Fire Dampers
Static Fire Damper Systems
Static fire damper applications are where the HVAC systems fans are automatically shut down in the event of a fire and for use in air transfer openings in walls or partitions. The static-rated fire damper is only tested for use when there is no airflow present in the system.
All Duro Dyne static damper frames and blades are constructed with 22 gauge roll-formed galvanized steel and have replaceable 165°F or 212°F fusible links.
Dynamic Fire Damper Systems
Dynamic fire damper applications are where the HVAC systems remain operational in the event of a fire. In situations where the air distribution system continues to operate and moves air through the opening after smoke or heat from a fire has been detected, the damper must be labeled as a dynamic system damper that is capable of closing against airflow pressure. Dynamic dampers must be tested and labeled for closure under the HVAC system design airflow and operating pressure conditions.
All Duro Dyne A-DY, B-DY, C-DY, and D-DY dynamic damper frames and blades are constructed with 22 gauge roll-formed galvanized steel and have replaceable 165°F or 212°F fusible links. Duro Dyne FDD-MB-3V dynamic damper frames have a roll-formed galvanized steel hat section with staked corners and internal bracing. All FDD-MB-3V blades are constructed with 16 gauge roll-formed galvanized steel and have 165°F or 212°F fusible links.
Combination Fire/Smoke Dampers
Combination Fire/Smoke Dampers meet both the specific test standards for fire and smoke situations and are rated as combination fire and smoke dampers. A combination fire/smoke damper can close when heat from a fire is detected or when smoke is detected by a smoke detector.
Control dampers
Used to control airflow within a duct system. Roll-formed galvanized steel hat section with staked corners and integral bracing. Bronze oilite bearings press-fit into frame.
access doors
Facilitating safe access to ductwork. Hinged or Cam design.
Product Resources
View the Duro Dyne Damper Brochure Here: Duro Dyne Fire Damper Product Brochure
All Product Downloads below in Product Resources
CERTIFICATIONS
DuroDyne Fire Dampers are UL 555 approved and approved by the Standards and Appeals for use in New York City. Cal. 291-80-SA. Meets National Fire Protection Association – NFPA 90A.
UL CLassifed UL555 – Meets NFPA 90A Standards
Static Systems
UL10A – Blades in Airstream
1 1/2 Hour Fire Rating
Vertical Sizes: 4″ x 4″ to 60″ x 60″
Multi-selection up to: 120″ x 120″
Horizontal Sizes: 4″ x 4″ to 34″ x 60″
Multi-selection up to: 102″ x 60″
3 Hour Fire Rating
Vertical Sizes: 4″ x 4″ to 48″ x 48″
Horizontal Sizes: 4″ x 4″ to 40″ x 40″
Multi-selection up to: 80″ x 40″
UL10B – Blades Out Of Airstream
1 1/2 Hour Fire Rating
Vertical Sizes: 4″ x 3″ to 60″ x 60″
Multi-selection up to: 120″ x 120″
Horizontal Sizes: 4″ x 4″ to 34″ x 60″
Multi-selection up to: 102″ x 60″
100% Free Area
3 Hour Fire Rating
Vertical Sizes: 4″ x 4″ to 48″ x 48″
Horizontal Sizes: 4″ x 4″ to 40″ x 40″
Multi-selection up to: 80″ x 40″
100% Free Area
UL10C – Square Damper with Round Collars
1 1/2 Hour Fire Rating
Minimum Collar Size: 3″ Round, 5″ x 5″ Rectangular
Maximum Collar Size: 52″ Round, 58″ x 52″ Rectangular
100% Free Area
3 Hour Fire Rating
Minimum Collar Size: 3″ Round, 5″ x 5″ Rectangular
Maximum Collar Size: 52″ Round, 58″ x 52″ Rectangular
100% Free Area
UL10D – ThinLine – 2″ Deep
1 1/2 Hour Fire Rating
Vertical Sizes: 4″ x 4″ to 41″ x 36″
Horizontal Sizes: 4″ x 4″ to 41″ x 36″
Register Mounting Tabs Available
3 Hour Fire Rating
Vertical Sizes: 4″ x 4″ to 41″ x 36″
Horizontal Sizes: 4″x 4″ to 41″ x 36″
Register Mounting Tabs Available
Dynamic Systems
UL10A-DY – Blades in Airstream
1 1/2 Hour Fire Rating
Vertical Mount – With Spring 4″ x 4″ to 24″ x24″
Airflow Pressure Ratings up to 2,400 FPM at 4″ W.C.
UL10B-DY – Blades out of Airstream
1 1/2 Hour Fire Rating
Vertical Mount – With Spring 4″ x 3″ to 24″ x 24″
Airflow Pressure Ratings up to 2,400 FPM at 4″ W.C.
UL10C-DY (Square Damper with Round Collars)
1 1/2 Hour Fire Rating
Vertical Mount – With Spring Minumum Collar Size: Round 3″ to 8″
Airflow Pressure Ratings up to 2,400 FPM at 4″ W.C.
UL10D-DY – Thinline – 2″ Deep
1 1/2 Hour Fire Rating
Vertical Mount – With Spring 4″ x 4″ to 12″ x 12″
Airflow Pressure Ratings up to 2,400 FPM at 4″ W.C.
FDD-MB-3V – Multi-Blade (Larger than 24″ x 24″)
1 1/2 Hour Fire Rating
Vertical Sizes: Larger than 24″ x 24″ to 36″ x 48″
Multiple Selections: 108″ x 96″
Horizontal Sizes: Larger than 24″ x 24″ to 36″ x 48″
Multiple Selections: 72″ x 96″
Airflow Pressure Ratings up to 2,000 FPM at 4″ W.C.
3 Hour Fire Rating
Vertical Sizes: Larger than 24″ x 24″ to 36″ x 48″
Horizontal Sizes: Larger than 24″ x 24″ to 36″ x 48″
Airflow Pressure Ratings up to 2,000 FPM at 4″ W.C.
Combination Fire/Smoke Dampers
MODEL FSD-3V-211
Minimum Size
8˝ w x 6˝ h
Maximum UL Listed Size
Single Section: 36˝ w x 48˝ h
Multiple Assembly
Vert: 108˝ w x 96˝ h
Horz: 72˝ w x 96˝ h
U.L. 555S listed and labeled as
a Leakage Class I rated (smoke)
damper with airflow in both
directions. Class I provides for a
maximum leakage of 4cfm per sq.
ft. at 1.0” static pressure and a
maximum of 8cfm per sq. ft. at
4.0” static pressure.
MODEL FSD-3V-212
Minimum Size
6˝ w x 6˝ h
Maximum UL Listed Size
Single Section: 36˝ w x 48˝ h
Multiple Assembly
Vert: 108˝ w x 96˝ h
Horz: 72˝ w x 96˝ h
U.L. 555S listed and labeled as
a Leakage Class II rated (smoke)
damper with airflow in both
directions. Class II provides for a
maximum leakage of 10cfm per
sq. ft. at 1.0” static pressure and
a maximum of 20cfm per sq. ft. at
4.0” static pressure.
MODEL FSD-3V-231
Minimum Size
8˝ w x 6˝ h
Maximum UL Listed Size
Single Section: 36˝ w x 36˝ h
Multiple Assembly
Vert: 72˝ w x 36˝ h
Horz: 72˝ w x 36˝ h
U.L. 555S listed and labeled as
a Leakage Class I rated (smoke)
damper with airflow in both
directions. Class I provides for a
maximum leakage of 4cfm per sq.
ft. at 1.0” static pressure and a
maximum of 8cfm per sq. ft. at
4.0” static pressure.
MODEL FSD-3V-232
Minimum Size
6˝ w x 6˝ h
Maximum UL Listed Size
Single Section: 36˝ w x 48˝ h
Multiple Assembly
Vert: 72˝ w x 48˝ h
Horz: 72˝ w x 48˝ h
U.L. 555S listed and labeled as
a Leakage Class II rated (smoke)
damper with airflow in both
directions. Class II provides for a
maximum leakage of 10cfm per
sq. ft. at 1.0” static pressure and
a maximum of 20cfm per sq. ft. at
4.0” static pressure.
Control Dampers
OBD/PBD
OBD/PBD Standard
8˝ x 8˝ to 48˝ x 48˝
Multi-section
Unlimited. Supplied with jackshafting. Consult factory.
Options
6˝ Shaft / 9˝ Shaft
Manual Hand Quadrant
May be made to accommodate higher than the recommended 2.5˝w.c. static pressure
OBD/PBD Low Leakage
8˝ x 8˝ to 48˝ x 48˝
Multi-section is unlimited. Supplied with jackshafting. Consult factory.
Extruded vinyl seals (50F – 250F).
Tested to AMCA Standard 500.
Leakage Cfm/Sq.Ft.:
1.0˝ w.g./3.5
2.5˝ w.g./5.0
4.0˝ w.g./7.0
Access Doors
Insulated Access Doors
Hinged
Tab Style DAD
Gasket
Moisture, oil, and grease-resistant neoprene
Insulation
Filled with 1˝ 1½ lb fiberglass
K factor
.26+.03@75F
Label
Product label leaves space for project notes
Cam
Tab Style DADC
Gasket
Moisture, oil, and grease-resistant neoprene
Insulation
Filled with 1˝ 1½ lb fiberglass
K factor
.26+.03@75F
Label
Product label leaves space for project notes
Self-Stick Insulated Access Doors
Hinged
Tab Style NHSAD
Gasket
1˝ wide gasketed frame for fastening and sealing integrity
Easy Installation
Easy to position – No “dovetails” to align and bend
Cam
Tab Style NCSAD
Gasket
1˝ wide gasketed frame for fastening and sealing integrity
Easy Installation
Easy to position – No “dovetails” to align and bend
Vision Panel Access Doors
Hinged
Tab Style DADVP
Window
Allows viewing of inside ductwork. Two layers of shatterproof Lexan creates an insulated air pocket
Gasket
Door to frame & frame to duct neoprene gasket for an airtight seal
Insulation
Filled with 1˝ closed cell foam
Cam
Tab Style DADVPC
Window
Allows viewing of inside ductwork. Two layers of shatterproof Lexan creates an insulated air pocket
Gasket
Door to frame & frame to duct neoprene gasket for an airtight seal
Insulation
Filled with 1˝ closed cell foam
Walk-Through Access Doors
Hinged – Heavy Duty
Opening Size
Minimum 18˝w x 36˝h
Maximum 24˝w x 72˝h
Handles
36˝h to 60˝h – 2 SP-20 Handles
61˝h to 72˝h – 3 SP-20 Handles
Frame
14ga galvanized steel–mitered welded corners
Door
20ga galvanized steel – 1˝ Deep – Insulated
Contact Us
Product Resources
UL10A Prod Spec
UL10B Prod Spec
UL10C Prod Spec
UL10D TL Prod Spec
UL10AL 3HR Prod Spec
UL10BL 3HR Prod Spec
UL10CL 3HR Prod Spec
UL10DL 3HR Prod Spec
UL10A-DY Prod Spec
UL10B-DY Prod Spec
UL10C-DY Prod Spec
UL10D-DY Prod Spec
FDD-MB-3V Prod Spec
FSD-3V-212 Prod Spec
FSD-3V-211 Prod Spec
FSD-3V-232 Prod Spec
FSD-3V-231 Prod Spec
OBD/PBD Prod Spec
OBDLL/PBDLL Prod Spec
50AW Prod Spec
DADC Prod Spec
DAD Prod Spec
DADVPC Prod Spec
DADVP Prod Spec
NCSAD Prod Spec
NHSAD Prod Spec