Innovation (1) – a sealing solution for open water lubricated systems which is in line with VGP regulations

Regulations are getting more and more strict when it comes to the environment. The VGP (Vessel General Permit) is just an example, but an important one on why vessels change their oil from mineral to EALs, or retrofit to an air type seal. Lagersmit always works hard on making more environmental friendly sealing solutions for their customers and is pleased to now offer water lubricated seals in line with VGP! In this blog we will introduce the Water Lubricated FWD seal. Find out more about how this seal delivers you peace of mind.

The Water Lubricated FWD seal

The Water Lubricated Supreme® FWD seal is especially developed to prevent water leakage from your open water lubricated stern tube system into your machine room.

Outboard water will be pumped through water lubricated journal bearings towards the propeller. In outboard water, abrasive particles are present and it is advisable to filter this before it is pumped through your stern tube. Nonetheless, the materials of the more vulnerable parts of the seal have been optimised to be more wear resistant. High wear resistant NBR lip seals run on a corrosion- resistant liner with a hardened surface, to enlarge the seals’ average time between maintenance. Through the proven technology and state of the art design of the Supreme® radial lip seals, large axial shaft displacement is allowed, without compromising the functioning of the seal.

The seal is modified with a stainless steel fresh water tank to provide lubrication for the outermost lip seal. Via level switches on this tank, status monitoring of your lip seals is provided giving you an early warning of possible problems – before any real damage is done. This is called Condition Monitoring.

It is also equipped with an inflatable safety seal, which can be activated in case in situ maintenance is due while afloat. During maintenance the seal can be manually adjusted radially for a perfect shaft-to-bore alignment, giving you a reliable sealing solution for years to come.

Help us find a name!

The Water Lubricated Supreme® FWD seal is not the official name of this new seal.

Do you have a great name for this seal? Feel free to let us know!


Summarised: the benefits!

  • Environmentally friendly solution in line with VGP regulations
  • Extra safety through the incorporated inflatable seal
  • Condition Monitoring
  • Allows for in situ maintenance
  • Optimised and extended seal lifetime
  • Repositionable to realign with shaft

Curious how these benefits are made possible?

Interested in more information?

Contact Jan Willem Bongers to see how we can help you!

About the author: Pepijn Swarte

Pepijn studied industrial design engineering at the Delft University of Technology and at The Hague University of Applied Sciences. He has been working for Lagersmit since 2013 and as Product Manager he is responsible for the research and development activities of the Supreme seals.