GTO Subsea Dredge

The GTO Subsea Dredge is a standalone unit (suction head handled by ROV or diver) for handling of large quantities and difficult material.

GTO_SubseaDredge

Its capabilities allows for subsea excavation, transport and disposal of any sediment and gravel.

The new and enhanced XL and XXL dredgers provides significantly increased suction rate and unrestricted diameter up to 16". The GTO Subsea Dredge can be delivered in standard dimensions 8", 10", 12", 14" and 16". It provides the possibility to transport sediments several hundred meters and to dredge large areas.

The GTO Subsea Dredge can also be customized for dredging of rocks up to 30".

Water jetting nozzles can be installed on the suction head, providing capacity of breaking up very hard sediments. In order to avoid the risk for damages on the ROV manipulator and to optimize handling of suction head, the robust purpose made GTO Dredging Arm may be applied.

 

Technical Specifications

Dredger capacities






Description 8" 10" 12" 12" XL 14" XL 14" XXL 16" XXL
Motor effect t/hr* 95 kW 95 kW 95 kW 190 kW 190 kW 270 kW 270 kW
Removal Capacity t/hr* 40-80 60-160 90-260 120-240 130-260 230-400 240-450
Transport distance Custom Custom Custom Custom Custom Custom Custom
Suction hose ID

200 mm
8"

250 mm
10"

300 mm
12"

300 mm
12 "

350 mm
14 "

350 mm
14"

400 mm
16"
Max stone size

180 mm
7"

225 mm
8"

270 mm
10 1/2"

270 mm
10 1/2"

315 mm
12 1/2"

315 mm
12 1/2"

360 mm
14 1/4"
Water jet on nozzle Yes Yes Yes Yes Yes Yes Yes
Over pressure on jet 16 bar
235 psi		 16 bar
235 psi		 16 bar
235 psi		 16 bar
235 psi		 16 bar
235 psi		 16 bar
235 psi		 16 bar
235 psi
Apprx clay hardness (kPa)** 160-200 160-200 160-200 160-200 160-200 160-200 160-200
Suction hose length Custom Custom Custom Custom Custom Custom Custom

 

* - Under ideal conditions. Depends on operation and type of sediment
** - Also depending on plasticity

Required Power Supply:
 Standard GTO Subsea Dredge: 1x250A fuse + 1x125A fuse (60Hz, 440V)
XL & XXL GTI Subsea Dredges: 2x250A fuse + 1x125A fuse (60Hz, 440V)
16 bar water jetting: 1x125A fuse

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