Round Ventilation Bend 90°
The indicated price is valid ordering till 12.09.2026.
Circular Ventilation Bends 90° (Elbows)
Circular 90-degree ventilation bends (elbows) are critical components utilized to execute right-angle directional changes within a ducting layout. These round ventilation bends enable compact routing in technical plant rooms, vertical ventilation shafts, or confined spaces above suspended ceilings. Our online catalog features premium factory-manufactured round duct elbows that undergo mandatory internal leak-testing, available from stock or via rapid custom manufacturing with direct delivery across the EU.
Depending on the specific aerodynamic layout and connection diameters, these 90-degree elbows are fabricated using two distinct engineering methods:
- Pressed (Die-Drawn) Elbows: Supplied for small and medium-sized networks with diameters ranging from 80 mm to 200 mm (including the widely used 150 mm size). Due to the automated deep-drawing process, these components are entirely seamless, boasting an ultra-smooth internal wall that significantly minimizes airflow resistance and localized turbulent noise.
- Segmented (Gored) Bends: Recommended for medium to large-scale industrial mainlines with diameters from 250 mm to 1000 mm. Assembled from individual calibrated steel segments, they are bonded on precision machinery via continuous linear seam welding and tight mechanical lock seams, ensuring maximum structural rigidity against high static pressure.
Design Modifications & Technical Advantages
The technical properties of our 90-degree galvanized bends are focused on accelerating on-site installation while protecting the structural integrity of the ventilation network:
- Flexible Airtightness Configurations: Available as fully sealed models equipped with factory-fitted rubber gaskets for high-density requirements, or as economical non-sealed profiles for standard extract or supply systems.
- EPDM Rubber Seal: On airtight models of small and medium diameters, the rubber seal is securely fixed by a rolled edge. For large-diameter bends (from 400 mm), the sealing rubber is fitted manually onto the collar, providing the necessary tightness during installation.
- Edge Features: For diameters under 400 mm, folded edge technology (SAFE) is applied, which increases the rigidity of the rim and makes installation safer. Products of 400 mm and above feature a standard straight edge.
Dimensions & Technical Specifications
Our 90-degree ventilation elbows are fully standardized to ensure 100% component compatibility with standard circular air ducts.
Pressed 90° Elbows (Sizes 80 - 200 mm)
| Nominal Diameter Ød (mm) | Radius / Extension A (mm) | Collar Height H (mm) | Average Weight (kg) |
|---|---|---|---|
| 80 | 100 | 35 | 0.27 |
| 100 | 100 | 35 | 0.35 |
| 125 | 125 | 35 | 0.52 |
| 150 | 150 | 35 | 0.71 |
| 160 | 160 | 35 | 0.83 |
| 200 | 200 | 35 | 1.27 |
Segmented 90° Bends (Sizes 250 - 1000 mm)
| Nominal Diameter Ød (mm) | Radius / Extension R (mm) | Collar Height H (mm) | Average Weight (kg) |
|---|---|---|---|
| 250 | 250 | 45 | 0.69 |
| 315 | 315 | 45 | 2.36 |
| 355 | 355 | 45 | 3.01 |
| 400 | 400 | 45 | 3.85 |
| 450 | 450 | 45 | 4.61 |
| 500 | 500 | 55 | 7.65 |
| 560 | 560 | 55 | 8.38 |
| 630 | 630 | 55 | 12.74 |
| 710 | 710 | 55 | 14.72 |
| 800 | 800 | 100 | 22.04 |
| 900 | 900 | 100 | 35.10 |
| 1000 | 1000 | 100 | 42.64 |
Applications & Installation Guidelines
Galvanized steel elbows are perfectly adapted for rapid integration into any matching air distribution infrastructure:
- Standard Male Fitting Integration: All elbows feature a calibrated male connection profile where the collar's outer diameter is downsized to slide directly inside a standard circular duct. When linking an elbow directly to another fitting (such as a tee or reducer), a female coupling (sleeve connector) is required.
- Joint Fastening & Sealing: Secure the overlapping connection node using standard aluminum rivets or self-tapping screws. To maximize airtightness, wrap the assembly joint with self-adhesive aluminum duct tape.
- Transport Protection: Bends are shipped in rigid cardboard boxes (small sizes) or arranged on pallets wrapped in heavy-duty stretch film (large sizes), mitigating job-site contamination or accidental impact damage.
Material Specifications & Quality Compliance
- Certified Raw Materials: Fabricated using premium structural DX51D grade galvanized steel with a continuous zinc protective finish of Z275 (275 g/m²), offering excellent resistance to rust under conditions of standard relative humidity.
- Automated Micro-Gap Stitch Welding: Longitudinal seams of segmented segments are treated with fully automated linear seam welding, leaving the protective properties of the zinc completely intact along the heat-affected line.
- Wall Thickness and Calibration: Selected according to the product diameter to maintain stable geometry of the ventilation line. The main parameters, insertion depth, and bending radius (R = D) are calculated for convenient and reliable coupling with straight duct sections.
