ISO 9001
SMACNA
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Product Code: CEI-FD / FD-AL / FD-PVC
Flexible Duct
مجرى هواء مرن
Flexible ductwork for complex routing where rigid duct installation is impractical. Aluminium foil construction with polyester insulation. Ideal for last-metre connections and retrofit applications.
Frame Material
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ISO 9001:2015SMACNADW144
Description
Product Description
Castle Flexible Ducts are general-purpose uninsulated flexible ductwork for air distribution, exhaust and ventilation applications. Constructed from multi-ply aluminium laminate with embedded spiral wire for shape retention. Lightweight, compressible for shipping, and extends to full length on site. Available in aluminium and PVC versions.
Ultra Lightweight
Weighs fraction of rigid ductwork — easy to handle and install in tight ceiling spaces.
Compressible
7:1 compression ratio — reduces shipping volume and storage space dramatically.
Shape Retention
Embedded spiral wire maintains shape after extension — no sagging or collapse.
Versatile
Aluminium version for HVAC applications, PVC version for general ventilation and exhaust.
ISO 9001:2015 Certified
Quality management system certified by IGC, covering all stages from raw material to final delivery.
SMACNA & DW144 Compliant
Manufactured to the latest edition of SMACNA HVAC Duct Construction Standards and DW144.
Custom Sizes Available
Non-standard dimensions manufactured to project specifications with competitive lead times.
Approved by Leading Consultants
Accepted by Dar Al-Handasa, ECG, SYSTRA, Khatib & Alami and 25+ major engineering consultants.
Specifications
Technical Specifications
| Parameter | Value | Unit |
|---|---|---|
| Construction | Multi-ply aluminium laminate with spiral wire | — |
| Diameter Range | Ø50 to Ø500mm | mm |
| Standard Length | 10m (compressed to ~1.5m for shipping) | m |
| Temperature Range (AL) | -30°C to +140°C | °C |
| Temperature Range (PVC) | -10°C to +60°C | °C |
| Max Velocity | 10 m/s | m/s |
| Max Pressure | 2000 Pa | Pa |
| Fire Rating | Class 1 per UL 181 | — |
| Compression Ratio | 7:1 (compressed for transport) | — |
| Compliance | UL 181 / SMACNA | — |
Applications
Fields of Application
General ventilation connections
Exhaust fan connections
Range hood ducts
Dryer venting
Temporary ventilation during construction
Residential HVAC distribution
Quality Assurance
Tests & Certificates
Duct Test
Rigorous leakage and pressure testing to SMACNA and DW144 standards.
Duct Test 01
Duct Test 02
Duct Test 03
Air Tests
Air velocity and distribution testing.
Air Test 01
Air Test 02
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