FKRS-SK

CIRCULAR (ES) FIRE DAMPER FOR SHUTTING OFF AIR DUCTS WITH A FIRE RESISTANCE OF 60 MINUTES

Available in 6 nominal sizes from 100 – 315 mm
Low differential pressure and sound power level
Optionally with coating for increased corrosion protection and appearance requirements
Integration into the management and control equipment (MCE)
Installation options remote from walls, with and without duct insulation
Installation options in fire-resistant walls with and without duct insulation

Optional equipment and accessories

Electric actuator 24 V/230 V
Release temperature 72 °C

Useful additions

Duct smoke detectors

General information

Smoke dampers with CE marking and Declaration of ▪ Performance, for the isolation of air ducts between two fire ▪ compartments in the event of a fireDuct smoke detector RM-O-3-DDuct smoke detector with airflow monitor RM-O-VS-D
To prevent the propagation of fire and smoke through ductwork to adjacent designated fire compartments
Special characteristics
Declaration of Performance according to the European Construction Products Regulation
Classification according to EN 13501-3
Certified mortar-based or dry mortarless installation
Certified usability remote from walls
Circumferential gap dimensions in the mortar-based installation with mortar up to 225 mm permitted
Meets the requirements of European product standard EN 15650
Tested for fire resistance properties in accordance with EN
Construction features
Rigid circular casing suitable for push fitting into drilled cores without additional drilling and chiselling being required
Pipe stubs with lip seal on both ends, suitable for air ducts according to EN 1506 and EN 13180
Suitable for the connection of ducts, cover grilles or flexible connectors
The release mechanism is accessible and can be tested from the outside
One inspection access panel
Remote control with spring return actuator
Standards and guidelines
1366-2 (300 Pa negative pressure) ▪
Meets the hygienic requirements according to VDI 6022-1, ▪VDI 3803-1, DIN 1946-4 and EN 16798-3, as well as Ö- ▪Norm H 6020 and H 6021 and SWKI
Corrosion protection according to EN 15650 in connection ▪with EN 60068-2-52
Closed blade leakage air flow according to EN 1751, class ▪3 ▪Construction Products RegulationEN 15650 Ventilation for buildings – Fire dampersEN 1366-2 Fire resistance tests for service installations –Fire dampersEN 13501-3 Fire classification of construction products and building elementsEN 1751 Ventilation for buildings – Air terminal devices 2006/42/EC – Machinery Directive
Casing leakage air flow according to EN 1751, class C
Low differential pressure and sound power level
Material and surfaces
Casing:
Integration into the MCE with AURASAFE Mini
Galvanised sheet steel
Integration into the MCE with the international standard fireDamper blade:damper system according to IEC 62026-2
Classification
E 60 (ve, , i ↔ o) S
Damper blade: Special insulation material
Special insulation material with impregnation
Replaceable damper blade (from NS 200 mm)EI 60 (ve, , i ↔ o) S
Nominal sizes
NS [mm]: 100, 125, 160, 200, 250, 315
L [mm]: 400
Variants
With spring return actuator
With cover grille
Parts and characteristics
Release temperature 72 °C
Installation orientations from 0° to 360°
Attachments
Limit switch for damper blade position indication
Spring return actuator with 24 V AC/DC or 230 V AC supply voltage
All attachments can also be retrofittedOther components:
Damper blade shaft in galvanised steel
Plastic plain bearings
Elastomer seals
Supply package
If attachments and accessories are factory-mounted on the fire dampers, they are already included in the order code. Depending on the installation situation, supplementary materials for assembly and fixing may be needed to ensure proper installation, e.g. mortar, screws, mineral wool, etc. Such materials are not usually included in the supply package (unless stated otherwise). Attachments and accessories have to be selected by people in charge of the building project. These people also have to select and provide any additionally required installation or fixing materials and make sure that the required classifications are met.
Accessories
Cover grille
Flexible connectors
Extension piece
Maintenance
The functional reliability of the fire damper must be tested at least every six months; this has to be arranged by the owner of the ventilation system; functional tests must be carried out in compliance with the basic maintenance* Data applies to uniform upstream and downstream conditions of the fire dampers

Technical information

Construction with Gruner spring return actuator

1 Casing

2 Damper blade with ring seal

3 Inspection access (12 mm)

4 Travel stop for CLOSED position

5 Lip seal

6 Spring return actuator

7 Thermoelectric release mechanism with temperature sensor

8 Mounting bracket

9 Installation ring, ordered separately

The spring return actuator is used for motorised opening and closing of the fire damper and for activation by the MCE. In the event

of a fire, the damper is triggered thermoelectrically at 72 °C. If power is supplied to the actuator, the damper blade remains open.

Interruption of the supply voltage causes the damper to close (closed current principle).

Motorised fire dampers can be used to shut off ducts.

The torques of each actuator are sufficient to open and close the damper blade even while the fan is running.

The spring return actuator is fitted with limit switches that can be used as position indicators for the damper blade position.

In the event of a fire, fire dampers shut automatically to prevent

the propagation of fire and smoke through air ducts to adjacent

designated fire compartments. In the event of a fire, the system is

triggered by a thermoelectric release mechanism at a release

temperature of 72 °C. The release mechanism is accessible and

can be tested from the outside

The position indicator of the damper can be queried on the

actuator using one or two limit switches.

Nominal sizes	100 to 315 mm
Casing length	400 mm
Volume flow rate range	Up to 770 l/s / up to 2770 m³/h
Differential pressure range	Up to 1500 Pa
Temperature range 1, 4	-20 to 50 °C
Release temperature	72 °C
Upstream velocity 2	Version with spring return actuator ≤ 10 m/s

1 Temperatures may differ for units with attachments. Details for other applications are available on request.

2 Data applies to uniform upstream and downstream conditions of the fire dampers.

4 Non-condensing operation and without humidity ingress via the outdoor air intake.

Free cross-sections and zeta values

NS	100	125	160	200	250	315
A [m²]	0.005	0.009	0.016	0.027	0.042	0.069
ζ	1.71	1.08	0.67	0.44	0.45	0.28

1 Type

FKRS-SK Fire damper Scandinavia E60S

2 Casing variant

No entry: standard construction

3 Damper blade variant

No entry: standard variant

4 Country of destination

DK Denmark

NO Norway

SE Sweden

5 Nominal size [mm]

100, 125, 160, 200, 250, 315

6 Accessories

A0 Cover grille on the operating side

7 Attachment

Z43 Spring return actuator 230 V (Gruner)

Z43B Spring return actuator 230 V (Belimo)

Z45 Spring return actuator 24 V (Gruner)

Z45B Spring return actuator 24 V (Belimo)

Downloads

product information

Product data sheet FKRS-SK

FKRS-SK_PD_2025_02_19_DE_en Product data sheet 580 KB pdf

certificates

Declaration of Performance FKRS-SK

FKRS-SK_001_DoP_2025_01_DE_en 1,4 MB pdf

operation manuals

Installation and operating manual FKRS-SK

FKRS-SK-IOM_CD10099_V1_2024_12_GB_en 4,6 MB pdf

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FKRS-SK

CIRCULAR (ES) FIRE DAMPER FOR SHUTTING OFF AIR DUCTS WITH A FIRE RESISTANCE OF 60 MINUTES

General information

Special characteristics

Construction features

Standards and guidelines

Material and surfaces

Classification

Nominal sizes

Variants

Parts and characteristics

Attachments

Supply package

Accessories

Maintenance

Technical information

Free cross-sections and zeta values

Downloads

product information

Product data sheet FKRS-SK

certificates

Declaration of Performance FKRS-SK

operation manuals

Installation and operating manual FKRS-SK

TECHNICALLY NECESSARY

STATISTICS AND WEBSITE ANALYSIS

CONVENIENCE AND PERSONALISATION

FOR THE BEST TROX EXPERIENCE