Rigid takeoff and terminal centers do not align exactly.
A short flexible section accommodates a gentle offset.
A coated woven-fiberglass liner is supported by a spring-wire helix, surrounded by insulation and a reinforced metallized jacket. The compact four-inch bore allows short flexible alignment between a rigid branch and a small terminal connection.
| Nominal Inside Diameter | 102 mm (4 in) |
|---|---|
| Standard Length | 7.62 m (25 ft) |
| Insulation Value | R-8 |
| Inner Liner | Coated woven fiberglass |
| Support | Coated spring-steel helix |
| Outer Jacket | Reinforced metallized film |
| Temperature Range | −20 to +250 °F |
| Maximum Air Velocity | 6000 fpm |
| Pressure Limits | +16 / −2 in. w.g. |
| Tùy chỉnh | Lengths can suit the intended indoor terminal application and environment. |
A short flexible section accommodates a gentle offset.
The surrounding insulation and low-permeability jacket reduce heat transfer and moisture entry.
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