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 Fire & Smoke Damper  A to Z Products
 Introduction
 
Combination Fire/Smoke dampers function as both a fire damper and a smoke damper in a single unit. HVAC system designers often combine smoke barriers and fire rated partitions, requiring both a fire damper and a smoke damper to be installed in the same location. A combination fire/smoke damper is recommended in this situation.

They are used in HVAC penetrations where a wall, floor, or ceiling is required to have both a fire damper and smoke damper.


All combination fire/smoke dampers require factory installed electric actuators. They are controlled by a smoke or heat detector signal, fire alarm or other building control system to prevent the spread of smoke.

Manual or automatic override allows the damper to be used as part of an engineered smoke control system. When temperatures exceed the closure temperature of the damper, the blades close and lock to protect the integrity of the fire rated partition.

The things to consider when selecting and applying a combination fire smoke damper are the same as those for fire dampers and smoke dampers. They are:

Hourly Fire Resistance Rating
Leakage Rating
Elevated Temperature Rating
Operational Rating
Blade Design
The COSMOS model FSD is designed to prevent the spread of fire and smoke through ventilation ductwork in walls and floors. From receiving an alarm the power to the damper actuator is removed releasing the actuator spring to release closing the damper.

The dampers also include electrical thermal sensor and a secondary mechanical fusible link that prevent the damper from opening if the temperature has reached 74 ⁰C.

COSMOS make fire/smoke dampers are always supplied with the appropriate factory‐mounted actuator.
 
 Standard Construction
 
Frame: 16 gauge (1.6mm) galvanized steel interlocking hat section channel frame construction.
Blade: 16 gauge (1.6mm) galvanized 3 “V” formed.
Sleeve: 20 gauge (1.0mm) galvanized construction.
Closure Devise: Electric actuator or fusible link with closure temperature of 165 ⁰F (74 ⁰C). Others are available.
Bearings: Brass bushing for friction free operation.
Axial: 16mm dia. MS steel.
Linkage: Stainless steel concealed in the channel frame.
Blade Seal: Mechanically fixed Silicon on “V” groove blade.
Jamb Seal: Stainless steel.
Linkage: Stainless steel concealed in the channel frame
 
 Features
 
19" rack mountable or table top version Front and rear screw less
Single depth extrusions with decorative grooves Optimised usable height for 1u and 2u subracks
Softline with minmum screws    
 
 Construction
 
Aluminium special alloy extrusions and sheets
Screw type construction
Aluminium or CRCA base plate for components
Card racks with GFN guides for PCBS - EURO / VME / CPCI
Legs - plastic
 
 Compliance
 
IEC 297 and DIN41494
IEEE 1101.10 / 11
IEC 297 and DIN41494
IEEE 1101.10 / 11
 Products
 
Aluminium special alloy extrusions and sheets
Screw type construction
Aluminium or CRCA base plate for components
Card racks with GFN guides for PCBS - EURO / VME / CPCI
Aluminium special alloy extrusions and sheets
Screw type construction
Aluminium or CRCA base plate for components
Card racks with GFN guides for PCBS - EURO / VME / CPCI
Legs - plastic
Aluminium special alloy extrusions and sheets
Screw type construction
Aluminium or CRCA base plate for components
Card racks with GFN guides for PCBS - EURO / VME / CPCI
Legs - plastic
Aluminium special alloy extrusions and sheets
Screw type construction
Aluminium or CRCA base plate for components
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