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CU-LT+MFUSP • Rectangular fire damper EI120S

  • Fire dampers
  • Rectangular
  • EI120S
  • With fuse 72°C
  • EN1366-2
  • LxH: 200x100 – 800x600

Rectangular fire dampers with a fire resistance of 120 minutes. When the temperature in the damper rises above 72 °C the fusible link will break and the damper will close. When closed, the expanding material around the fireblade will swell and assure a fire and smoke-tight seal against hot air and smoke. The thin blade is made out of fire resistant calciumsilicate and ensures a relatively high net opening in the damper. The CU-LT + MFUSP fire dampers have a manual operating mechanism with indication of the blade position.

Optionally, an end and begin of range switch FDCU MFUS can be added to the mechanism.

For mounting in flexible wall, option +IFW is required. This is a mounting frame that is pre-mounted onto the damper, and ensures its good working when mounted in a flexible wall.

Application

  • Fire compartimentation
  • To close and seal off ventilation ducts in case of fire
  • Range from 200 to 800 mm in width and 100 to 600 mm in height

Material

  • Calciumsilicate blade
  • Steel tunnel

Construction

Composition

  • Steel housing
  • Calciumsilicate fireproof blade
  • Swelling seal around the blade
  • Manual control mechanism MFUSP mounted on the height side with fusible link 72 °C
  • Standard equipped with duct connection flages of 20mm
  • Please note at height 100 mm, the operating mechanism of 150 mm (see drawing)

  • 1. Refractory casing made of galvanised steel
  • 2. Damper blade
  • 3. Operating mechanism with transmission
  • 4. Sealing cold smoke
  • 5. Intumescent strip
  • 6. Positioning plate
  • 7. Connection frame PG20

Mounting

  • To be inserted in fire resistant walls or floors and to be fixed with mortar
  • To be connected with rectangular air ducts by flanges of 20 mm
  • Flanges have oval holes at the corners of 8,5 x 16 mm
  • to be mounted according to the delivered mounting instructions with the valve

Certification

  • Classified EI90(ve,ho i<->o)S at 300Pa according EN 13501-3 in ridid wall and rigid floor fixed with mortar
  • Classified EI120(ve,ho i<->o)S at 500Pa according EN 13501-3 in ridid wall and rigid floor fixed with plaster
  • Classified EI90(ve i<->o)S at 300Pa according EN 13501-3 in flexible wall with IFW
  • Certified with test report Efectis 09-A-159 / EFR-19-005414 or WFRG 16129
  • Airtight EN 1751 class C
  • CE marked

Accessories

  • Build-in kit for flexible wall, type IFW
  • End and begin of range switch, type FDCU (available as KIT or premounted)

Other available products

  • For bigger sizes see CU2 + CFTH

Text for tender

Copy
  • The fire dampers shall be of the rectangular type with a fire resistance of 120 minutes, certified according to EN13501-3. They will consist of a fireproof Steel tunnel and calciumsilicate valve. The control mechanism will be manually operated and shall have a blade position indicator and fusible link of 72 °C
  • CAIROX type CU-LT + MFUSP

Order example

  • CU-LT+MFUSP, 200, 100

Explanation

CU-LT = Rectangular fire damper

MFUSP = Mechanism

200 = Length damper

100 = Height damper

Quick selection

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Symbols and specifications

  • Ak = Effective area in m²
  • v = Air velocity in the duct in m/s
  • Q = Air volume in m³/h
  • Vk = Effective velocity through the damper in m/s
  • Ps = Static pressure in Pa
  • Lw(A) = Acoustic power in dB(A)
  • LxH = Duct size in mm

Dimensions

PQ (H<200)Q (H≥200)Z (H<200)Z (H≥200)xy

CU-LT+MFUSP

1031251206295 (H-6)/2-70 (H-6)/2-230
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