New- Heat Reduced Shaft Seal

Over the last 4 years, RM Support checked 100 broken shaft seals. The majority of them were damaged by thermal or chemical attack as a result of overheating. Read about this research here.

The lifespan of a shaft seal is also much shorter than years ago. In the 1980s and early 90s a mechanical shaft seal could serve from five up to ten years. Today, we experience only 1 year of service. Keep in mind that the design of a shaft seal didn’t change at all over that time.

It is obvious that there is a clear need for a more reliable solution. RM Support as a developer of a double shaft seal has experience in innovative shaft seal solutions. Therefore we decided to design a modern, single shaft seal with a greater heat resistance.

The requirements for a “new” shaft seal:

To avoid damage, the modern seal must to be able to handle:

  • Change in temperature
  • Change in pressure(wider range)
  • Generate less heat to avoid overheating
  • Handle changes in drive speed
  • Handle a wide range of refrigerant and oils
  • Easy mounting
  • And in these times be environment friendly (no use of heavy metals antimony)

shaft-sealThe heat resistance of the new shaft seal comes from the newly developed composite material. This material provides a hardened surface with a unique topography for increased interfacial lubrication.
The shaft seal will produce 60% less heat than a “normal” shaft seal. The friction is reduced and sealing capacity is still the same. We called it an HR shaft seal - Heat Reduced shaft seal.

The HR shaft seal is a a cartridge type seal, so in the future it is only the wear parts that can be changed. The other characteristics are: easy mounting, low friction and long life materials.

The HR shaft seal can be 100% recycled by our RM seal change service, which is similar to our double seal with pre-warning system

On market request the HR shaft seal will be available in 2011-2012. However, for compressors from the Howden WRV range, Sabroe128-163 range and the GEA Grasso M, it will be available June-July 2010.

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