FD-C Series circular single-blade, externally resettable combination fire and volume control dampers are designed to stop the spread of fire and smoke through circular ductwork penetrating fire-rated walls, floors, ceilings, and cavity barriers.
Classified to ES rating (BS EN 1366-2), the FD-C Series provides reduced smoke leakage performance and is available in sizes from 100 mm to 315 mm diameter.
For straightforward installation, the damper can be fitted from a single side of the fire-separating barrier, without requiring fire-rated infill material.