Brand
Navajyothi Air Flow
Model
NJ-Alu Round Diffuser
Application
Supply and return air distribution for HVAC ventilation and air-conditioning systems.
Product Description
The Aluminium Round Diffuser (ARD) is a circular ceiling-mounted air terminal designed for efficient supply and exhaust air distribution in HVAC systems. Manufactured from high-quality extruded aluminium alloy, it provides a uniform 360° radial air pattern, ensuring excellent air mixing, low noise levels, and occupant comfort. The diffuser is suitable for commercial, residential, healthcare, hospitality, and industrial applications.
Material Construction & Technical Specifications
| Parameter | Specification |
|---|---|
| Product Name | Aluminium Round Diffuser (ARD) |
| Material | Extruded Aluminium Alloy |
| Construction | Precision fabricated concentric cone design |
| Frame Thickness | 1.2–1.5 mm |
| Core Type | Removable Concentric Cone |
| Core Thickness | 1 mm |
| Air Discharge Pattern | 360° Radial Horizontal |
| Application | Supply Air / Exhaust Air |
| Standard Neck Sizes | Ø150, Ø200, Ø225, Ø250, Ø300, Ø375, Ø450 mm |
| Mounting | Ceiling |
| Damper Option | 2 flap Butterfly collar damper |
| Finish | Smooth Powder Coated / Natural Anodized |
| Powder coating colours | Broken White as standard, any other RAL Shades |
Construction Features
- Outer ring and inner rings are made from high quality extruded aluminum with powder coated color finish.
- Core can be easily removable and changeable to allow for maximum flexibility in installation, maintenance and damper adjustment.
- The round diffuser may be used as supply or return air diffuser according to the application design. Supply round diffuser and return round diffuser can be supplied with damper to control static pressure and the air volume flow rate.
- Foam gasket is sealed around the back of the frame as option to avoid air leakage.
Optional Accessories
- 2 Flap Butterfly Damper
- Round collar dampers
- Plenum Box
- Foam Gasket
- Mounting Collar
Applications
- Commercial Office Buildings, Shopping Malls, Hotels & Resorts, Hospitals
- Airports, Educational Institutions, Restaurants, Villas
- Conference Rooms, Industrial Buildings, HVAC Supply & Exaust Air Systems
With Damper Closed
With Damper Open
Standard sizes Data :
| Size | A (mm) | B (mm) | C (mm) |
|---|---|---|---|
| 150 Φ | 145 | 200 | 250 |
| 200 Φ | 195 | 270 | 320 |
| 225 Φ | 220 | 285 | 340 |
| 250 Φ | 245 | 300 | 365 |
| 300 Φ | 295 | 350 | 405 |
| 375 Φ | 370 | 425 | 475 |
| 450 | 445 | 510 | 560 |
| Material of Construction | |
|---|---|
| Outer Frame | 1mm thick Aluminium Sheet |
| Center Core Rings | 1mm thick Aluminium Sheet |
| Center Core | 1mm thick Aluminium Sheet |
| Dimensions in mm | |||
|---|---|---|---|
| Nominal Dia |
ØA | ØB | ØC |
| 160 | 159 | 213 | 244 |
| 200 | 199 | 264 | 284 |
| 250 | 249 | 315 | 333 |
| 315 | 314 | 366 | 397 |
| 355 | 354 | 417 | 438 |
| 400 | 399 | 468 | 482 |
| 450 | 444 | 510 | 553 |
Dimensions
Performance data Table :
| Diffuser Size (Ø mm) | Airflow (CMH) | Airflow (CFM) | Airflow (L/s) | Neck Velocity (m/s) | Pressure Drop (Pa) | Throw (m) | Sound Rating |
|---|---|---|---|---|---|---|---|
| Ø150 | 100–180 | 59–106 | 28–50 | 1.6–3.2 | 8–18 | 2.5–4.0 | NC 20–25 |
| Ø200 | 180–300 | 106–177 | 50–83 | 1.8–3.0 | 8–20 | 3.0–5.0 | NC 20–25 |
| Ø225 | 250–400 | 147–236 | 69–111 | 1.9–3.2 | 10–22 | 3.5–5.5 | NC 20–30 |
| Ø250 | 300–500 | 177–295 | 83–139 | 1.8–3.1 | 10–25 | 4.0–6.0 | NC 20–30 |
| Ø300 | 450–750 | 265–442 | 125–208 | 1.9–3.1 | 12–28 | 4.5–7.0 | NC 25–30 |
| Ø375 | 650–1,050 | 383–618 | 181–292 | 1.7–2.8 | 12–30 | 5.5–8.0 | NC 25–35 |
| Ø450 | 900–1,400 | 530–824 | 250–389 | 1.6–2.8 | 15–35 | 6.0–9.0 | NC 25–35 |