Round Air Regulating Damper with motorised control
The indicated price is valid ordering till 12.09.2026.
Round Motorized Air Regulating Damper
A round galvanized steel motorized air regulating damper (AGRJ-M Series) is a precision-engineered HVAC component designed for the automated balancing, modulation, and fine-tuning of air volumes within circular duct networks. By replacing manual levers with a standardized actuator-ready platform, this regulating valve enables direct integration into modern Building Management Systems (BMS) or smart ventilation automation controls. It resolves the critical challenge of uneven airflow distribution across separate duct runs, dynamically shifting air supply or extraction parameters based on active demands from temperature, humidity, or CO2 sensors, thereby eliminating manual maintenance overloads and minimizing energy waste.
The structural casing and internal regulating blade are manufactured on high-speed automated lines from industrial-grade structural galvanized sheet steel, grade DX51D, carrying a dense protective hot-dip zinc coating mass of Z275 (275 g/m²). To ensure absolute geometric stability and prevent casing warping under constant system static pressure, the longitudinal body seam is fused via continuous automated linear seam welding. The blade is engineered to adjust air distribution smoothly, featuring a non-sealed margin configuration (Blade Leakage Class 0) that facilitates clean volumetric throttling without any risk of friction friction-locks or thermal degradation of rubber edges under heavy service cycles.
Key Benefits of the Motorized Air Regulating Damper
- Seamless automated airflow management: The integrated heavy-gauge mounting bracket and calibrated drive shaft guarantee total mechanical compatibility with standard electrical actuators from major global HVAC automation brands, eliminating the need for custom job-site adapters.
- Safe volume throttling and fan protection: Designed with an unsealed Class 0 blade leakage profile, the metal butterfly disc preserves a calculated structural clearance when driven to the maximum closed position. This prevents dangerous static pressure buildups inside the air track, protects fan motors from thermal overload, and maintains a necessary baseline ventilation exchange rate.
- Elevated installation platform for insulation wrapping: The actuator mounting base is raised on a rigid 50 mm metal standoff frame. This intentional clearance ensures insulation crews can easily apply external mineral wool blankets or foil cladding jackets around the duct line without blocking the structural rotation or gear travel of the motorized drive unit.
- Airtight casing design for lower pressure losses: The automated linear seam-welded steel casing meets rigid European Class C tightness standards (ATC 3 rating). This completely prevents unwanted air leakage through the body shell, maintaining the project's design pressure and optimizing fan power consumption.
- Comprehensive size spectrum for any project scale: The manufacturing dimension matrix accommodates nominal duct cross-sections from 100 mm up to 1000 mm. This extensive range allows mechanical engineering teams to implement identical automated modulation nodes across small commercial zones and heavy industrial facilities.
Technical Specifications and Dimensional Data
The linear dimensions, diameter calibrations, and engineering construction tolerances of the AGRJ-M series fully comply with European standard EN 1506:2007 for circular sheet metal air ducts and fittings. The unit is shipped ready for motorized drive installation.
| Nominal Diameter Ød (mm) | Collar Insertion Depth L1 (mm) | Total Casing Length L (mm) | Cross Section Area (m²) | Product Weight (kg) |
|---|---|---|---|---|
| 100 | 40 | 156 | 0.01 | 0.7 |
| 125 | 40 | 156 | 0.01 | 0.9 |
| 160 | 40 | 156 | 0.02 | 1.1 |
| 200 | 40 | 156 | 0.03 | 1.4 |
| 250 | 40 | 196 | 0.05 | 2.1 |
| 315 | 40 | 246 | 0.08 | 3.1 |
| 355 | 65 | 293 | 0.10 | 4.8 |
| 400 | 65 | 330 | 0.13 | 5.9 |
| 450 | 65 | 370 | 0.16 | 7.2 |
| 500 | 65 | 397 | 0.20 | 8.6 |
| 560 | 65 | 457 | 0.25 | 11.0 |
| 630 | 65 | 507 | 0.31 | 13.0 |
| 710 | 65 | 568 | 0.40 | 17.0 |
| 800 | 65 | 610 | 0.50 | 21.0 |
| 900 | 100 | 836 | 0.64 | 26.0 |
| 1000 | 100 | 836 | 0.79 | 32.0 |
- Casing Airtightness Profile: Fully compliant with Class C / ATC 3 requirements
- Blade Leakage Profile: Unsealed regulating layout, Class 0 airtightness rating
- Base Material Profile: Structural galvanized sheet steel DX51D (Z275 passivation coating)
- Optional Materials: Available in stainless steel configurations (AISI 304 or AISI 316) upon request
- Actuator Compatibility: Suited for all standard actuators matching the 50 mm installation platform
- Drive Inclusion: Electric actuator is not included in the baseline product delivery and must be sourced separately
Recommended Assembly and Drive Configuration Guidelines
Mount the regulating damper within air track segments that offer adequate clearance for subsequently fastening the electric actuator, routing control/power cabling, and executing routine maintenance checks. The male-profile connection collars slide directly inside standard straight spiral-wound or longitudinal round ducts. Secure the overlapping connection perimeter mechanically using blind structural rivets or self-tapping sheet metal screws. External joint seams must be wrapped with high-adhesion aluminum duct tape to preserve the network design leakage category. If the installation requires joining the regulating damper directly to another molded configuration item (such as an elbow or a tee), a female sleeve coupling connector must be used to bridge the male ports.
