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HYDREX INSTALS PROPELLER CONE FINS WITHOUT WAITING FOR DRYDOCKING

HYDREX INSTALS PROPELLER CONE FINS WITHOUT WAITING FOR DRYDOCKING

Monday, May 17, 2021 

Underwater repair company Hydrex says it can install energy-saving propeller cone fins on vessels while afloat, enabling owners to immediately benefit from fuel savings without having to wait for the next scheduled drydocking.

The company recently carried out two such projects on chemical tankers: one in Antwerp and one in Rotterdam. Both operations were carried out with the company’s dive support workboats. The propeller caps can recover energy loss of a propeller hub vortex in the propeller’s slipstream. This decreases fuel consumption from 3% up to 5% according to the manufacturers and reduces cavitation on rudders and hulls.

Hydrex says it can install propeller cone fins underwater on any size and make of propeller, on both new build or in-service vessels. Work is carried out following the specific procedures required by the involved OEM, adapted for an underwater installation.

After a preliminary inspection the divers remove the propeller cap and clean the flange where the device is to be installed. They then lower the propeller cone into the water and position it on the propeller. The bolts are put on the correct torque and secured. Hydrex teams can work in shifts around the clock to finish the operation as quickly as possible.

The owner of the vessel can start enjoying the fuel savings the propulsion improving device creates right away. Not having to wait for the next scheduled drydocking to have the propeller cone fin installed can win him up to four years of fuel savings. In contrast, he will have earned back the cost of the underwater installation in only a few months. According to Hydrex, the savings can be considerable.

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