DRO Rotary Kiln Sealing System

The Rotary Kiln Sealing System consists of a mounting flange welded on to the kiln shell. The two connected halves of the split housing engage at the seal disc which is screw mounted to the flange. Depending on requirements, two or four packing rings are provided and a thrust ring presses them against the seal disc.

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Product Description

The DRO Rotary kiln sealing system features a welded mounting flange on the kiln shell that supports a split housing and seal disc assembly. Depending on application needs, two or four packing rings are compressed against the seal disc using a thrust ring and spring‑loaded mechanism to maintain consistent sealing force.
A specially engineered expansion joint accommodates axial thermal expansion and kiln shell movement, while a torque damper prevents rotation of the seal carrier. The system is designed to follow all kiln movement without compromising sealing performance.
The seal disc also compensates for radial deflection—such as ovality—by adjusting its position within the housing to maintain an effective seal.

Advantages
  • Reduced pollution emissions
  • Clean residue combustion
  • No partial temperature reduction below the residue combustion threshold due to air infiltration (no dioxin formation)
  • Safe operation
  • Significant reduction in primary energy consumption
  • Long service life, low wear
  • Predictable downtime (e.g. annual inspection)
  • Available as retrofit on existing systems
Features
  • Packing rings (self-adjusting) with permanent spring-action for optimal, continuous contact with the seal disc, optical wear indicator
  • Can be pressurized with buffer gas
  • Optional dust extraction at the expansion joint
  • Optional flush fitting to remove dust deposits at the seal disc
  • Double-acting seal rings for use with process-compatible barrier gas or to drain toxic or aggressive gas
  • Cutting-edge materials, supports broad range of applications
Materials (metal parts)
  • Steel S235JR (St 37-2 / 1.0037)
  • CrNiMo steel (1.4571)

Technical Specifications

Operating Range
  • Diameter: 400-8000 mm
  • Pressure: -50 to +250 mbar (-0.72 … +3.62 PSI)
  • Maximum process temperature: 1400 °C (2552 °F)
  • Rotational speed: max. 2 m/s
  • Radial movement capability: 50 mm
  • Axial movement capability: 200 mm
Recommended applications
  • Pyrolysis
  • Process industry
  • Petrochemical industry
  • Chemical industry
  • Pharmaceutical industry
  • Toxic, hazardous, chemical media
  • Residue and waste incineration
  • Cement production
  • Calcination