction.
Insulated flexible duct – Inner core should be made of double lamination of polyester film permanently bonded to a coated spring steel wire helix. Blanket of glass insulation of R 4.2 (RSI – 0.76 m²K/W) having density of 24 Kg/m³ and thickness of 25 mm shall be wrapped over the inner core and covered with tear and abuse resistant outer jacket cum vapour barrier made of fiber glass reinforced double layer of metalized polyester film laminate.
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