Fire Smoke Dampers 2550 Advanced Air

Mechanical Release Fire Smoke Dampers 2550
The model 2550 is designed to close and stay closed in a fire situation creating a 4 hour fire rated barrier to stop the spread of fire, smoke and toxic fumes. The 2550 incorporates the new unique interlocking opposed blade design that eliminates the need for blade seals which burn out during fire conditions. The blade profile is of aerodynamic double skin construction, and gives a metal to metal seal, which achieves low leakage performance as stipulated in BS EN1366-2 ES classification for 240 minutes in both horizontal and vertical installations.

Advanced Air
Profile: Manufacturer
Headquarters: GB
Assortment: Fan coils, Diffusers, Grilles, Dampers
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Product descritipion

 Fire Smoke Dampers 2550

The 2550 includes a unique and versatile jackshaft arrangement with a mechanical fusible link rated at 74°C. In alarm condition the power to the actuator is removed closing the blades within 16 seconds. When the temperature is reached the fusible link breaks the connection between the actuator and the blades. The blades are then held in the closed position by the knee-lock mechanism and can not be reopened until the fusible link has been replaced.

The jackshaft arrangement allows multiple section units to be connected and driven by one actuator depending on torque requirements. The 2550 damper is available with spigotted connections. Various installation option’s are available, examples are detailed in our Methods of Installation Manual. This product is flexible and versatile and can be modified to meet most special requirements on size and installation.

Features

  • Independently tested to the BS EN1366 -2 test for integrity and leakage requirements achieving an ES240 classification.
  • Unique double skin blade design that achieves low leakage tested to British and American standards without the need for synthetic blade seals.
  • Closure maintained by the unique “knee-lock” mechanism which prevents blades from reopening the damper.
  • Wide range of actuators are available from Belimo, Honeywell and Johnson's to meet most requirements.
  • Junction box that allows easy site wiring connection.
  • All components fitted to the damper so installation simple and straight forward, therefore no additional modification to ductwork

Control Options


Standard Control - Spring Closed

The actuator without power the blades will be in the closed position and when power applied the blades will fully open. In alarm the power would be removed the damper blades fully close within 16 seconds. When the mechanical fusible link reaches 74°C it breaks breaking the connection with the actuator. The blades would not reopen until the fusible link is replaced.


Spring Open - Fail Safe Closed

The damper without power the blades will be in the open position and when power applied the blades will close fully shut. In alarm the power would be removed and the blades will fully open within 16 seconds until the mechanical fusible link reaches 74°C the blades will instantly shut by breaking the connection to the actuator.


Modulating - Volume Control

The actuators without power the blades will be in the closed position and when power is applied the blades will fully open. From the open position through a signal 0-10 volts the damper blades can be adjusted between fully open and fully closed allowing volume control. In alarm the power is removed closing the blades within 16 seconds. When the mechanical link reaches 74°C it breaks the connection to the actuator.


Blade Indication - Micro switches

To give indication of the blade position to BMS or similar micro switches that can be supplied integral to the actuator or mounted within the damper.


Material Specification

Blades: Double Skin 1.0mm galvanised mild steel as standard, Double skin 1.0 grade 430 stainless steel optional

Frame: 1.6mmm galvanised mild steel standard, 1.6mm grade 430 stainless steel optional

Frame Corners: Die formed corner channels, button locked for strength and rigidity

Casings: 1.2mm galvanised mild steel standard 1.2mm grade 430 stainless steel optional

Casing corners: Welded mitre corners finished with aluminium aerosol spray.

Linkage: External linkage. Enclosed within the frame and out of air stream. Zinc electroplated mild steel.

Bearings: Oil filled sintered bronze up to 200 degrees C

Axles: 12.7mm diameter zinc electroplated mild steel bolted directly through the blade

Jack Shaft: Zinc electroplated mild steel

Top, bottom and side jamb seals: Cambered grade 301 stainless steel

Dimensional data

Rectangle Spigotted Models

NDW - Nominal Duct Width

NDH - Nominal Duct Height

Overall Casing Width/Height = Duct Width/Height + 50mm

Minimum Single Section Duct Size: 100mm x 100mm

Maximum Single Section Duct Size: 750mm x 1000mm

For damper sizes below 200mm width or height, the casing length increases. Please contact our Advanced Air sales for full dimensional details.


Circular Spigotted Models

NDD - Nominal Duct Diameter

Overall Casing Width/Height = Duct Diameter + 75mm

Minimum Single Section Duct Size: Ø100mm

Maximum Single Section Duct Size: Ø750mm

For damper sizes below Ø200mm the casing length increases. Please contact our Advanced Air sales for full dimensional details

 

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