Description
Features and Benefits
- Air tight – no air leakage, no fiber erosion.
- 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.
Properties
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.