Vulkan RATO-S Couplings Featured On ARCO Tankers

The new ARCO Millennium Class Tankers are designed to meet or exceed the latest ABS rules with double bulkheads and twin-engine rooms with a continuous bulkhead from the keel to the top of the stack and twin rudders.

Each engine room is designed and equipped as a separate, independent space. ARCO Marine will operate with these double hull tankers for the weekly 2,400 mile round trip voyage from Valdez/Alaska to Cherry Point,Wash, for Alaskan crude-oil transportation.

The Millennium Tankers are being built at Litton Avondale Shipyard. The main propulsion engines are from Manises Diesel Engine, Madrid, Spain. They are two-stroke MAN B&W 7S50MC - C delivering continuous power of 11,060 kW at 127-rpm.

The engines are lighter and shorter while delivering higher power rating.

Renk secured the contract from Manises for the delivery of the complete PTO plants. Connected with the engines through Vulkan RATO-S 7331 flexible couplings is one BSL 225 Renk PTO gear unit each to drive a generator, capable of developing at 1,200 rpm an electrical output of 8,600 kW for onboard requirements, i.e.

especially for the cargo pumps. The propeller thrust bearings are arranged separately and comprise a redundant hydraulically operated disk clutch (Renk patent) for separating or connecting the main engine and propeller in operation. The main reason Vulkan Couplings were chosen is the excellent torsional vibration characteristic of the RATO-S Coupling.

Circle 399 on Reader Service Card

Maritime Reporter Magazine, page 52,  Jun 15, 2000

Read Vulkan RATO-S Couplings Featured On ARCO Tankers in Pdf, Flash or Html5 edition of June 15, 2000 Maritime Reporter

Other stories from June 15, 2000 issue


Maritime Reporter

First published in 1881 Maritime Reporter is the world's largest audited circulation publication serving the global maritime industry.