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Fire Dampers

Static Systems

Static 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.

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Dynamic Systems

Dynamic 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.

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Combination Fire/Smoke Dampers

Dampers meet both the specific test standards for fire and smoke situations 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. 

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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.

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access doors

Facilitating safe access to ductwork. Hinged or Cam design.

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Product Resources

View the Duro Dyne Damper Brochure Here: Duro Dyne Fire Damper Product Brochure

All Product Downloads below in Product Resources

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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.

Duro Dyne Fire Damper Certifications

    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

    OPB/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

    OPB/PBD Low Leakage

    8˝ x 8˝ to 48˝ x 48˝
    Multi-section 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 HSAD

    Gasket
    1˝ wide gasketed frame for fastening and sealing integrity
    Easy Installation
    Easy to position – No “dove tails” to align and bend

    Cam

    Tab Style CSAD

    Gasket
    1˝ wide gasketed frame for fastening and sealing integrity
    Easy Installation
    Easy to position – No “dove tails” to align and bend

    Vision Panel Access Doors – Tab Style HSAD

    Hinged

    Tab Style DADVP

    Window
    Allows viewing of inside ductwork. Two layers of shatter proof Lexan creates an insulated air pocket
    Gasket
    Door to frame & frame to duct neoprene gasket for airtight seal
    Insulation
    Filled with 1˝ closed cell foam

    Cam

    Tab Style DADCVP

    Window
    Allows viewing of inside ductwork. Two layers of shatter proof Lexan creates an insulated air pocket
    Gasket
    Door to frame & frame to duct neoprene gasket for 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

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