Wärtsilä introduces the Wärtsilä Sternguard In-Water Serviceable Seal – the first seal that can be fully serviced underwater

Wärtsilä Corporation, Trade press release 30 November 2015 at 10:30 UTC+2
  • Wärtsilä-Sternguard-In-Water-Serviceable-Seal

Wärtsilä, the marine and offshore industry’s leading solutions and services provider, introduces an innovative new seal that can be fully serviced underwater, without setting up a habitat. The new Sternguard In-Water Serviceable Seal is the first product of its kind on the market, offering customers increased uptime and lifecycle efficiency.

Wärtsilä Sternguard In-Water Serviceable Seal is a fully split, underwater serviceable seal that minimises overhaul downtime and costs. Designed and built to the highest standards, the oil-lubricated outboard face type seal is available for stern tubes and thrusters. The seal has been designed to provide a smoother, faster service, as well as enhanced overall performance and endurance.

“We are very excited about the Sternguard In-Water Serviceable Seal, as it is the first fully diveable seal on the market. We at Wärtsilä understand that the first priority of our customers is uptime, and they naturally want to avoid unnecessary disruptions. This innovative new seal is yet another Wärtsilä solution to optimise the operations of our customers: overhauls can be carried out underwater for the Sternguard IWSS without having to set up a habitat or even to unload the cargo,” Damian O’Toole, Director, Seals and Bearings from Wärtsilä says.

Flexibility and reliability in the same package

The Wärtsilä Sternguard In-Water Serviceable Seal can be used to retrofit any other type of seal and is available for merchant, offshore, IWW and cruise & ferry vessel types, running on Environmentally Acceptable Lubricants (EALs) or mineral oils. Retrofit and service in dry dock can be carried out without removing the propeller or shaft, and it is not necessary to drain oil from the stern tube for underwater overhaul. The Sternguard IWSS also includes an inflatable emergency seal and inner rope guard for enhanced protection.

“With its easy retrofit and serviceability, this unique new seal offers flexibility of operations to customers across industries. At the same time, additional safety features ensure continuous reliability. Wärtsilä has a long history in designing and manufacturing first-rate seals to answer the needs of each and every customer segment, and the Sternguard In-Water Serviceable Seal is a fresh example of that expertise,” O’Toole concludes.

Link to image
Caption: Wärtsilä Sternguard In-Water Serviceable Seal

Link to image of a Wärtsilä diver
(Courtesy of Marine Works)

For further information, please contact:

Mr Damian O’Toole
Director, Seals & Bearings
Wärtsilä Corporation
Tel: +46 319 28402

Ms Hanna Viita
Director, Marketing
Wärtsilä Corporation
Tel: +358 40 167 1755


Wärtsilä Services in brief
Wärtsilä Services creates lifecycle services for its customers, enhancing their business – whenever, wherever. We provide industry’s broadest range of services for both shipping and power generation. Our solutions range from spare parts and basic support to ensuring maximised lifetime, increased efficiency and guaranteed performance of customer’s equipment or installation – in a safe, reliable, and environmentally sustainable way.

Wärtsilä in brief
Wärtsilä is a global leader in complete lifecycle power solutions for the marine and energy markets. By emphasising technological innovation and total efficiency, Wärtsilä maximizes the environmental and economic performance of the vessels and power plants of its customers. In 2014, Wärtsilä's net sales totalled EUR 4.8 billion with approximately 17,700 employees. The company has operations in more than 200 locations in nearly 70 countries around the world. Wärtsilä is listed on the NASDAQ OMX Helsinki, Finland.