Fire Smoke Damper 2540 Advanced Air

Hand Control Fire Smoke Damper 2540

The 2540 has been designed to offer the most flexibility from a reset-able basic fire damper to a full fire smoke damper with actuator.

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

Fire Smoke Damper 2540

The basic 2540 is a hand control unit that is complete with a mechanical fusible link rated at 74°C that on reaching temperature will instantly close the damper blades. Through a simple modification the damper can be upgraded to full fire smoke with actuator and electrical thermal fuse.

The model 2540 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 2540 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.

The 2540 damper is available with spigotted connections. Various installation options 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 requirement on size and installation.


  • 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 on control option conversion.
  • Junction box including test button that allows easy site wiring connection.
  • All components fitted to the damper so installation simple and straight forward, therefore no additional modification to ductwork.

Electrical Conversion Control Options

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, integral micro switches are supplied as standard.


Material Specification

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

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

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

Wiring Details

Common (Brown)
Open Signal (Blue)
Closed Signal (Black)
Earth (Green/Yellow)
The 2540 is supplied with a flying lead as standard. All connections to the cable are to be made as per the wiring diagram (right).
For further details, please contact Advanced Air Sales.


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