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Motorized Fire Dampers - UL555

MFD - GB 20, Galvanized Steel Construction
3V Single Skin Blades; Static / Dynamic
Fire Rating : 1.1/2 Hr./ 3 Hrs.
Models: MFD-GB-21A ; MFD-GB-21AH ; MFD-GB-21AD.

MFD B-20 Series is a high performance UL 555 Classified with 1.1/2 hr. / 3hr. rating Motorized fire damper, to ensure lowest resistance to airflow in HVAC systems with velocities to 2000 fpm (10.2 m/sec.) and 4” w.g. (1000Pa) may be installed vertically or horizontally (with blades running horizontally) and is rated for airflow and leakage in either direction.

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Motorized Fire Dampers - UL555

MFD - GB 20, Galvanized Steel Construction
3V Single Skin Blades; Static / Dynamic
Fire Rating : 1.1/2 Hr./ 3 Hrs.
Models: MFD-GBB-21A ; MFD-GBB-21AH ; MFD-GBB-21AD.

MFD B-20 Series is a high performance UL 555 Classified with 1.1/2 hr. / 3hr. rating Motorized fire damper, to ensure lowest resistance to airflow in HVAC systems with velocities to 2000 fpm (10.2 m/sec.) and 4” w.g. (1000Pa) may be installed vertically or horizontally (with blades running horizontally) and is rated for airflow and leakage in either direction.

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Motorized Fire Dampers - UL555
With out sleeve
MFD - GB 20, Galvanized Steel Construction
3V Single Skin Blades; Static / Dynamic
Fire Rating : 1.1/2 Hr./ 3 Hrs.
Models: MFD-GB-21A ; MFD-GB-21AH ; MFD-GB-21AD.

MFD B-20 Series is a high performance UL 555 Classified with 1.1/2 hr. / 3hr. rating Motorized fire damper, to ensure lowest resistance to airflow in HVAC systems with velocities to 2000 fpm (10.2 m/sec.) and 4” w.g. (1000Pa) may be installed vertically or horizontally (with blades running horizontally) and is rated for airflow and leakage in either direction.

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Motorized Fire Dampers with DTRD - UL555

MFD - SBF / GBF 20,
Stainless Steel / Galvanized Steel Construction

3V Single Skin Blades; Static / Dynamic
Fire Rating : 1.1/2 Hr./ 3 Hrs.
Models: MFD-SBF-21A ; MFD-SBF-21AH :
MFD-GBF-21A ; MFD-GBF-21AH
MFD SBF / GBF -20 Series is a high performance UL 555 Classified with 1.1/2 hr. / 3hr. rating Motorized fire damper, to ensure damper closing with DTRD - dual heat response with melting fuse and TRD, may be installed vertically or horizontally (with blades running horizontally) with fire resistance rating in either direction.

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