FSD-B-U / FSD-A-U Fire and smoke dampers.
UL Approval
Construction details:
Maximum levels of operation:
Design and manufacture details FSD-B-U / FSD-A-U dampers
Damper frame or casing material
Galvanised steel
Damper frame or casing thickness
1.6 mm
Damper frame or casing profile type
Omega profile – 123 mm thick
Closing blade material
Galvanised steel
Closing blade thickness
1.6 mm
Closing blade type
Type triple V
Sealing. Airtightness
Integrated gasket in the casing or frame
Damper shaft bearings
Bronze casing pressed into the casing or frame
Damper shaft material
Sheet steel
Airtight seal in the interior of the damper
Stainless steel - metal flexible under compression
Airtight seals on blades
Silicone (FSD-B-U model)
Thermal ac opening and
closing servomotor
Thermal actuator (thermoelectric fusible link) that operates at
temperatures above 74 ºC.
Electric servomotor
24V, with auxiliary changer (230 V option)
Damper exterior enclosure
Minimum 432 mm, thickness 1 mm. Galvanised steel.
Levels of operation:
Description
FSD-A-U/FSD-B-U models
UL 555S leak classification
Class 1 (FSD-B-U) and Class 3 (FSD-A-U)
UL 555 fire resistance classification
90 minutes (1.5 h)
Maximum velocity
10 m/s
Maximum pressure
1000 Pa
Series FSD-FLD
3
