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.
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
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
Airflow Pressure Ratings up to 2,400 FPM at 4″ W.C.
UL10D-DY – Thinline – 2″ Deep
1 1/2 Hour Fire Rating
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
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
Horizontal Sizes: Larger than 24″ x 24″ to 36″ x 48″
Airflow Pressure Ratings up to 2,000 FPM at 4″ W.C.
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.
