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A Cutter Suction Dredger (CSD) is a highly versatile, stationary dredging vessel designed to excavate hard soils, rock, sand, and clay. Its core components are a powerful, rotating cutter head mounted on a ladder at the front, a suction pipe running through the ladder, and centrifugal pumps. The cutter head loosens and fragments the seabed material. Simultaneously, the suction pipe, positioned close to the cutter, draws the loosened mixture (slurry) into the pipe. Powerful dredge pumps then transport this slurry over long distances through a floating pipeline to a designated disposal site, such as reclamation areas, deep ocean locations, or designated containment facilities. CSDs anchor themselves using a spud pole at the stern and swing winches attached to anchors or spud carriages on the sides, allowing them to excavate methodically in an arc. They excel in precision dredging projects requiring removal of challenging materials.
iTECH is supplying cutter suction dredger, jet suction dredger, potable suction dredger and Amphibious Multifunctional Dredger, manufacture and services in dredging vessels, dredging equipment and accessories in dredging business, Collaboration in partnering with clients, communities, and suppliers worldwide to establish dredging business relationship.
CSDs are fundamental tools in major marine construction and maintenance projects worldwide:
Port & Harbor Development/Deepening: Creating new basins, deepening access channels and berths for larger vessels.
Land Reclamation: Providing vast quantities of sand and fill material for creating new land (airports, industrial zones, urban expansion).
Canal Construction & Maintenance: Building new canals (e.g., Suez, Panama upgrades) and maintaining existing ones.
River Training & Flood Control: Deepening, widening, and straightening rivers to improve flow capacity and navigation.
Coastal Protection & Beach Nourishment: Mining offshore sand for replenishing eroded beaches and building coastal defenses.
Pipeline & Cable Trenching: Cutting precise trenches on the seabed for infrastructure installation.
Environmental Dredging: Precise removal of contaminated sediments for remediation (requires careful controls).
Mining: Extracting valuable minerals like tin, diamonds, or gold from underwater deposits.
The term "Cutter Suction Dredger 300" typically refers to a CSD model characterized by its dredging performance in discharge diameter, which is approximately 300mm inner discharge diameter.
The "300" in CSD300 typically refers to the dredge output discharge diameter. This naming convention indicates the size/power class of the dredger:
CSD = A stationary dredger that cuts, sucks, and pumps sediment via pipelines.
CSD300 = Cutter suction dredger with a ~300 mm dredge output discharge diameter .
| Model | Dredging Capacity | Dredging Depth | Suction/Discharge Pipe Dia. | Engine(s) Power |
| CSD-200 | 500 m3 /hr | 1-5 m | 200/200 mm | 160-300 kw |
| CSD-250 | 800 m3 /hr | 1-8 m | 250/250 mm | 200-400 kw |
| CSD-300 | 1200 m3 /hr | 1-12 m | 300/300 mm | 400-600 kw |
| CSD-400 | 2200 m3 /hr | 1.5-14 m | 400/400 mm | 700-1200 kw |
| CSD-500 | 3500 m3 /hr | 1.5-15 m | 600/500 mm | 1100-1600 kw |
| CSD-650 | 5000 m3 /hr | 1.5-18 m | 650/650 mm | 2200-2500 kw |
| CSD-700 | 7000 m3 /hr | 1.5-20 m | 750/700 mm | 2800-3500 kw |
Key Characteristics: Excavation depth range ~10-15m, total installed power 400-600 kW, capable of handling medium-hard soils (stiff clay, weathered rock, dense sand), often equipped with a standard cutter head, and transported in sections for assembly on site. Ideal for port maintenance, medium-scale reclamation, and river projects.
Cutter Suction Dredger Design:Cutter suction dredger CSD design focuses on efficient excavation, material transport, stability, and maneuverability:
Hull/Pontoon: Provides buoyancy and stability, often flat-bottomed.
Ladder: A strong, inclined structure lowered from the bow, supporting the cutter head, suction mouth, and often underwater pumps.
Cutter Head: Rotating assembly with cutting tools (teeth, blades, picks) tailored to the soil type. Driven by a powerful cutter drive (electric or hydraulic).
Suction Pipe & Mouth: Positioned immediately behind the cutter head to intake the loosened slurry.
Dredge Pumps: Centrifugal pumps (1 or more onboard and/or 1 underwater pump near the suction mouth and ) create vacuum for suction and pressure for pipeline transport.
Discharge Pipeline: Floating or submerged pipes carrying slurry to the disposal site.
Spud System: A central spud pole (working spud) lowered at the stern acts as a pivot point.
Swing winches connected to side anchors or auxiliary spuds ("spud carriages") pull the vessel in an arc around the working spud.
Bridge & Control Room: Houses navigation, dredging process control, and monitoring systems.
Power Plant: Diesel engines or generators providing power for all systems (cutter, pumps, winches, thrusters, hotel load).
Key features defining CSDs:
Ability to Cut Hard Materials: Unique capability to fragment rock, stiff clay, and consolidated soils via the rotating cutter head.
Precision Excavation: Can dredge specific slopes and profiles accurately using advanced positioning and depth control.
Continuous Operation: Excavates, sucks, and pumps material in a continuous process.
Long-Distance Transport: Capable of pumping slurry over very long distances (kilometers) via pipelines.
Stationary Dredging Method: Anchors via spud and swings in arcs, allowing thorough coverage of an area.
Versatility: Adaptable to a wide range of soil types and project types through cutter head and tool changes.
Self-Contained: Carries its own excavation, pumping, and positioning equipment.
China is a global leader in the cutter suction dredger CSD market:
Major Manufacturers: CCCC (China Communications Construction Company) subsidiaries dominate, notably Shanghai Zhenhua Heavy Industries (ZPMC) and CCCC Tianjin Dredging Co., Ltd.. Others include CSSC, HDEC.
Scale & Innovation: Build the world's largest and most powerful CSDs (e.g., Tian Kun Hao - 6600kW cutter, 35m depth). Invest heavily in R&D for automation, efficiency, and cutter technology.
Domestic Demand: Massive domestic infrastructure projects (Belt & Road, port expansion, island building in SCS) drive demand and provide real-world testing grounds.
Global Exporter: Chinese-built CSDs are exported worldwide, competing strongly on price and technology. Supply vessels for major international dredging contractors and foreign governments.
Technological Prowess: Develop advanced features like intelligent dredging control systems, heavy-duty rock cutting heads, and eco-friendly designs.
State-Backed: Significant government support fuels the industry's growth and global competitiveness.
Cutter Head: Hardened steel blades with adjustable rotation (0–30 RPM) for tough sediments.
Pump System: 500 kW centrifugal pump with 1200-1500 m³/hour slurry capacity.
Positioning: Dual spud poles and winches for precise positioning (±0.5m accuracy).
Power: Marine diesel (CAT/Cummins/Weichai/Mitsubishi /DEUTZ) engine with low fuel consumption.
Control: Automated ICS (Integrated Control System) with real-time monitoring.
Safety: Anti-collision sensors, emergency shutdown, and corrosion-resistant coatings.
Efficiency: Excavates1200-1500m³/hour, reducing dredging time by 40% comparing with excavator.
Versatility: Adapts to varying sediments via replaceable cutter teeth.
Mobility: Modular pontoons for quick disassembly and transport,
Eco-Friendly: Minimizes turbidity with enclosed slurry systems.
Low OPEX: Automated controls cut labor costs; durable components reduce maintenance.
Heavy-duty, high concentration ratio, excellent particle allowance, and long discharge distance
Hydraulic System: Optimal configuration of power and hydraulic unit (less operating costs)
Double powerful auger drive (infinitely for- and backward)
High working range of the outrigger dredging ladder
Efficient design in Cutter suction head can be changed for different situation
Easy access to all parts, especially the dredge pump wearing parts
Freshwater cooling system
Safe and easy to operate
Customized design: Can be designed and fabricated according to your requirements
The cutter suction dredger CSD300 can be applied in diverse environments field:
Ports & Harbors: Maintains navigation channels by removing situation and deepening berths.
River Management: Restores water flow through desilting, prevents flooding, and rehabilitates ecosystems.
Land Reclamation: Extracts seabed materials for coastal infill projects, creating stable foundations for construction.
Mining & Aggregates: Harvests sand, gravel, and precious minerals from riverbeds or offshore deposits.
Environmental Remediation: Cleans contaminated sediments (e.g., industrial sludge) via precision dredging.
Infrastructure Projects: Prepares trenches for pipelines/cables and constructs irrigation canals.
Its compact size allows access to confined areas like marinas or reservoirs, while robust performance suits large-scale coastal engineering. Real-time monitoring ensures minimal ecological disruption, making it ideal for sensitive zones.
A Cutter Suction Dredger (CSD) is a highly versatile, stationary dredging vessel designed to excavate hard soils, rock, sand, and clay. Its core components are a powerful, rotating cutter head mounted on a ladder at the front, a suction pipe running through the ladder, and centrifugal pumps. The cutter head loosens and fragments the seabed material. Simultaneously, the suction pipe, positioned close to the cutter, draws the loosened mixture (slurry) into the pipe. Powerful dredge pumps then transport this slurry over long distances through a floating pipeline to a designated disposal site, such as reclamation areas, deep ocean locations, or designated containment facilities. CSDs anchor themselves using a spud pole at the stern and swing winches attached to anchors or spud carriages on the sides, allowing them to excavate methodically in an arc. They excel in precision dredging projects requiring removal of challenging materials.
iTECH is supplying cutter suction dredger, jet suction dredger, potable suction dredger and Amphibious Multifunctional Dredger, manufacture and services in dredging vessels, dredging equipment and accessories in dredging business, Collaboration in partnering with clients, communities, and suppliers worldwide to establish dredging business relationship.
CSDs are fundamental tools in major marine construction and maintenance projects worldwide:
Port & Harbor Development/Deepening: Creating new basins, deepening access channels and berths for larger vessels.
Land Reclamation: Providing vast quantities of sand and fill material for creating new land (airports, industrial zones, urban expansion).
Canal Construction & Maintenance: Building new canals (e.g., Suez, Panama upgrades) and maintaining existing ones.
River Training & Flood Control: Deepening, widening, and straightening rivers to improve flow capacity and navigation.
Coastal Protection & Beach Nourishment: Mining offshore sand for replenishing eroded beaches and building coastal defenses.
Pipeline & Cable Trenching: Cutting precise trenches on the seabed for infrastructure installation.
Environmental Dredging: Precise removal of contaminated sediments for remediation (requires careful controls).
Mining: Extracting valuable minerals like tin, diamonds, or gold from underwater deposits.
The term "Cutter Suction Dredger 300" typically refers to a CSD model characterized by its dredging performance in discharge diameter, which is approximately 300mm inner discharge diameter.
The "300" in CSD300 typically refers to the dredge output discharge diameter. This naming convention indicates the size/power class of the dredger:
CSD = A stationary dredger that cuts, sucks, and pumps sediment via pipelines.
CSD300 = Cutter suction dredger with a ~300 mm dredge output discharge diameter .
| Model | Dredging Capacity | Dredging Depth | Suction/Discharge Pipe Dia. | Engine(s) Power |
| CSD-200 | 500 m3 /hr | 1-5 m | 200/200 mm | 160-300 kw |
| CSD-250 | 800 m3 /hr | 1-8 m | 250/250 mm | 200-400 kw |
| CSD-300 | 1200 m3 /hr | 1-12 m | 300/300 mm | 400-600 kw |
| CSD-400 | 2200 m3 /hr | 1.5-14 m | 400/400 mm | 700-1200 kw |
| CSD-500 | 3500 m3 /hr | 1.5-15 m | 600/500 mm | 1100-1600 kw |
| CSD-650 | 5000 m3 /hr | 1.5-18 m | 650/650 mm | 2200-2500 kw |
| CSD-700 | 7000 m3 /hr | 1.5-20 m | 750/700 mm | 2800-3500 kw |
Key Characteristics: Excavation depth range ~10-15m, total installed power 400-600 kW, capable of handling medium-hard soils (stiff clay, weathered rock, dense sand), often equipped with a standard cutter head, and transported in sections for assembly on site. Ideal for port maintenance, medium-scale reclamation, and river projects.
Cutter Suction Dredger Design:Cutter suction dredger CSD design focuses on efficient excavation, material transport, stability, and maneuverability:
Hull/Pontoon: Provides buoyancy and stability, often flat-bottomed.
Ladder: A strong, inclined structure lowered from the bow, supporting the cutter head, suction mouth, and often underwater pumps.
Cutter Head: Rotating assembly with cutting tools (teeth, blades, picks) tailored to the soil type. Driven by a powerful cutter drive (electric or hydraulic).
Suction Pipe & Mouth: Positioned immediately behind the cutter head to intake the loosened slurry.
Dredge Pumps: Centrifugal pumps (1 or more onboard and/or 1 underwater pump near the suction mouth and ) create vacuum for suction and pressure for pipeline transport.
Discharge Pipeline: Floating or submerged pipes carrying slurry to the disposal site.
Spud System: A central spud pole (working spud) lowered at the stern acts as a pivot point.
Swing winches connected to side anchors or auxiliary spuds ("spud carriages") pull the vessel in an arc around the working spud.
Bridge & Control Room: Houses navigation, dredging process control, and monitoring systems.
Power Plant: Diesel engines or generators providing power for all systems (cutter, pumps, winches, thrusters, hotel load).
Key features defining CSDs:
Ability to Cut Hard Materials: Unique capability to fragment rock, stiff clay, and consolidated soils via the rotating cutter head.
Precision Excavation: Can dredge specific slopes and profiles accurately using advanced positioning and depth control.
Continuous Operation: Excavates, sucks, and pumps material in a continuous process.
Long-Distance Transport: Capable of pumping slurry over very long distances (kilometers) via pipelines.
Stationary Dredging Method: Anchors via spud and swings in arcs, allowing thorough coverage of an area.
Versatility: Adaptable to a wide range of soil types and project types through cutter head and tool changes.
Self-Contained: Carries its own excavation, pumping, and positioning equipment.
China is a global leader in the cutter suction dredger CSD market:
Major Manufacturers: CCCC (China Communications Construction Company) subsidiaries dominate, notably Shanghai Zhenhua Heavy Industries (ZPMC) and CCCC Tianjin Dredging Co., Ltd.. Others include CSSC, HDEC.
Scale & Innovation: Build the world's largest and most powerful CSDs (e.g., Tian Kun Hao - 6600kW cutter, 35m depth). Invest heavily in R&D for automation, efficiency, and cutter technology.
Domestic Demand: Massive domestic infrastructure projects (Belt & Road, port expansion, island building in SCS) drive demand and provide real-world testing grounds.
Global Exporter: Chinese-built CSDs are exported worldwide, competing strongly on price and technology. Supply vessels for major international dredging contractors and foreign governments.
Technological Prowess: Develop advanced features like intelligent dredging control systems, heavy-duty rock cutting heads, and eco-friendly designs.
State-Backed: Significant government support fuels the industry's growth and global competitiveness.
Cutter Head: Hardened steel blades with adjustable rotation (0–30 RPM) for tough sediments.
Pump System: 500 kW centrifugal pump with 1200-1500 m³/hour slurry capacity.
Positioning: Dual spud poles and winches for precise positioning (±0.5m accuracy).
Power: Marine diesel (CAT/Cummins/Weichai/Mitsubishi /DEUTZ) engine with low fuel consumption.
Control: Automated ICS (Integrated Control System) with real-time monitoring.
Safety: Anti-collision sensors, emergency shutdown, and corrosion-resistant coatings.
Efficiency: Excavates1200-1500m³/hour, reducing dredging time by 40% comparing with excavator.
Versatility: Adapts to varying sediments via replaceable cutter teeth.
Mobility: Modular pontoons for quick disassembly and transport,
Eco-Friendly: Minimizes turbidity with enclosed slurry systems.
Low OPEX: Automated controls cut labor costs; durable components reduce maintenance.
Heavy-duty, high concentration ratio, excellent particle allowance, and long discharge distance
Hydraulic System: Optimal configuration of power and hydraulic unit (less operating costs)
Double powerful auger drive (infinitely for- and backward)
High working range of the outrigger dredging ladder
Efficient design in Cutter suction head can be changed for different situation
Easy access to all parts, especially the dredge pump wearing parts
Freshwater cooling system
Safe and easy to operate
Customized design: Can be designed and fabricated according to your requirements
The cutter suction dredger CSD300 can be applied in diverse environments field:
Ports & Harbors: Maintains navigation channels by removing situation and deepening berths.
River Management: Restores water flow through desilting, prevents flooding, and rehabilitates ecosystems.
Land Reclamation: Extracts seabed materials for coastal infill projects, creating stable foundations for construction.
Mining & Aggregates: Harvests sand, gravel, and precious minerals from riverbeds or offshore deposits.
Environmental Remediation: Cleans contaminated sediments (e.g., industrial sludge) via precision dredging.
Infrastructure Projects: Prepares trenches for pipelines/cables and constructs irrigation canals.
Its compact size allows access to confined areas like marinas or reservoirs, while robust performance suits large-scale coastal engineering. Real-time monitoring ensures minimal ecological disruption, making it ideal for sensitive zones.
