Circular dampers

The FDR circular fire damper is designed to divide fire compartments and prevent the spread of toxic gases, smoke and flames. The FDR fire damper is an element of passive fire protection and, together with the method of its installation, is an inseparable part of the evaluation of the fire resistance of a building. The FDR circular fire damper is certified according to the ČSN EN 15 560 standard, tested according to ČSN EN 1366-2 and classified for EIS according to the 13501-3+A1 standard. The FDR fire dampers are made of galvanized sheet steel and contain lime-silica parts, fire-resistant carbon fiberglass, polyurethane foam and ethylene-propylene rubber.

Types of offered FDR fire dampers 

FDR-3G
Damper with fire resistance up to 120 minutes, size range from 100 to 1000 mm, access door included.

FDR-3G-KS
Damper with fire resistance up to 120 minutes equipped with a square installation kit designed for a square installation opening, which is a fixed part of the damper. Size range from 100 to 630 mm.

FDR-3G-KR
Damper with fire resistance of up to 120 minutes equipped with a circular installation kit designed for a circular installation opening, which is a fixed part of the damper. Size range from 100 to 630 mm.

FDR-3G-OF
Damper with fire resistance up to 120 minutes equipped with a protection overflow grille on both sides. Size range from 200 to 630 mm.

The FDR fire dampers are supplied with manual control or with an actuator.

FDR fire damper with manual control
The FDR fire damper mechanism is activated when the temperature at the fuse reaches 74 °C (100 °C on request). In the event of a fire, the damper closes automatically within 10 seconds after the thermal fuse has blown. When the grille is closed, the grille blades remain locked in the closed position and can only be opened manually.

FDR fire damper with actuator
The FDR fire damper with actuator is equipped with limit switches as standard, optionally with power supply and communication unit. The actuator closes the damper based on a signal from the building management system (power failure) or when the thermoelectric temperature sensor temperature exceeds 72 °C (95 °C or 120 °C on request). The actuator supply circuit is interrupted and the spring closes the damper blades within 20 seconds.

Damper activation mechanism with manual control
• H0 
Basic damper design, manual actuation mechanism with return spring and fusible thermal fuse with activation at 74 °C (100 °C on request). The mechanism is equipped with a protection cover IP 44 
• H2 
Manual activation mechanism H0 + indication of open and closed position by two limit switches for 230V AC or 24V AC/DC. The mechanism is equipped with a protective cover IP 44. 
• H5-2 
Manual activation mechanism H0 + activation mechanism with 24V AC/DC electromagnet in pulse connection (activation of damper blade closing occurs by impulse after voltage is applied to the electromagnet) + indication of closed and open position of the damper with two limit switches for 230V AC or 24V AC/DC. The mechanism is equipped with an IP 44 protection cover. 
• H6-2 
Manual activation mechanism H0 + activation mechanism with 230V AC electromagnet in pulse connection (activation of damper blade closing occurs by impulse after voltage is applied to the electromagnet) + indication of closed and open damper position by two limit switches for 230V AC or 24V AC/DC. The mechanism is equipped with an IP 44 protection cover.

Activation mechanism of the dampers controlled by an actuator
• B230T or G230T 
Activation mechanism with Belimo (B230T) or Gruner actuator (G 230T) with return spring, further equipped with thermoelectric trigger sensor with activation at 72 °C. The actuator includes two limit switches for signaling the position of the damper blade. Power supply 230V AC.
• B24T or G24T 
Activation mechanism with Belimo (B24T) or Gruner actuator (G24T) with return spring, further equipped with a thermoelectric trigger sensor with activation at 72 °C. The actuator includes two limit switches for signaling the position of the damper blade. Power supply 24V AC/DC.
• BST0 or GST0
Activation mechanism with Belimo actuator (BST0, 24V AC/DC, power supply via 230V AC communication unit) or Gruner actuator (GST0, 24V AC/DC, power supply via 24V AC communication unit) with return spring, further equipped with thermoelectric trigger sensor with activation at 72 °C. The actuator includes two limit switches for signaling the position of the damper blade. Power and communication units Belimo BKN 230-24 or Gruner fs-UFC230-2.
• B24T-W or G24T-W
Activation mechanism with Belimo (B24T-W) or Gruner actuator (G24T-W) with return spring, further equipped with thermoelectric trigger sensor with activation at 72 °C and cables for power supply and communication unit (communication unit is not part of the mechanism). The actuator includes two limit switches for signaling the position of the damper blade. Power supply 24V AC/DC.
• B24T-SR or G24T-SR
Activation mechanism with Belimo (B24T-SR) or Gruner actuator (G24T-SR) with return spring and 0-10V control (possibility to set the position of the blade in any position), further equipped with a thermoelectric trigger sensor with activation at 72 °C. The actuator also includes limit switches for signaling of the damper blade position. Power supply 24V AC/DC. This activation mechanism can only be used for dampers with DN ≥ 160 mm.

Catalog sheet of the product line: FDR-en.pdf. Declaration of performance of the product line: FDR_declaration-of-performance.pdf.

The FKR-EU circular fire dampers for closing duct penetrations between fire compartments, for different installation methods, available in many sizes and designs. The FKR-EU fire dampers can be supplied in diameters 315 - 800 mm. Low pressure drop and acoustic performance levels with universal installation options. Integration into a central building management system using TROXNETCOM. Fire resistance class according to EN 13501-3, up to EI 120 (ve, ho, i ↔ o) S.

Optional equipment and accessories for the fire dampers FKR-EU: Electric actuator 24V / 230V. Starting temperature 72/95 °C or smoke detectors. Flanges. Cover grilles.

The FKR-EU fire damper complies with the European product standard EN 15650:2010 in circular design, with two access openings that can be opened without tools. Tested for fire performance according to EN 1366-2:2015 (300 Pa and 500 Pa underpressure), with CE marking.

Catalogue of the product series: FKR-EU-en.pdf. Declaration of performance of the product series: FKR-EU_declaration-of-performance.pdf. Instructions for use of the product series: FKR-EU-instructions-for-use.pdf

• Two access openings

• Available in explosion proof version (ATEX) for zones 1, 2, 21 and 22

• Damper diameter from 315 mm

• Optional installation of an additional actuator

• Suitable for a wide range of installation situations (certified)

• Hygienic certificate

FKRS-EU circular fire damper for closing duct transitions between fire compartiments, for various installation methods, available in many sizes and designs. The FKRS-EU fire dampers are available in diameters of 100 - 315 mm. Low pressure drop and sound power level with the possibility of universal installation. Integration into the central building management system using the TROXNETCOM. Fire resistance class according to EN 13501-3, up to EI 120 (ve, ho, i ↔ o) S.

Optional equipment and accessories for the FKRS-EU fire dampers: Electric actuator 24V / 230V. Starting temperature 72/95 °C or smoke detectors. Protection grilles.

The FKRS-EU fire damper is in accordance with the European product standard ČSN EN 15650 in circular design, with two access doors that can be opened without the use of tools. Tested in terms of fire protection properties according to ČSN EN 1366-2 (underpressure 300 Pa and 500 Pa), with CE marking.

Catalog sheet of the product line: FKRS-EU-data-sheet.pdf. Declaration of performance of the product line: FKRS-EU_declaration.pdf. Instructions for use of the product line: FKRS-EU-manual.pdf.

• Explosion-proof design (ATEX) available for zones 1, 2, 21 and 22

• Damper diameter from 100 mm 

• Possibility of additional installation of an actuator 

• For a wide range of installation situations (certified) 

• Hygienic certificate

FDMC are fire dampers serving as closures in ducts of air handling equipment, which prevent the spread of fire and combustion products from one fire section to another by closing air ducts in the places of installation. The FDMC fire dampers are manufactured in diameters from 100 to 400mm.

• tested to EN 1366-2 in conjunction with EN 1363-1 

• max. pressure difference at the damper 1 200 Pa

• fire resistance according to EN 13501-3 + A1 EIS 60

• for a maximum air velocity through the damper of 12 m/s

• body made of galvanised sheet metal, damper blade made of lime-silica insulation board

The FDMR fire dampers are HVAC devices that prevent the spread of fire and combustion products from one fire compartment to another. The FDMR fire damper blade automatically closes the air passage by means of a closing spring or a servo-drive. After closing the blade, the damper is sealed against the passage of smoke by a silicone seal. Upon customer request, silicone-free gaskets are available.

The FDMR fire dampers replace PKTM III, FDMD, PKTM 90 and PKTM90PM dampers.

• CE certification according to EN 15650
• tested according to EN 1366-2
• classified according to EN 13501-3+A1
• fire resistance: EIS 120-500 Pa, EIS 120, EIS 90, EIS 60
• tightness according to EN 1751, class C through the housing and class 3 through the damper blade
• C 10 000 cycling according to EN 15650
• corrosion resistance according to EN 15650
• EC Certificate of Conformity: 1391-CPR-2020/0004
• Declaration of performance PM/FDMR/01/19/1
• Hygiene assessment - Opinion No 1.6/pos/19/19b

The FDMS fire dampers are closures in the ducting of HVAC equipment, which prevent the spread of fire and combustion products from one fire compartment to another by closing the air duct in the places of installation. In the event of a fire, the FDMS fire damper blade automatically closes the ventilation duct by means of a closing spring or a return spring of the servo drive. The dampers are fitted with a collar, which replaces the function of the fire seal and thus simplifies its own installation in the fire compartment structure.

The FDMS-VAV fire dampers are additionally equipped with variable airflow control, as with VAV controllers. The FDMS-VAV dampers have the housing extended by an extension with a measuring cross and a controller. The FDMS-VAV damper is closed only by means of a servo drive.

Damper characteristics:
- CE certification according to EN 15650
- tested according to EN 1366-2
- classified according to EN 13501-3+A1
- fire resistance up to EIS 60
- tightness according to EN 1751, class C via body and class 2 via blade 
- corrosion resistance according to EN 15650
- In the case of FDMS cycling test C 10 000 according to ČSN EN 15650
- In the case of FDMS-VAV cycling test C 20 000 according to ČSN EN 15650
- In the case of FDMS, the damper control is mechanical or by means of a servo drive
- In the case of FDMS-VAV, the dampers are only operated by means of a servo drive
- P-mark certification from the RISE institute in Sweden No. SC1433-17

Faultless operation of the dampers is ensured under the following conditions:
- Maximum air flow speed - 12 m/s.
- Maximum pressure difference on the damper - 2500 Pa.
- The operation of the dampers does not depend on the direction of air flow (circulation). In the case of the FDMS-VAV, the direction of air flow is precisely given.
- The damper can be placed in any position.
- The dampers are designed for air without abrasive, chemical and sticky additives.
- The dampers are designed for macroclimatic areas with a mild climate according to EN 60721-3-3.
- The temperature at the installation site is permitted in the range from -30 °C to +50 °C.

The FDR-Ex circular fire damper is designed to divide fire compartments and prevent the spread of toxic gases, smoke and flames. The FDR-Ex fire damper is an element of passive fire protection and is, together with the method of its installation, an integral part of the assessment of the fire resistance of the building. The FDR-Ex circular fire damper is certified according to ČSN EN 15 560, tested according to ČSN EN 1366-2 and classified for EIS according to 13501-3+A1. The ATEX version is manufactured in accordance with Directive 2014/34/Eu for use in hazardous areas. The FDR-Ex fire dampers are made of galvanized steel sheet and contain lime-silica parts, fire-resistant carbon fiberglass, polyurethane foam and ethylene-propylene rubber.

The FDR-Ex fire dampers are available with manual or actuator operation, in a range of sizes from 100 to 1000 mm.

FDR-Ex fire dampers with manual operation 
The actuation mechanism of the FDR-Ex fire damper is activated when the temperature at the fuse point reaches 74 °C (100 °C on request). In the event of a fire, the damper closes automatically within 10 seconds after the thermal fuse has melted. Once the damper is closed, the damper blades remain locked in the closed position and can only be opened manually.

FDR-Ex servo-drive actuated fire dampers 
The FDR-Ex servo-drive actuated fire damper is equipped with limit switches as standard. The actuator closes the damper on a signal from the building management system (power interruption) or when the thermoelectric temperature sensor exceeds 72 °C. The actuator power circuit is interrupted and the spring closes the damper blades within 20 seconds.

• CE certified to EN 15 560
• Tested according to EN 1366-2
• Classification according to EN 13501-3+A1
• ATEX for gaseous and dusty environments
• II 2D Ex h IIIB T85°C...T100°C Db
• II 2G Ex h IIB T6...T5 Gb
• Manual activation mechanism with IP 44 protection
• Built-in inspection opening

Manual damper activation mechanism

• H0-Ex - zone: 1.2 (Gb) 21.22 (Db)
  Basic damper design, manual activation mechanism with return spring and thermal fuse with activation at 74° C (100° C on request). The mechanism is provided with an IP 44 protective cover.

• H2-Ex - zone: 1,2 (Gb, temperature limit T6) 21,22 (Db, temperature limit T85°C)
  Manual activation mechanism H0 + indication of open and closed position by two limit switches at 230V AC or 24V AC/DC. The limit switches are in ATEX version. The mechanism is provided with an IP 44 protective cover.

Servo-drive damper activation mechanism

• SET-EX - zone: 1,2 (Gb) 21,22 (Db)
  Actuation mechanism with Schischek ExMax actuator with return spring, also equipped with thermoelectric actuation sensor with activation at 72°C. The actuator includes two limit switches to signal the position of the damper blade. Power supply 24...240 V AC/DC.

• SRT-EX - zone: only 2 (Gc); only 22 (Dc)
  Actuation mechanism with Schischek RedMax actuator with return spring, also equipped with thermoelectric actuation sensor with activation at 72°C. The actuator includes two limit switches to signal the position of the damper blade. Power supply 24...240 V AC/DC.

Product Line Data Sheet: FDR-Ex-en.pdf
Product Line Declaration of Performance: FDR-Ex-declaration-of-performance.pdf
ATEX certificate: FDR-Ex-ATEX-certificate.pdf