Fire dampers with fusible link, FLD-S-U /
FLD-S-UD. Approval UL
Description
The fire dampers are approved to withstand fire conditions for 90
minutes (1.5 hours) in accordance with UL555. They are 3V type
multi-blade operated by the melting of a fusible link calibrated to
74º C.
Fire dampers close automatically to prevent fire from
spreading to adjacent fire compartments through HVAC
ventilation ductwork.
The FLD-S-U model is fire rated under static conditions.
The FLD-S-U model is fire rated under dynamic conditions. It is
designed for system speeds of up to 10 m/s and pressure of up
to 1000 Pa.
The damper frame is constructed with reinforced corners.
Frame sizes under 425 mm high use low profile thin line frames.
The blades are reinforced with 3 “Vee’s” structurally designed
lengthways.
The FLD-S-U / FLD-S-UD models are installed vertically, with
the blades in a horizontal position, regardless of the direction of
the horizontal air flow.
FLD-S-U / FLD-S-UD
Fire damper with fusible link
FLD-S-U / FLD-S-UD
Fire damper with fusible link
Series FSD-FLD
6
