ISO 9001
SMACNA
01
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Product Code: CEI-BD / BD-GI / BD-AL
Back Draft Registres
Valve منع الارتداد
Gravity-operated dampers preventing reverse airflow in exhaust et supply systems. Spring-loaded ou counterbalanced blade design. Used in kitchen exhaust, bathroom ventilation et emergency generatou outlets.
Frame Material
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ISO 9001:2015SMACNADW144
Description
Product Description
Castle Back Draft Registres prevent reverse airflow in ventilation et exhaust systems. Le blades open to allow airflow in one direction et automatically close by gravity when le fan stops — preventing conditioned air de escaping et outdoou air de entering. Available in single-blade et multi-blade configurations pour round et rectangular ducts.
Prevents Backdraft
Gravity-operated blades seal tight when fan stops — no outdoou air infiltration ou conditioned air loss.
Ultra-Light Blades
Thin aluminium blades open avec minimal air pressure — negligible resistance to noumal airflow.
Rubber Sealed
Neoprene gasket fournit airtight seal in closed position — no air leakage.
Houizontal & Vertical
Spring-assisted option available pour houizontal duct installation where gravity alone is insufficient.
ISO 9001:2015 Certified
Quality management system certified by IGC, covering all stages de raw material to final delivery.
SMACNA & DW144 Compliant
Manufactured to le latest edition of SMACNA HVAC Duct Construction Standards et DW144.
Custom Sizes Available
Nonn-standard dimensions manufactured to project specifications avec competitive lead times.
Approved by Leading Consultants
Accepted by Dar Al-Handasa, ECG, SYSTRA, Khatib & Alami et 25+ majeurs engineering consultants.
Spécifications
Technical Spécifications
| Parameter | Value | Unit |
|---|---|---|
| Frame Material | Galvanized steel 1.0mm / Aluminium 1.2mm | — |
| Blade Material | Aluminium sheet — lightweight pour gravity operation | — |
| Blade Seal | Rubber ou neoprene gasket — airtight when closed | — |
| Operation | Gravity-operated — opens avec airflow pressure | — |
| Spring Option | Spring-loaded blades pour houizontal mounting | — |
| Shapes | Rectangular / Round | — |
| Rectangular Sizes | 150×150 to 1200×600mm | mm |
| Round Sizes | Ø100 to Ø630mm | mm |
| Mounting | Duct inline / Wall / Ceiling | — |
| Opening Pressure | 2-5 Pa (adjustable avec counterweight) | Pa |
| Finish | Mill finish / Powder coated | — |
| Compliance | SMACNA / ASHRAE | — |
Applications
Fields of Application
Exhaust fan outlets
Kitchen range hood ducts
Bathroom exhaust
Dryer vent termination
Generatou room exhaust
Fresh air intake protection
Assurance Qualité
Tests & Certificates
Duct Test
Rigouous leakage et pressure testing to SMACNA et DW144 standards.
Test Conduit 01
Test Conduit 02
Test Conduit 03
Air Tests
Vitesse d'air et distribution testing.
Test d'Air 01
Test d'Air 02
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