The U.S. Environmental Protection Agency ruled in December 2013 that vessels over 24m (79ft) must adopt environmentally acceptable lubricants in all oil-to-sea interfaces before their next drydocking, recommending that seawater lubricated bearings be used in propeller shaft lines.
David Marshall, Thordon Bearings Senior Regional Manager, said: “This order is one of the most important commercial ship contracts we have ever received for the COMPAC solution. Not only does it provide us with a number of significant ‘firsts’, it shows that liner companies trading in US waters are taking the new VGP rules very seriously. That Matson has become the first liner company to make the switch delivers confidence to the market that seawater-lubrication is the only environmentally and commercially acceptable solution to operational oil pollution.”
Each 259m long, DNV GL classed vessel features double hull fuel tanks, a freshwater ballast system and an energy-efficient hull form and a dual-fuel propulsion system future-proofed for conversion to LNG. Main engine output is rated at 38,000kW at 84rev/min to deliver a service speed of 23kts.
Thordon’s scope of supply includes COMPAC elastomeric bearings with a tapered keyset, a Thordon Water Quality package, bronze liners and Thor-Coat shaft coating, meeting classification requirements for extended shaft withdrawal periods.
When delivered from the Aker Philadelphia Shipyard in the third and fourth quarters 2018, the Aloha newbuilds will enter service on Matson’sWest Coast-Hawaii route in anticipation of an increased demand for higher cargo capacity and diversity.
Source: Thordon Bearings