Model FLD-S-U is a UL 555 classified fusible link multi-blade fire damper with 3V style blades, designed to close the HVAC duct opening in fire situations.
It is UL555 classified for a 90 min fire rating under static conditions, and can be installed vertically with blades running horizontally and airflow in either direction.
Model FLD-S-UD is a UL 555 classified fusible link multi-blade fire damper with 3V style blades, designed to close the HVAC duct opening in fire situations.
Model SD-A-U is a UL555S classified multi-blade smoke damper with 3V style blades, designed to close the HVAC duct opening in smoke situations.
Model SD-B-U is a UL555S classified multi-blade smoke damper with 3V style blades, designed to close the HVAC duct opening in smoke situations.
Model FSD-A-U is a UL555 and UL555S classified multi-blade combination fire and smoke damper with 3V style blades, designed to close the HVAC duct opening in fire and smoke situations.
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