3-way coal dust dampers


Coal dust dampers are used in pipings of coal fired power plants between mills and burners. The purpose of these dampers is to shut-off individually the coal feeding line upstream the burner when the corresponding mill is out of service. The coal dust dampers are of heavy duty design with an optimised flow pattern to prevent deposit formation. In opened position the damper flap is positioned completely out of the dust stream which results in full orifice cross section for less pressure drop.

The damper type KSK-HLK comes with an additional hot-air connection. In closed position of the main damper blade hot air injected ensures automatic cooling and cleaning from remaining dust at the burner port. As a result the burner is protected against illegal high temperatures and the boiler is protected against explosion.

Kohlenstaubklappen Rechteckausführung


Thermal Power Plants

Nominal size:
DN 150 TO DN 800
Operating pressure:
MAX. 0,5 BAR G
Operating temperature:
max. + 300°C


  • Completely unblocked flow cross section
  • Reliable shut-off of the medium due to robust seat sealing system
  • Very short positioning times compared to simple shut-off valves
  • Compact and cost-efficient solution – only one valve instead of two conventional ones


When in its closed position, the flap plate is pressed onto the flap seat by the drive shaft and the internal lever, ensuring a dust-tight shut-off. At the same time, the hot-air connection is opened to cool down the burner gun. When the coal dust flap is opened, the flap plate is moved around 90° and unblocks the entire flow cross section. In this position, the flap plate does not interfere with the flow but seals off the hot air supply completely.

We are happy to serve YOU with more details for your particular installation.

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