Liquidyne® pump shaft seals

Released in 1983, the water-lubricated Liquidyne pump shaft seal was initially intended for heavy-duty dredge pumps. Thanks to its robust design, the seal can handle above-average axial and radial play. It is suitable for pumps that have to deal with severe shocks and vibrations, incorrect alignment and abrasive media. The Liquidyne increases the pump’s lifetime and leads to a longer mean time between maintenance (MTBM) thanks to its robustness. Condition monitoring adds predictability and makes your operation more secure.

The Liquidyne® is a sealing solution that needs to be flushed during heavy-duty operations, such as when dealing with abrasive media. For situations in which no flush supply is present, Lagersmit has developed a Closed Loop Lubrication Unit (CLLU) to circulate the external flush medium. Circulating the flushing medium minimises the total consumption of the seal and increases the durability of the Liquidyne seal, as flush water is filtered.

Curious about the differences between the Liquidyne, gland packing and a mechanical seal? Read it in our blogs!


  • predictable lifetime
  • energy savings
  • safe workplace
  • easy to maintain

The Liquidyne has a predictable lifetime due to the condition monitoring function. In addition, the pump shaft seal is also environmentally friendly thanks to the water-lubricated system that saves energy through reduced friction on the shaft.

Liquidyne pump shaft seal installed at pump


Liquidyne 2-Stage

The standard design of the Liquidyne range that's used in pumps that process relatively clean media.

More information

Liquidyne 3-Stage WA

Especially for pumps that process water containing a relatively large number of abrasive particles or particles larger than 100 micron.

More information

Closed Loop Lubrication Unit

Circulates external flush medium. Developed for situations in which no flush supply is present.

More information

24/7 service

At Lagersmit, you can count on 24/7 worldwide support for installation and maintenance of your seal. Our service engineers are your sealing experts and can be on site within 48 hours.



  • 24/7 available
  • on location within 48 hours
  • certified engineers
Lagersmit Service Team

Our figures


Founded in 1856


Based in the Netherlands


24/7 worldwide service & spare parts


More than 50,000 seals delivered

About Lagersmit

Lagersmit has been based in the Netherlands since 1856 and has one mission: to deliver Peace of Mind with the best sealing solutions for ships, pumps and tidal turbines. Examples of applications include seals for ship’s propulsion shafts, thrusters, gearboxes, tidal turbines and pump shafts. From its high-tech production location in Alblasserdam, Lagersmit serves the worldwide maritime, dredging, tidal energy, water management and industrial markets with high-quality sealing solutions. The company’s network of offices, agents and service stations covers the entire world.


Do you want more information or advice about how our seals can be used for your mining applications? Contact one of our experts!

Team Member

Jan Willem Bongers

Sales Manager

Team Member

Eric de Paauw

Account Manager

Team Member

Nicolette van Houwelingen

Customer Support

General phone number