Sound and smoke insulation attachment (SRV)“System Wichmann“® - for EI90 Cable Boxes 270 and 350

Title: Sound and smoke insulation attachment (SRV)

The Sound and smoke insulation attachment (SRV) consists of an enclosure made of sheet steel being filled with meshing foam layers. The SRV is manufactured according to the respective size of the EI90 Cable Box 270 or 350 and is fixed at least on one side to the wall. With the Sound and smoke insulation attachment the installed EI90 Cable Box is extended by approximately 15 cm. The cables being laid through the EI90 Cable Box are laid between the meshing foam layers of the SRV that interlock exactly into each other. By closing the top of the SRV with a tension lock, the offset surfaces of the foam layers enclose the inserted cables in a way that they are sealed against smoke and sound transmission. The free interior of the EI90 Cable Box is filled with EasyFoam stoppers and all remaining openings in the cable box are sealed smoke-proof with a permanently flexible sealant such as silicone or acrylic.

The depth of the SRV is always 15 cm. The installation is done according to the enclosed installation instructions.

The following requirements are fulfilled by the Sound and smoke insulation attachment “System Wichmann“®:

  • Fire resistance class EI90 in accordance with EN 13501 when installed in front of an EI90 Cable Box
  • Approved for all types of sheathed cables with a diameter up to 80 mm and for cable bundles
  • Approved for flexible and inflexible electrical installation conduits according to EN 61386 with a diameter up to 63 mm, with or without cables
  • Certified sound reduction index of the overall construction without any cables Rw in dB 63
  • Certified sound reduction index of the overall construction being filled 50% with cables Rw in dB 63
  • Certified sound reduction index of the overall construction being filled 100% with cables Rw in dB 62
  • Subsequent installations can be made easily and completely dust-free

Manufacturer:

Wichmann Brandschutzsysteme GmbH & Co. KG

Siemensstraße 7

D-57439 Attendorn

Tel: +49 (0)2722 6382-0, Fax: +49 (0) 2722 6382-29

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