Models FSD-A and B are multi-blade fire and smoke dampers with 3V style blades, designed to close the HVAC duct opening in emergency fire situations.
They are certified to withstand fire conditions for 2 hours (installed vertically) and 4 hours (installed horizontally) as per UL555 testing standards, tested and approved by CBRI Roorkee. Airflow can be in either direction.
Model FDM-A is a multi-blade motorized fire damper with 3V style blades, designed to close the HVAC duct opening in emergency fire situations.
The open close switch OCS can be supplied with fire or fire & smoke dampers to indicate the blade position.
The open close switch OCS-M can be fitted to control dampers or fusible link fire dampers to show the blade position.
The Caryaire resettable temperature response device (RTR) is used on its own or with an open close switch (OCS) in fire and fire & smoke dampers.
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