The 2590 has been designed to operate at 300°C for 2 hours to allow the extraction of smoke and toxic fumes during fire conditions. The 2590 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.
The 2590 includes a unique and versatile jackshaft arrangement and knee-lock mechanism that holds the blades closed in the event of the actuator failure.
The jackshaft arrangement allows multiple section units to be connected and driven by one actuator depending on torque requirements. The 2590 damper is available with spigotted connections. Various installation option’s areavailable, examples are detailed in our Methods of Installation Manual. This product is flexible and versatile and canbe modified to meet most special requirements on size and installation.
In the fully closed position, with power off, the damper will maintain stability and integrity for 4 hours.
Spring Open
The damper with power on will go to the closed position and power off will return to the open position
Spring Closed
The damper without power the blades will be in the open position and when power applied the blades will close fully shut
Modulating - Volume Control
When power is applied the blades will fully close. From the closed 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 opening the blades within 16 seconds.
Power Open and Closed - No fail safe position
The damper blades are powered open and powered closed that allows the damper to be controlled during a fire situation. When power fails the damper blades will stop and stay in that position.
Blade Indication - Micro switches
To give indication of the blade position to BMS or similar, integral micro switches are supplied as standard.
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
Open Signal (9/White)Common (7/Purple)
Closed Signal (5/Green)Earth (Green/Yellow)
Live (Brown)
Neutral (Blue)
The 2590 type dampers with electrical actuators enclosed in a thermal enclosure are supplied to site with the flying leads to the actuator coiled up for on-site connection.
Frame: 1.6mmm galvanised mild steel standard, 1.6mm grade 430 stainless steel optional
Casings: 1.2mm galvanised mild steel standard 1.2mm grade 430 stainless steel optional