Type : Fire Damper
Fire Rating : 21 Series: 1½ hour
Construction : Galvanized Steel (GI)
Fire Rating : 1½ hrs.
18 gauge (1.2 mm) thick galvanized steel.
Curtain type blade made of 22 gauge (0.8 mm) thick galvanized steel.
16 gauge (1.5 mm) thick galvanized steel angle.
0.3 mm thick by 19 mm wide constant force spring formed from stainless steel.
Vertical / Horizontal
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.
1½” x 1½” x 16 gauge (40 x 40 x 1.5) mm.
For BMS open / close indication.
Neck adapter for round duct connections.
Frame : Stainless Steel 18 gauge (304/316L)
Blade : Stainless Steel 22 gauge (304/316L)
Model : FD-GB-21-A/AS/B/BS/R UL 555 Damper meets the required standards of SMACNA, NFPA, IBC, BOCA, ICBO, UL.