Liquidyne® and Supreme® seals

When it comes to dredging equipment, reliability is the key. You need to keep the dredging process going 24 hours a day, 7 days a week. The water-lubricated Liquidyne® seal was initially developed for heavy-duty dredge pumps. Besides having a stable dredger pump, it is also important to keep your dredging vessel going. To make this possible, we supply our own propulsion and cutter shaft Supreme® seals.


Both Liquidyne and Supreme seals were specially developed for the dredging industry where superb durability matters the most. Use the Liquidyne and Supreme combination in your dredging operation and take the next step in reliability and performance. You can find our sealing solutions for dredgers on the following applications:

  • Dredge pumps
  • Slurry pumps
  • Jet pumps
  • Booster pumps
  • Process pumps
  • Deep well pumps
  • Cooling-water pumps
  • Bulkheads
  • Cutter ladders
  • Thrusters
  • Stern tubes

Download dredging brochure

Discover a complete overview of all Liquidyne seals, Supreme seals and additional products.


Dredging Cutter Suction Dredger

Liquidyne® pump shaft seals

The Liquidyne pump shaft seals are specially designed to cope with severe shocks and vibrations, wrong alignment and abrasive media. The condition of the seal can be monitored so you know exactly how long you can continue dredging.

Supreme® propulsion seals

Our Supreme seals deliver a plus to your dredger’s propulsion system. We believe a stern tube seal should deliver top performance, keep you going and offer you Peace of Mind.

Additional products

Flow meter

Monitors the Liquidyne seal and pump condition

More information

Settling pipe

Self-regulating and self-cleaning filter means outboard water can be used as flush water

More information


Prevents flooding of the seals to adjacent compartments in the unlikely event of an accident

More information

Cutter gear bulkhead

Safeguards the CSD’s cutter gear machine room

More information

Pump gear bulkhead

Safeguards the CSD’s pump gear machine room

More information


Due to the modular design, you can customise your seal using a broad range of options.

  • Hard metal layer coating (recommended)
  • Dirt barrier
  • Hastelloy® C4 springs
  • Net cutters
  • Wire winders
  • Oil collector ring (ocr)

Spare parts

Is your seal experiencing leakage or are the wearing parts due for replacement? Our spare parts are in stock and can often be sent the same day! Please contact our sales department for specialist advice!


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

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.

Our figures


Founded in 1856


Based in the Netherlands


24/7 worldwide service & spare parts


More than 50,000 seals delivered


Do you want more information or advice about how our seals can be used for your dredging 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