Greenheck Fan - FSD-311V
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Z3 GREENHECK _ Model FSD 311V Combination FIRE SMOKE DAMPERS APPLICATION Model FSD 311V is a vertical blade class I leakage rated combi nation fire smoke damper High strength airfoil blades ensure the lowest resistance to airflow in HVAC systems with velocities to 4000 fpm 20 3m s and 4 in wg 1 0 kPa RATINGS UL 555 Fire Resistance Rating Fire Rating 1 V 2 hours Dynamic Closure Rating Actual ratings are size dependent Max Velocity up to 4000 fpm 20 3 m s Max Pressure 4 in wg 1 kPa UL555S Leakage Rating Leakage Ciass I Operational Rating Actual ratings are size dependent Max Velocity up to 4000 fpm 20 3m s Max Pressure 4 in wg 1 kPa Maximum Temperature 350 F 177 C depending upon the actuator STANDARD CONSTRUC ...