UL-555 Classified Fire Damper B-20 Series FD-GBD-20-AS

Model : FD-GBD-20-AS/BS/AF/BF/R UL 555 Damper
meets the required standards of SMACNA, NFPA, IBC,
BOCA, ICBO, UL.

Standard Construction

Frame:  18 gauge (1.2 mm) thick galvanized steel.
Blades: Curtain type blade made of 22 gauge (0.8 mm) thick galvanized steel.
Fusible Link:  165°F.
Blade Ramp: 16 gauge (1.5 mm) thick galvanized steel angle.
Spring:  0.33 mm thick by 19 mm wide, stainless steel constant force spring.
Mounting : Vertical
Sleeve: Minimum 0.7 mm, single section is field or factory installed.
Multiple section is factory installed.
Sleeve thickness as per NFPA table 3-4.6.3.

Optional Fittings

Retaining Angles: 1½” x 1½” x 16 gauge (40 x 40 x1.5) mm.
Limit Switches: For BMS open / close indication.
Transitions (R): Neck adapter for round duct connections.