Product
Aluminium Round Louver (ARL)
Brand
Navajyothi Air Flow
Application
Supply and return air distribution for HVAC ventilation and air-conditioning systems.
Product Description
The Aluminium Round Louver (ARL) is designed for efficient supply, exhaust, and fresh air ventilation in HVAC systems. Manufactured from high-quality extruded aluminium, it features fixed radial blades that provide uniform airflow while preventing the entry of rain, birds, insects, and debris. The circular design makes it ideal for duct terminations, external wall installations, and ventilation openings in commercial, industrial, and residential buildings.
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Type | Aluminium Round Louver |
| Material | Extruded Aluminium |
| Construction | Circular frame with fixed radial blades |
| Frame Thickness | 1.2 mm |
| Frame width | 30 mm face / 20 mm back side |
| Frame depth | 40 mm |
| Blade Thickness | 1.0–1.2 mm |
| Blade Type | Fixed type |
| Blade spacing | 40 mm |
| Blade Angle | 45° |
| Sizes | 100, 150, 200, 250, 300, 350, 400, 450 mm as standard |
| Other sizes | Custom diameters are available on request |
| Finish | Smooth Powder Coated Finish |
| Standard Colour | RAL 9010 White |
| Optional Finish | Mill Finish, Anodized, Custom RAL Colours |
| Mounting | Wall or Duct Mounting |
| Fastening | Concealed or Exposed Screw Fixing |
| Bird Screen | Optional Aluminium / GI Bird Mesh |
| Insect Screen | Optional Mesh |
Construction Features
- Premium extruded aluminium alloy construction
- Circular frame with fixed radial blades
- Low pressure drop for energy-efficient airflow
- Corrosion-resistant powder-coated finish
- Suitable for indoor and outdoor applications
- Optional bird screen and insect mesh
- Custom sizes and finishes available
Applications
- Toilet & Bathroom Ventilation, Kitchen Exhaust, Generator Rooms
- Electrical Rooms, Mechanical Ventilation, Commercial Buildings
- Industrial Plants, Warehouses, Residential Buildings
Standard Performance Data Table
| Neck Diameter (mm) |
Overall Diameter (Approx. mm) |
Airflow Range (CFM) |
Recommended Airflow (CFM) |
Face Velocity (m/s) |
Pressure Drop (Pa) |
Noise Level (NC) |
|---|---|---|---|---|---|---|
| 100 | 140 | 80–150 | 120 | 4.5 | 12 | ≤25 |
| 150 | 190 | 150–300 | 225 | 4.3 | 13 | ≤25 |
| 200 | 240 | 250–500 | 375 | 4.2 | 14 | ≤25 |
| 250 | 290 | 400–750 | 575 | 4.0 | 15 | ≤30 |
| 300 | 340 | 550–1000 | 775 | 3.9 | 16 | ≤30 |
| 350 | 390 | 700–1250 | 975 | 3.8 | 17 | ≤30 |
| 400 | 440 | 900–1550 | 1200 | 3.7 | 18 | ≤35 |