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Model FLD-S-UD is a UL 555 classified Fusible Link Multi Blade fire damper with 3V style blades. It is designed for closure of the HVAC duct opening in Fire situations. It is UL555 classified for 90 min. Fire rating under Dynamic Conditions. Model FLD-S-UD can be installed vertically, with blades running horizontally with airflow in either direction.

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