Fire damper FDH

Type approved by most recognized classification societies, class H0(H120) fire damper when suitably insulated. Pre-insulated H0(H60) with ceramic wool at the factory. H0(H120) with additional insulation on site.Blades insulated with ceramic wool Blades contain stainless spring steel seals for low leakage in normal conditions and thermal expansion graphite seals (effective from 150 ºC) to seal the damper in case of fire Closed damper fulfills the requirement of leakage class 3 (EN1751:2014) for size > 300x300 mm. Casing leakage class C. Fixed frame and blades of stainless steel Available as ATEX certified (Q1/2019) Nominal fuse release temperature 50 ºC, 74 ºC or 100 ºC. Other temperatures available. With automatic electrical or pneumatic operation system Maximum duct pressure for damper construction 5000 Pa and maximum air velocity 15 m/s Halton FDH fire and gas dampers are type-approved class H0(H120) fire and gas dampers for use in offshore and onshore ventilation systems. FDH dampers are used to protect the integrity of bulkheads and decks where they are penetrated by ventilation ducts. The Halton FDH dampers can be installed in rectangular or circular ducts. Dampers have a fusible link and they prevent the spread of fire and gases within the ventilation ductwork. When the blades are in a open position, the device does not cause significant pressure loss, noise or flow disturbance. An open-closed beacon is visible on the outside of the damper.