51BVS-SS / 51BHS-SS Stainless Steel Type B Static Fire Damper

The 51BVS-SS/51BHS-SS is UL/ULC certified for use as a 1-1/2 hour static fire damper in HVAC systems.

The 51BVS-SS/51BHS-SS is the stainless steel variant of the Type B static fire damper, designed for installation in fire-rated assemblies where corrosion resistance is required, such as commercial kitchens, laboratories, coastal facilities, and other high humidity or chemically aggressive environments. The Type B configuration positions the blades above the direct airflow path, making it suitable for applications where the duct transitions into the fire separation at a different elevation. The interlocking curtain blade closes under spring tension when the fusible link releases, providing a reliable passive fire barrier at duct penetrations.