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

Model : FD-GB-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: 0.3 mm thick by 19 mm wide, stainless steel constant force spring.
Mounting: Vertical / Horizontal
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