Steerable thruster approved before production

24 Oct 2014
Illustration of the Wärtsilä WST-14 thruster

Illustration of the Wärtsilä WST-14 thruster

Wärtsilä reports that DNV GL has issued approval for the design of its WST-14 thruster, indicating that the design fully complies with the classification rules.

The company believes this to be exceptional because this design has not yet entered full series production.

The WST-14 is part of the Wärtsilä Steerable Thruster (WST) compact series, aimed primarily at tugs, AHTS and coastal and inland waterway cargo vessels. The company says that the benefits include higher performance, easy installation, a high degree of integration, and ice class compatibility. It is designed in compliance with environmental regulations such as the US EPA VGP 2013 requirements.

For the newest WST portfolio, Wärtsilä said it began the type approval process from the earliest possible moment, which should allow significant cost savings as well as reductions in production time. DNV-GL approval of the prototype design is said to be an important step towards full type approval, and confirmation that the design calculations meet class requirements regarding standard operations, as well as for operations in ice conditions (ice class certification). A WST-14 prototype is being built at Wärtsilä’s plant in Wuxi, China, and will be shipped to Tuusula, Finland for testing and validation.

"This exceptional approval provides further evidence of the quality of Wärtsilä's technology development. The fact that the WST-14 thruster design has been already approved will serve as an assurance to the customer that he is buying a product that already meets classification requirements. Furthermore, the approval emphasises the design quality of our entire new thruster portfolio, and is a clear signal to the market of the robustness built into each Wärtsilä thruster," said Wim Knoester, director, sales and project management, propulsion business line, Wärtsilä Ship Power.

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