Clamshell Dredgers

ROHR-IDRECO floating clamshell dredgers are designed to extract sand and gravel from 10 to 60 or even 90 metres below water level. All dredgers are custom-built to the requirements of each deposit and the needs of every customer.

Customers can choose among various components for on-board processing, such as double or single-deck screening machines, crushers, fine sand recovery, conveyor belts or hydraulic transportation to site. Two types of hydraulic motor grabs manufactured in-house complete the package and make the dredger an efficient tool for every purpose.

Catamaran with Processing Plant or for Automatic Barge Loading.

Grab capacity	5-15 m3
Carrying capacity	18-55 t
Lifting speed under water	110-120 m/min
Lifting speed above water	75-90 m/min
Lowering speed above water	75-120 m/min
Lowering speed under water	150-180 m/min
Dredging depth hydraulic grab	10-100 m / 180 m (rope grab)

→Download technical specifications

Catamaran with Processing Plant or for Automatic Barge Loading.

Grab capacity	4.2-12 m3
Carrying capacity	14-45 t
Lifting speed under water	110-120 m/min
Lifting speed above water	75-90 m/min
Lowering speed above water	75-120 m/min
Lowering speed under water	150-180 m/min
Dredging depth hydraulic grab	10-100 m / 180 m (rope grab)

→Download technical specifications

Catamaran with Processing Plant or for Automatic Barge Loading.

Grab capacity	4.2-6 m3
Carrying capacity	14-22 t
Lifting speed above water	70-90 m/min
Lowering speed above water	70-120 m/min
Lowering speed under water	70-160 m/min
Dredging depth	10-60 m