UL-555 Classified Fire Damper B-20 Series FD-SB-22-A

Model :FD-GB/SB/GSB/SGB-22-A/B/AS/BS/R UL 555
Damper meets the required standards of SMACNA,
NFPA, IBC, BOCA, ICBO, UL.

Standard Construction
Frame: 20 gauge (0.9 mm) thick galvanized steel / stainless steel
Blades: Curtain type blade made of 22 gauge (0.8 mm) thick galvanized steel / stainless steel.
Fusible Link:  165°F.
Blade Ramp:  16 gauge (1.5 mm) thick galvanized steel / stainless steel angle.
Spring:  0.3 mm thick by 19 mm wide, stainless steel constant force spring.
Mounting:  Vertical

Optional Fittings

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.
Retaining Angles: 1½” x 1½” x 16 gauge (40 x 40 x 1.5) mm.
Limit Switches: For BMS open / close indication.
Transitions (R): Neck adapter for round duct connections