Profiseal - Propeller Shaft Seals and Bulkhead Seals

ProfiSeal specialises in the design and manufacture of propeller shaft seals for governmental, commercial and leisure marine vessels. ProfiSeal is committed to a reputation of quality, reliability and innovation.

PROPELLER SHAFT SEALS

ProfiSeal propeller shaft seals are designed for shafts with diameters ranging from 20mm to 90mm and 100mm to 180mm, and are type-approved by GL, LR and ABS.

They are in use for water and oil-lubricated shaft systems and are installed in a vast number of governmental ships special crafts (such as patrol boats and vessels for police, customs and coastguard), working vessels like pilot boats, and commercial passenger ships, coasters, work boats and yachts.

PROFISEAL PROPELLER SHAFT SEAL ADVANTAGES

ProfiSeal shaft seals require very little maintenance. For aluminium hulls the housing and pneumostop flanges of the seals are also available in aluminium material. The seals are easily installed without the need of further adjustments, and ensure a long lifetime, even in extremely polluted waters. The facetype design of the seals eliminates shaft-wear.

Permitted shaft movements are as follows:

• Allowed axial shaft movement: +/- 5mm
• Allowed radial shaft movement: +/- 2mm

PROPELLER SHAFT SEAL ACCESSORIES

ProfiSeal also manufactures a series of accessories for these shaft seals, including:

• Pneumostop inflatable stand-still seal – this seal is available for shaft sizes from 500mm diameter, and allows the inspection or even repair of the propeller shaft seals while the vessel is floating
• Standard installation flange – for easy installation of the ProfiSeal propeller shaft; this flange aligns and centres the seal with the stern tube, eliminating the need for costly welding or machining processes, specially on smaller boats and shaft sizes up to 50mm

BULKHEAD SEALS

ProfiSeal bulkhead seals are designed for shafts with diameters ranging from 50mm to 400mm, and are type-approved by LR.

They are installed in governmental ships and special crafts like patrol boats, supply vessels, etc., as well as in commercial passenger ships, fast catamarans and yachts.

The unique seal ring balancing-system prevents unnecessary shaft wear. The seals are dry-running gap-seals and allow very high shaft speeds of up to 40m/s. The fully split design allows installation and maintenance without pulling the shaft. ProfiSeal bulkhead seals prevent shaft-surface pitting corrosion.

Permitted shaft movement is as follows:

• Allowed radial shaft movement: +/- 5mm

WATER-LUBRICATED RUBBER BEARINGS

As the German distributor for Icon Polymer UK, ProfiSeal supplies water-lubricated rubber bearings for shaft diameters from 20mm to more than 1,000mm, and gliding speeds from 0.05m/s up to 35m/s. The bearings are accepted by all major classification societies.

The whole range of water-lubricated shaft bearings:

• Are pollution-free
• Ensure low friction losses, low abrasive wear a long lifespan
• Achieve noise and vibration absorption

The bearing shells are manufactured from corrosion-resisting naval brass or synthetic Aqualine material and feature a tough, synthetic rubber lining. Alternative materials are also available.

FLEXIBLE COUPLINGS

ProfiSeal is a competent dealer for CENTA flexible couplings, used for noise and vibration damping in propulsion shaft lines for engine powers of up to 2,000kW. CENTA holds type-approvals from GL, LR, DNV, ABS, BV and RINA.

CENTA-Flex couplings and joint shafts have been designed for the connection of reversing gears and propeller shafts on ships and boats.

The couplings feature an elastic torsion that dampens potentially damaging vibrations produced by the engine. Furthermore, the couplings, which are electrically insulating, compensate for all types of misalignments, reducing wear on the shaft bearings and gearbox.

REFERENCES

ProfiSeal's list of references includes:

Fassmer, Lürssen, FSG, Gebr. Friedrich, LUX-Werft, Bodan, Benetti, AR-Naval, Derecktor, Gdynia Naval Ship Yard, San Lorenzo, Työvene Oy, Piening, Schaffran, and Thies Propeller.

ProfiSeal is a member of the German Boatbuilders Association (DBSV), and the German Yacht Industry Pool Deutsche Yachten, specialising in the super-yacht sector.

For more information on any of our products, please contact: