Tug boat
Wärtsilä Sternguard EK & EJ Seal
A robust and reliable lip seal solution

Wärtsilä Sternguard EK and EJ

Sternguard (formerly known as Manebar) E-series seals are designed for robust and reliable service in small to medium sized vessels such as trawlers, coasters, dredgers, tugs and offshore supply vessels. In oil lubricated systems the seal offers a robust, reliable and cost effective alternative to traditional lip type seals.

Proven dependancy

The Wärtsilä Sternguard E Series seals have over 25 years of proven dependancy in thousands of applications. The inboard and outboard variants are designed to support medium sized vessels including Tugs, Trawlers and Coasters reliably. These seals also meet classification society requirements for wear and corrosion protection, supporting vessels which may operate in silty or abrasive water conditions.

Design reliability is key, which is addressed through the Wärtsilä Sternguard E Series seals as leakage is significantly limited, with easy accommodation towards vibration and axial/radial movements. The seals can be applied with systems using oil or grease with conventional water lubricated bearings. 


Wärtsilä manufacture and supply several variants: the Wärtsilä Sternguard EK, a non-split outboard seal; the Wärtsilä Sternguard EJ, a non-split inboard seal; and the Wärtsilä Sternguard EL, which is a partially split inboard seal. All variants are equipped with the same performance and design features, and are supported with strong but flexible elastomer bodies with integral face inserts. This supports radial and axial movements with the purpose of maintaining seal integrity.
Sternguard E series AFTSeal-661px

Wärtsilä Sternguard EK

Sternguard E-series FWD-661px

Wärtsilä Sternguard EJ

    Contact us

    Please fill in the form if you have an enquiry. Fields indicated with an asterisk (*) are required. We aim to respond within 1-2 business days depending on the scope of your enquiry.

    For an existing installation, please provide the necessary details to identify the installation and the equipment.

    Find your local Wärtsilä office here

    Find your nearest Customer Support Centre here

    © 2020 Wärtsilä