| Rectangular duct system
Rectangular 45° Bend
Product Description
The rectangular 45° bend is a ventilation fitting used for smoothly changing the direction of the air channel. Unlike the 90° elbow, this element creates less aerodynamic resistance, reducing noise and load on fans. The item is used when bypassing obstacles (beams, columns) or when a route axis shift is required.
The standard inner radius of curvature is 150 mm, ensuring optimal compactness while maintaining good aerodynamic properties. The bend is fully compatible with straight air ducts.
Key Features
- Angle versatility: The standard version is 45 degrees. However, upon request, we manufacture bends with any turning angle (e.g., 15°, 30°, 60°), allowing any geometric problem on site to be solved.
- Design: The bends are equipped with pre-installed flanges (Euro-profile) for quick bolt assembly. The flange size (20, 30, or 40 mm) is selected automatically depending on the cross-section, ensuring frame rigidity.
- Materials: The standard version uses DX51D+Z275 galvanized steel. For specific tasks (food industry, design projects), manufacturing from stainless steel (AISI 304/316) or powder coating in RAL colors is available.
Specifications and Dimensions
Below are the articles for standard square cross-sections. We manufacture any dimensions from 100x100 to 2000x2000 mm.
Dimensions (45° angle)
| Size (mm) |
Article |
| 100 x 100 |
VKSL45010010 |
| 200 x 200 |
VKSL45020020 |
| 300 x 300 |
VKSL45030030 |
| 400 x 400 |
VKSL45040040 |
| 500 x 500 |
VKSL45050050 |
| 600 x 600 |
VKSL45060060 |
| 700 x 700 |
VKSL45070070 |
| 800 x 800 |
VKSL45080080 |
| 900 x 900 |
VKSL45090090 |
| 1000 x 1000 |
VKSL45100100 |
Technical Parameters
| Bend angle |
45° (standard). 15°, 30°, 60° available on request. |
| Radius (R) |
150 mm (standard inner radius) |
| Metal thickness |
0.5 – 0.9 mm (according to EN 1505) |
| Connection type |
Flange 20 mm (B ≤ 1500 mm), Flange 30 mm (1500 < B ≤ 2000 mm) |
| Production time |
Custom orders: 3–10 business days. |
Installation Recommendations
- Sealing: Corner joints are most susceptible to air leaks. When assembling flanges, always use sealing tape or sealant.
- Fastening: Additional aerodynamic loads occur in the turning zones of the route. It is recommended to install suspensions (profile + threaded rod) in the immediate vicinity of the bend.
- Accessories: To assemble, you will need M8/M10 bolts and nuts, as well as mounting clamps for tightening flanges (if the section side exceeds 300 mm). All of this is available in the mounting materials section.
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