FSD-C Series - Galavanised Steel Blades, Installation Plate (IP)

The BSB FSD-C Series, Circular Single Blade Fire Damper

FSD-C series Circular Single Blade ES rated motorised Fire Damper is designed to stop the spread of fire and smoke through circular ducts which pass through fire rated walls, floors, ceilings and cavity barriers.

ES classified fire damper with reduced smoke leakage characteristics (BS EN 1366-2) Size range available: 100mm to 315mm dia. Can be installed from one side of the fire separation barrier without the need for fire-rated infill material.

Designed to be installed in circular ducted HVAC systems at fire boundaries, the FSD-C Series offers robust performance in fire condition, ensuring integrity of compartmentation is maintained. Suitable for use in areas of sleeping risk and protected escape routes.

The FSD-C Series circular single blade Fire dampers are suitable for use in dryline walls and masonry/concrete walls and floors and cavity barriers and is independently 3rd party tested and certified to the following standards:

• Fire resistance tested to BS EN 1366-2.
• ES classified to BS EN13501-3.
• CE marked to BS EN 15650.
• Closed blade leakage Class 3 to BS EN 1751.
• Damper casing leakage Class C to BS EN 1751, normal operating conditions – to a maximum of 1000Pa.
• The patented single blade layered design is held open via the actuator and will spring closed on input signal from damper control system and/or fire alarm input.
• The damper design enables testing via the thermal fuse test button without the need for specialist tools or access panels. NB: Access panels may be required to comply with DW145 G.3.1.5.

Price exclude actuator, please search for FSD-C Series Actuator

What is a fire damper and why might they be needed?
The FSD-C Series Single Blade Circular Fire Damper is designed to stop the spread of fire through ducts passing through walls and floors.
The product range has many features and options to meet the requirements of specifiers, contractors, local and national authorities. 
Dampers are available to suit both low/medium and high velocity applications.
What are the ‘E’ and ‘ES’ classifications?
To achieve the classifications to EN13501-3, fire dampers and fire and smoke dampers shall be tested to EN1366-2 and a 300Pa pressure difference is applied across the damper. During the fire test period, the integrity of the seal between the damper and the
structure shall not have any gaps larger than 150mm x 6mm. There shall not be any sustained flaming. The largest size of damper to be manufactured for sale as a single section shall be fire tested.
E = Integrity
The maximum leakage permissible at 300Pa corrected to 20°C is 360m3/hr/m2 (100 l/s/m2) throughout the fire test period. 
ES = Integrity with Smoke Leakage Performance
The maximum leakage permissible at 300Pa corrected to 20°C is 200m3/hr/m2 (55.5 l/s/m2) at ambient prior to the fire test and throughout the fire test period. In addition, for the ES classification to be attained, the smallest damper must also meet the
200m3/hr/m2 maximum leakage with a 300Pa pressure across the damper. (This is  equivalent to just 0.55 l/s on a 100x100 damper) 
Fire dampers should be installed as tested.
Some applications (fan off) allow the use of tests undertaken to BS 476-20/22 and this is also allowed worldwide in areas outside of the EU. Test reports showing testing to EN 1366-2 should be acceptable to meet the requirements of BS 476-20/22, but the reverse is definitely not the case and no classifications are available.
However, as a word of caution, in whichever case, the correct model must be selected, to match fire resistance time with installation method and with the supporting construction (wall or floor).
To ensure that all testing and assessments are traceable back to initial fire test reports, the BSB FSD-C series is product certificated by 
the Loss Prevention Certification Board (LPCB). This means that in addition to normal BS EN ISO 9001 compliance, the product is also 
checked to ensure that same product is being manufactured that has been tested or assessed.