These dampers are used as a shut-off device within channels and technical shafts in order to separate ventilation zones. Their design offers a large free space for air flow and therefore enables a flow rate with minimized pressure loss.

• Temperature range: 250°C
• Pressure-resistant: up to 4.000Pa
• Material: galvanized steel and stainless steel
• Dimensions: up to 7m radius
• Exact execution according to tunnel profile
• Minimize of load to supporting surface via suspension within the tunnel profile