Industrial Tunnel Dampers
KBE FLOWPRO Industrial Tunnel Dampers are heavy-duty, flanged-frame On/Off dampers designed for demanding tunnel, railway and transit ventilation applications. Featuring double-skin airfoil blades, opposed blade operation and corrosion-resistant sealing components, they provide reliable airflow isolation, high mechanical strength and controlled air leakage under demanding operating conditions. Available in 250 and 400 Series, with different thermal resistance capabilities and construction specification Road tunnels, railway tunnels, metro systems, transit ventilation and industrial ventilation systems. The design can be customized to meet specific project requirements and technical specifications.
Technical Specifications
| Product Type | Industrial Tunnel Damper |
|---|---|
| Model | MBD |
| Series | 250 and 400 |
| Operation | On/Off |
| Blade Operation | Opposed Blades |
| Thermal Rating 400 Series | -400°C for 2 Hours (as specified) |
| Thermal Rating 250 Series | 300°C for 2 Hours After Thermal Shock from -5°C to 300°C |
| Fire Rating | BS 476-20 for 4 Hours |
| Leakage Classification | UL 555S Class I |
| Mounting | Horizontal or Vertical |
| Maximum Pressure | 24 in. W.G. |
| Maximum Velocity | 5000 FPM |
| Frame Material | Galvanized Steel |
| 400 Series Frame | 200 x 3 mm |
| 250 Series Frame | 200 x 2 mm |
| 400 Series Blade | 2 mm Double-Skin Airfoil |
| 250 Series Blade | 1.5 mm Double-Skin Airfoil |
| Bearings | Oil-Impregnated Sintered Bronze |
| Axles | 304 Stainless Steel |
| Linkage | 304 Stainless Steel |
| Blade Seals | Silicone-Impregnated Glass Fiber |
| Jamb Seals | Corrosion-Resistant Stainless Steel |
| Minimum Size | 300 x 300 mm |
| Maximum Single Size | 2500 x 2500 mm |
| Maximum Blade Length | 1000 mm |
| Multiple Section | Available |
| Optional Material | SS304 or SS316L |
| Actuator | Electric, Electro-Hydraulic or Pneumatic |
| Actuator Voltage | 230V, 120V or 24V |
| Actuator Type | Spring Return or Non-Spring Return |
| Limit Switches | Open/Close Position Monitoring |
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