FK90K fire damper (FK92K series)
FK90K fire dampers of the FK92K series have a very short overall length and are particularly suitable for installation in confined spaces. They can be installed in wet and dry conditions without minimum clearances. Their large free cross-section allows maximum volume flows with minimum pressure losses. The FK90K, series FK92K, is maintenance-free by design.
Technical details
- Suitable for very confined spaces thanks to short overall length and minimal installation clearances
- Large free cross-section for maximum air flow rates and minimal pressure losses
- Maintenance-free design: Thanks to the complete encapsulation of the operation unit, release mechanism and release element, no function-maintaining cleaning or recurring lubrication and adjustment are necessary.
- Can be combined with building control systems such as the Wildeboer-Net
- Extensive number of tested installation situations
- Complies with product standard DIN EN 15650 and is CE marked
- EPD (Environmental Product Declaration)
- Hygiene certificate
Declarations & proofs
Product details
The square FK90K fire dampers in the FK92K series are particularly suitable for very confined installation situations, e.g. in false ceilings. The advantage for builders and specialist planners is that valuable space can be gained because the fire damper requires very little space. Nevertheless, they have a large free cross-section. This allows maximum volume flows to be achieved with minimum pressure losses. The sound power levels are correspondingly low.
Design of the FK90K fire damper
The FK90K fire dampers have an airtight casing with class C according to EN 1751 and a replaceable shut-off damper blade made of abrasion-resistant and corrosion-resistant calcium silicate.
Other steel parts of the FK90K fire damper are galvanized or optionally available with an epoxy resin coating. The encapsulated release elements activate at a nominal temperature of 70°C or 95°C. The operation units can be manually or electrically operated.
Maintenance-free design
The FK90K fire dampers are maintenance-free thanks to their design with complete encapsulation of the drive mechanism.
Servicing of the FK92K fire damper is limited to functional tests in the form of complete closing and reopening of the fire dampers or repair measures in the event of defects being detected.
Cleaning for hygiene reasons can be carried out as part of the overall cleaning of the ventilation and air conditioning system or as required.
Automated functional tests
The functional tests can also be carried out easily and reliably by remote control via an electronic control system, such as the Wildeboer-Net building management system.
Installation situations
They can be installed in wet and dry conditions without minimum clearance. They are suitable for installation in and remote from solid walls and ceilings, as well as in and remote from metal stud walls and in fire walls and shaft walls with or without metal studs. Installation can be carried out with the shut-off damper blade axis horizontal or vertical, and the air flow direction is possible from any connection side. With dimensions ranging from 100 mm x 100 mm to 800 mm x 250 mm (W x H), FK90K fire dampers are ideal for confined installation conditions. The user manual and operating instructions for the FK90K fire damper, series FK92K, provide a detailed overview of the wide range of options available.
Product markings
The maintenance-free FK90K fire dampers comply with the European product standard EN 15650, have been tested in accordance with EN 1366-2 and bear the CE mark. With the present MPA-BS 6000/593/18 certificate for the fire behavior of the building materials used, they also meet the usage requirements of the Model Administrative Provisions for Technical Building Rules (MVV TB) and the Model Ventilation System Guideline (M-LüAR). The FK92K series is suitable for a fire resistance period of 30/60/90 minutes.
The FK90K fire damper, FK92K series, is marked with an Environmental Product Declaration (EPD) and a hygiene certificate from an independent hygiene institute.
Why fire dampers by Wildeboer are truly maintenance-free!
Technical specifications
Not all variant values listed here can be combined with each other. Use our Wildeboer configurator to easily check the available options.
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Product pictures
Media & Downloads
Electrical spring return actuator
- FK90: for sizes B ≤ 800 mm and H ≤ 450 mm only
- Default actuator of FK90K
- Runtime: Opening < 60 s, closing ≈ 20 s.
- CLOSED/OPEN position indicators via limit switches
FAQ
The 92 series fire dampers are maintenance-free. Due to their design and the materials used, such as the complete encapsulation of the actuator mechanics, the thermal release device, the motorized actuators, etc., they can do without ongoing maintenance work to maintain their function. Periodic lubrication, for example, is not required. Maintenance is thus limited to functional checks (triggering and reopening of the fire dampers) or repair measures in the event of damage. Hygienic cleaning must be carried out as part of the overall cleaning of the ventilation and air-conditioning system or as required.
Due to the fact that the system is maintenance-free, functional checks may also be carried out remotely. This can be carried out particularly easily and economically via the Wildeboer BS2 communication system for fire dampers with automatic calendar control.
For this purpose, the shut-off damper blade of the fire damper must be closed and opened again. The fire damper can be equipped with different release devices or with electric spring return motors for opening and closing.
For the function test, the manual release must be operated or a remote release must be performed to close the shut-off damper blade of the fire damper. Afterwards, the shut-off damper blade must be opened again.
The respective commissioning and function control measures as well as notes on operation are described in the operating instructions.
You can find our operating instructions in the download area.
When it comes to the functioning and operation of fire dampers in accordance with DIN EN 15650, there are several specifications and obligations that must be complied with. We have summarized the essentials in a document that you can view and download here.
If the fire damper cannot be opened, the fusible link sleeve or the thermoelectric fusible link must be checked for integrity. These must be in proper condition and must not show any damage. Refer to the respective operating instructions for the design and replacement.
In addition, no installed parts may obstruct or block the damper blade freewheeling.
If these measures do not work, please contact our technical support.
You will find our operating instructions in the download area.
A minimum distance to adjacent walls and ceilings is not required when installing square fire dampers from Wildeboer Bauteile GmbH. Only a small distance is required for the round fire damper FR90.
The corresponding specifications can be found in the respective user manuals.
We have summarized details on the handling of fire dampers with asbestos-containing building materials for you in this document (german).
No. The fire dampers each have two inspection openings. These allow a view into the interior of the fire damper, on both sides of the damper blade. Inspection openings can be ordered as an option for the FK90 fire damper. These do not replace openings of corresponding size, which must be provided for cleaning purposes based on relevant standards and guidelines.
Yes, the AMP connectors can be removed.
Yes. The fire dampers are equipped with an electric spring return motor or a thermal-mechanical release device (TMA) at the factory. A fire damper equipped with a TMA at the factory can be retrofitted with a spring return motor. Complete actuator units for the particular damper type are required for the retrofit. These include the motor console, the spring return motor and the electric fusible link.
Yes, it is possible to retrofit a limit position switch for both the open and closed positions of the fire damper. Spring return motors have both limit switches as standard.
An elastic connector, also called an expansion compensator or canvas connector, is suitable for installation between a ventilation duct and components of a ventilation system, e.g. a fire damper. It can absorb changes in the length of the connected duct, burn off in the event of a fire and thus prevent the transmission of force from the ventilation duct to the fire damper.
FK90, FR90 (FR92 and FR92K series) and FK90K fire dampers are CE marked construction products according to the harmonized product standard DIN EN 15650. They can be connected on one or both sides to ventilation ducts made of non-combustible or combustible building materials. In the event of fire, thermal expansion of these ducts must not exert any significant forces on the fire damper. Compensatory measures must be provided in accordance with local requirements. In Germany, the "Guideline on Fire Protection Requirements for Ventilation Systems", or "Ventilation System Guideline - LüAR" for short, contains building code requirements for implementation and necessity. In general, compensation is achieved by suitable pipe routing. There is no general requirement for the use of flexible connectors.
In addition, when using the FK90 fire damper for commercial kitchens, the specifications of the general building inspection approval Z41.3-670 must be observed. Ventilation ducts made of galvanized or stainless steel must be connected. For the installation of the ventilation duct and limitation of forces, the above-mentioned guideline must also be referred to.
In addition, ventilation ducts on FK90 fire dampers for commercial kitchens are in accordance with the building authority approval
- in metal stud walls
- in walls made of gypsum wallboards
via suitable elastic connectors (expansion compensators) made of combustible building materials, at least building material class B2 according to DIN 4102-1. An expansion allowance of ≥ 100 mm in the installed state is required.
On 01 July 2013, the European Construction Products Regulation (CPD, No. 305/2011) came into full force in all EU member states after a transitional period and replaced the Construction Products Directive (CPD, No. 89/106/EEC).
Newly produced fire dampers that fall under the harmonized product standard EN 15650 must already be marked with the CE conformity mark since 01 September 2012. Since July 01, 2013, the manufacturer has also been required to submit a declaration of performance (DoP). He thus assumes responsibility for the conformity of the fire damper with the declared performance. The declarations of performance are available for:
As a result, Deutsches Institut für Bautechnik (DIBt) may no longer issue or extend general building inspectorate approvals (abZ) for fire dampers that fall under the harmonized product standard EN 15650 and must therefore bear a CE marking. They may no longer be required as proof of usability for national construction projects.
The information required for installation and assembly is fully described in the comprehensive user manuals.
Overflow openings ensure the flow of air between two nearby rooms, e.g. for the ventilation of interior corridors and rooms or for air supply. If overflow openings are provided in fire-resistant walls or ceilings, it must be possible to close them properly. Fire dampers with a smoke release device without connection to a ventilation duct are used here. In the event of a fire, they close the opening and thus prevent the spread of fire and smoke. With the FK90 and FR90 fire damper in combination with OR4 or the OR32 smoke release device, Wildeboer offers solutions with the necessary general type approval from the German Institute for Building Technology, which is required for use in Germany.
