Products and services
Modular dredger 14/12”
Rarely quarries are identical and not always the dredger remains efficient when moved to another working area. There are many conditions which can influence the ability to keep good production rates over the time; often the enlargement of the excavating area which should allow adding precious cubic meters of sand to the extracting activity, doesn’t bring the expected results. Costruzioni Navali, thanks to its experience in this domain, can offer solutions to make the dredger more efficient even in case of “difficult” quarries, where submerged plants or clay layers are present. Sometimes little modifications to the known and consolidated excavating techniques may produce surprising results.
A cutting method, adapted to the type of the bed or the reduction of material waste during the treatment phases, can contribute to remarkable production increases. We produce “tailored” dredgers, using components made by the major worldwide companies:
The more and more demanding market requests lead Costruzioni Navali to set up the spare parts stock in order to minimize the waiting time for the replacement of worn dredging pumps components.
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Engine-reducer-pump group
Special dredgers for excavating
Drain basins
Inerts transformation system
Inerts transformation system
Stationary dredge with milling cutter
Water-jet head
Dredger under construction
Stationary dredge with submerged pump
High percentage of solids
Water-jet dredger
Dredger with interchangeable cutter
Stationary dredge with milling cutter
Auger dredger
14/12 dredger
Stationary dredger for big depths
Dismountable dredger
Control panel
Motor pump group
Water-jet dismountable dredger
All current dredger models can be equipped with anchoring posts and spuds, anchor boom, interchangeable cutter group allowing to switch between the classical cutter and a water-jet system; thus to increase by 20-30% the production of the solid. In case of particular dredging, auger dredgers can be used. On demand, only the “heart” of the dredger can be delivered: diesel engine, clutch, reducer and dredging pump pre-assembled on a basement adapted to the existing hull.
Stationary dredger with on board sieve system build on 15 modular pontoons
Besides building dredgers testes by the main naval classification companies (RINA, Bureau Veritas, Lloyd Register of Shipping, Germanischer Lloyd, Det Norske Veritas, American Bureau, Motorizzazione Civile etc.), Costruzioni Navali produces sieve systems for inert and, thanks to the collaboration with Eurodredging, proposes a new excavating service in outsourcing; the inert is produced , with requested granulometry, directly at Customer’s quarry.
| Dredger type |
Pump type |
Length | Width | Height | Main diesel engine |
Auxiliary engines |
Inert production |
Excavating depth |
Outlet discance |
Mix production |
Outlet height |
|---|---|---|---|---|---|---|---|---|---|---|---|
| CNW | meters | meters | meters | HP | HP | MC/H | meters | meters | MC/H | meters | |
| 150 | WR | 7/15 | 3,50 | 1,2 | 150 | 40 | 22/55 | 3/10 | 250 | 100/270 | 3/5 |
| 200 | 18/45 | 400 | |||||||||
| 200 | MTS | 9/18 | 3,50 | 1,3 | 200 | 40 | 50/115 | 3/12 | 450 | 230/600 | 3/5 |
| 270 | 60/140 | 650 | |||||||||
| 250 | WR | 12/22 | 5 | 1,3 | 250 | 70 | 70/180 | 3/12 | 500 | 350/900 | 3/5 |
| 380 | 75/250 | 800 | 370/1.000 | ||||||||
| 300 | WR | 15/25 | 6 | 1,3 | 450 | 80 | 120/300 | 3/14 | 600 | 600/1.500 | 3/7 |
| 600 | 110/250 | 900 | 550/1.250 | ||||||||
| 400 | MTS | 25 | 8 | 1,3 | 800 | 100 | 380 | 3/14 | 350 | 1.900 | 3/10 |
| 500 | MTS | 26 | 8 | 1,4 | 1.100 | 200 | 625 | 3/12 | 500 | 3.200 | 3/10 |
| 600 | MTS | 26 | 8 | 1,5 | 1.700 | 350 | 1.000 | 3/12 | 500 | 5.000 | 3/12 |
The reported data is indicative and refers to sand having 1.4 t/m3 specific gravity.
In case the extracted inert is to be transferred by ship, the sieve and dewatering systems are installed directly on board of the dredger. The motor ships are loaded by means of belt conveyors with sand free of debris and partly dry. Thus leads to transportation cost optimization, since only ready to sell material is being moved.
| Image | Name | Year | Length | Width | Height | Mix production | Dredging pump | Test |
|---|---|---|---|---|---|---|---|---|
 |
Cn 07 | 2008 | 40 m | 5,50 m | 1,80 m | 700 mc/h | 10/8" | MTCC |
 |
Trebbia | 2006 | 26 m | 6 m | 1,60 m | 1.000 mc/h | 12/10" | MTCC |
 |
ED 250 D-WJ | 2006 | 26 m | 86 m | 1,60 m | 1.000 mc/h | 12/10" | MTCC |
 |
ED 300 D-WJ | 2006 | 28 m | 6,50 m | 1,80 m | 1.500 mc/h | 14/12" | MTCC |
 |
Scrivia | 2005 | 27 m | 6 m | 1,50 m | 1.000 mc/h | 12/10" | MTCC |
 |
Romania | 1998 | 15 m | 4 m | 1,50 m | 650 mc/h | 10/8" | MTCC |
 |
Giulia | 1998 | 15 m | 4 m | 1,50 m | 650 mc/h | 10/8" | MTCC |
 |
Dora | 1988 | 35 m | 6,30 m | 1,80 m | 1.500 mc/h | 14/12" | MTCC |
 |
Guidotti 2 | 1995 | 35 m | 6,30 m | 1,80 m | 1.600 mc/h | 14/12" | MTCC |
 |
Guidotti 1 | 1990 | 45 m | 12 m | 1,80 m | 1.500 mc/h | 14/12" | MTCC |
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