ISO 9001
SMACNA
Product Code: CEI-FRD / FRD-INS / FRD-UN
Flexible Round Duct
مجرى هواء مرن دائري
Insulated and non-insulated flexible round ducts for final connections to diffusers and terminals. Multi-layer spiral wire reinforced. Operating temperature -20°C to +120°C.
Frame Material
Product Description
Castle Flexible Round Ducts are multi-layer flexible ductwork for connecting diffusers, grilles and terminal units to the main duct system. Available in insulated and non-insulated versions. The inner core is a spiral wire-reinforced aluminium laminate providing a smooth internal surface for low friction loss. Outer jacket is reinforced aluminium/polyester laminate.
Technical Specifications
| Parameter | Value | Unit |
|---|---|---|
| Inner Core | Spiral wire-reinforced aluminium/polyester laminate | — |
| Insulation | 25mm / 50mm glass wool — 16 kg/m³ density | mm |
| Outer Jacket | Reinforced aluminium/polyester vapour barrier | — |
| Diameter Range | Ø100 to Ø500mm | mm |
| Standard Length | 10m per carton (compressed) | m |
| Temperature Range | -30°C to +140°C | °C |
| Max Velocity | 15 m/s | m/s |
| Max Pressure | 2500 Pa (positive) / 500 Pa (negative) | Pa |
| Fire Rating | Class 1 per UL 181 / Class 0 per BS 476 | — |
| R-Value (insulated) | R-4.2 (25mm) / R-6.0 (50mm) | — |
| Compliance | UL 181 / NFPA 90A / SMACNA | — |
Fields of Application
Tests & Certificates
ISO Certification
International Quality Certifications
International Standards
SMACNA · DW144 · IGC · UL
Duct Test
Rigorous leakage and pressure testing to SMACNA and DW144 standards.
Air Tests
Air velocity and distribution testing.
