WKS25 Rectangular Fire Damper

Previous Next
  • WKS25 Rectangular Fire Damper
  • Rectangular Fire Damper WKS25
  • WKS25 Rectangular Fire Damper Dimensions

Image 1/3


​Fire Damper WKS25 is a rectangular fire damper with 25mm thick closing blade made from refractory material for air duct system that penetrate fire resistance walls or floors. This rectangular fire damper has casing leakage performance Class C according to Standard EN 1751:2014 Section C.3.

WKS25 fire damper prevents fire and smoke from spreading through the air duct system. WKS25 rectangular fire damper is tested and classified in accordance with EN 13501-3 and EN 1366-2 with 500 Pa negative pressure and CE marked in accordance with EN 15650.

Rectangular fire damper WKS25 is optimised for small size ducts and reduced installation space with a focus on acoustical and aeraulic performance.

Related Documents

There are no softwares available for download for this particular product.

​Characteristics of WKS25 Rectangular Fire Damper

  • Casing made from galvanised carbon steel
  • Intumescent sealing gasket
  • 25mm thick closing blade made from refractory material
  • Internal frame made with refractory material
  • Thermal labryinth obtained from the casing
  • Opening/closing mechanism with IP42 protection box
  • Intumescent graphite gasket on outside of casing
  • Internal intumescent gasket for hot smoke seal
  • Cold smoke air seal gasket


European Standards and Certification

  • CE Certification - EN 15650
  • Test - EN 1366-2
  • Classification - En 13501-3
  • Thermal Fuse Reliability - ISO 10294-4
  • Air Tightness - EN 1751
  • Resistance to Corrosive Environments - EN 600068-2-52
  • CE Certificate of Constancy of Performance
  • German, Swiss and Swedish Approval
  • NF Certification
  • Fire Resistance Classification According to EN 13501-3