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UL555 Certified Fire Smoke Damper model FSD-311 is a high performance combination fire smoke damper withClass I leakagewith 1 1/2 hrs fire resistance rating. High strength airfoil blades ensure the lowest resistance to airflow in HVAC systems with velocities to 4000 fpm (20.3 m/s) and pressures to 8 in. wg (2 kPa).
FSD-311 is available with high performance, fast acting spring return electric actuator / motor with fail-safe function and auxiliary switch for position indication. Actuator can be offered with 24V AC / DC or 230V AC power supply option.
Model FSD-311 may be installed vertically (with blades running horizontal) or horizontally and is rated for airflow and leakage in either direction.
Model FSD-311 meets the requirements for fire dampers, smoke dampers and combination fire smoke dampers established by:
Vinod Gogoriya (EK Engineering)
Near Vyas public school, Purani Ginani, rnBikaner, Old ginani, Rajasthan - 334001
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