Hands off, self-adjusting, and shell runout compensating seals for rotary equipment


A seal is essential at each end of a rotary unit to prevent ambient air from entering the process. Air leakage can have varying effects on different processes and a leaky seal may reduce efficiency, create unsafe or unstable conditions.

Seals are damaged most by overheating or by physical abuse. Overheating can occur because of insufficient cooling by fans or by insulating them from natural cooling. Physical damage is done by not cleaning seal discharge chute or by running the kiln too slow, causing spillback.

Each seal is designed for the kiln diameter, maximum runout, temperature, and pressure that it needs to isolate. There are many kinds of seals and each offer advantages in their application.

The patented Superdeal® Air Seal and the Goodeal™ Air Seal can be effectively applied to all existing Rotary Kilns, Dryers and Coolers, regardless of manufacturer of the equipment.


  •  Our Seals are hands off, self-adjusting, and shell runout compensating
  •  Reduced Seal maintenance, results in lower operating costs
  • Our Seals can be retrofitted to all existing Rotary Kilns, Dryers and Coolers regardless of manufacturer or application
  • Our seals show greatly reduced air leakage when compared to other conventional seals
  • Lower air leakage reduces power consumption and increases process efficiency
  • Our Seals increase the fuel efficiency of any operating kiln
  • Installation and replacement of our Seals is quick and simple, leading to lower maintenance costs

Superdeal® and Goodeal™ Seals

Metso markets and sells the patented Superdeal® and Goodeal™ leaf type seals.  They give an all-around performance with low maintenance in most rotary kiln systems. 

The Superdeal® seal has applications for rotary kilns, dryers and coolers. Because of its low leakage characteristics, it is cost effective for most applications. Increased fuel efficiency, reduced off gas volumes and environmental compliance requirements are typical considerations for selecting this seal.

The Goodeal™ seal is utilized for less demanding conditions - where some air leakage is acceptable or actually desirable for process performance.

How it works

The  Superdeal® seal consists of a dual layer of overlapping high strength spring steel leaves with ceramic fiber blankets between the layers.  The Goodeal™ seal consists of a single layer of overlapping high strength spring steel leaves.

The overlapping leaves form a seal while allowing the kiln to rotate freely. There are many different ways and reasons to arrange a rotary seal.  The Superdeal® and Goodeal™ seals can be installed in a wide variety of configurations. The configuration on the left shows a standard radial seal configuration. Some other common configurations include:

  • Radial seal with stand off wear ring
  • Inward radial seal
  • Radial seal with air cooling
  • Double radial seal with purge gas
  • Axial seal
  • Inward axial seal
  • Inverted axial seal
Brochure Superdeal and Goodeal for Rotary Equipment - English Download

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