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A Cutter Suction Dredger (CSD) is a stationary dredging vessel that excavates soil, sand, clay, or rock underwater using a rotating cutter head, suction the dredging material through suction pipe, transferring the dredging product through pipeline by pressured sand dredge pump powered by diesel engine or electric motor. It combines three key functions:
Cutting: A rotating cutter head (equipped with blades/teeth) loosens hard material.
Suction: A powerful centrifugal pump sucks the loosened material (slurry) through a pipe.
Disposal: The slurry is transported via pipelines to barges, reclamation sites, or designated disposal areas.
Stationary Operation: Anchored by spud poles (large steel stakes) and moved via winches.
Versatility: Handles everything from soft silt to hard rock (with specialized cutter teeth).
Precision: Ideal for channel deepening, trenching, and confined areas.
Minimal Environmental Impact: Enclosed pipeline transport reduces sediment spill vs. grab dredgers.
Cutter suction dredgers (CSDs) are indispensable in marine, environmental, and infrastructure projects due to their precision, efficiency, and versatility. Below are key applications in detail:
Challenge: Sedimentation from rivers/tides reduces navigational depth, blocking cargo ships.
Cutter Suction Dredger CSD Solution:
Excavates silt, sand, and clay from shipping channels and berths.
Maintains depths of 10–25 meters using GPS-guided positioning.
Example: Annual maintenance of Rotterdam Port (dredging 20M m³/year).
Challenge: Coastal cities need new land for airports, industry, or urban expansion.
Cutter Suction Dredger CSD Solution
Pumps seabed sand/slurry via pipelines to create stable foundations.
Handles 500–5,000 m³/hour for projects like Dubai’s Palm Islands or Singapore’s Tuas Port.
Filters sediment for optimal compaction and erosion resistance.
Challenge: Siltation causes flooding, disrupts irrigation, and harms ecosystems.
Cutter Suction Dredger CSD Solution:
Desilts rivers (e.g., Nile, Mississippi) to restore flow capacity and prevent floods.
Rehabilitates wetlands by removing invasive sediments.
Builds irrigation canals with precise slopes for agriculture.
Challenge: Subsea infrastructure (oil/gas pipes, fiber optics) requires buried trenches for stability.
Cutter Suction Dredger CSD Solution
Cuts narrow, deep trenches (1–4m wide, up to 30m deep).
Simultaneously back fills trenches post-pipeline placement.
Minimizes seabed disruption vs. open-cut methods.
Challenge: Demand for sand, gravel, and minerals from riverbeds/seabeds.
Cutter Suction Dredger CSD Solution:
Harvests aggregates using cutter heads with tungsten teeth for hard materials.
Screens/extracts valuable minerals (e.g., tin, gold) from alluvial deposits.
Enables eco-sensitive mining in protected zones with low-turbidity operations.
Challenge: Toxic sludge (industrial/heavy metal waste) contaminates waterways.
Cutter Suction Dredger CSD Solution:
Precisely removes polluted sediments with enclosed pipelines.
Delivers slurry to treatment facilities for decontamination.
Restores habitats (e.g., Chesapeake Bay PCB cleanup).
Challenge: Erosion threatens shorelines, tourism, and property.
Cutter Suction Dredger CSD Solution:
Pumps offshore sand to replenish beaches (e.g., Miami Beach, USA).
Constructs breakwaters and artificial reefs using placed sediment.
Challenge: Silt reduces water storage capacity in dams/ponds.
Cutter Suction Dredger CSD Solution:
Operates in confined spaces to deepen reservoirs.
Removes organic muck to improve water quality for agriculture.
Precision: Spud poles/GPS allow centimeter-accurate dredging in sensitive zones.
Material Flexibility: Interchangeable cutter heads handle silt, clay, gravel, coral, and soft rock.
Eco-Efficiency: Enclosed pipelines reduce turbidity and marine life disruption.
Cost-Effectiveness: High production rates (>1,000 m³/hour) lower project timelines by 30–50%.
The "250" in CSD250 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.
CSD250 = Cutter suction dredger with a ~250 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 | 1.5-20m | 750/700 mm | 2800-3500 kw |
Key Design Elements of a CSD250:
Cutter Head: Robust, replaceable tungsten carbide teeth for rock/gravel.
Spud Carriage System: Allows precise forward movement during operation.
Power Plant: Diesel engine (~400 HP total) driving hydraulic/pump systems.
Automation: GPS positioning for accurate dredge path control.
Cutter Head: Hardened steel blades with adjustable rotation (0–30 RPM) for tough sediments.
Pump System: 330 kW centrifugal pump with 900-1000 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.
Quick Selection Chart
| 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 | 1.5-20m | 750/700 mm | 2800-3500 kw |
Efficiency: Excavates800-900m³/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 CSD250 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 stationary dredging vessel that excavates soil, sand, clay, or rock underwater using a rotating cutter head, suction the dredging material through suction pipe, transferring the dredging product through pipeline by pressured sand dredge pump powered by diesel engine or electric motor. It combines three key functions:
Cutting: A rotating cutter head (equipped with blades/teeth) loosens hard material.
Suction: A powerful centrifugal pump sucks the loosened material (slurry) through a pipe.
Disposal: The slurry is transported via pipelines to barges, reclamation sites, or designated disposal areas.
Stationary Operation: Anchored by spud poles (large steel stakes) and moved via winches.
Versatility: Handles everything from soft silt to hard rock (with specialized cutter teeth).
Precision: Ideal for channel deepening, trenching, and confined areas.
Minimal Environmental Impact: Enclosed pipeline transport reduces sediment spill vs. grab dredgers.
Cutter suction dredgers (CSDs) are indispensable in marine, environmental, and infrastructure projects due to their precision, efficiency, and versatility. Below are key applications in detail:
Challenge: Sedimentation from rivers/tides reduces navigational depth, blocking cargo ships.
Cutter Suction Dredger CSD Solution:
Excavates silt, sand, and clay from shipping channels and berths.
Maintains depths of 10–25 meters using GPS-guided positioning.
Example: Annual maintenance of Rotterdam Port (dredging 20M m³/year).
Challenge: Coastal cities need new land for airports, industry, or urban expansion.
Cutter Suction Dredger CSD Solution
Pumps seabed sand/slurry via pipelines to create stable foundations.
Handles 500–5,000 m³/hour for projects like Dubai’s Palm Islands or Singapore’s Tuas Port.
Filters sediment for optimal compaction and erosion resistance.
Challenge: Siltation causes flooding, disrupts irrigation, and harms ecosystems.
Cutter Suction Dredger CSD Solution:
Desilts rivers (e.g., Nile, Mississippi) to restore flow capacity and prevent floods.
Rehabilitates wetlands by removing invasive sediments.
Builds irrigation canals with precise slopes for agriculture.
Challenge: Subsea infrastructure (oil/gas pipes, fiber optics) requires buried trenches for stability.
Cutter Suction Dredger CSD Solution
Cuts narrow, deep trenches (1–4m wide, up to 30m deep).
Simultaneously back fills trenches post-pipeline placement.
Minimizes seabed disruption vs. open-cut methods.
Challenge: Demand for sand, gravel, and minerals from riverbeds/seabeds.
Cutter Suction Dredger CSD Solution:
Harvests aggregates using cutter heads with tungsten teeth for hard materials.
Screens/extracts valuable minerals (e.g., tin, gold) from alluvial deposits.
Enables eco-sensitive mining in protected zones with low-turbidity operations.
Challenge: Toxic sludge (industrial/heavy metal waste) contaminates waterways.
Cutter Suction Dredger CSD Solution:
Precisely removes polluted sediments with enclosed pipelines.
Delivers slurry to treatment facilities for decontamination.
Restores habitats (e.g., Chesapeake Bay PCB cleanup).
Challenge: Erosion threatens shorelines, tourism, and property.
Cutter Suction Dredger CSD Solution:
Pumps offshore sand to replenish beaches (e.g., Miami Beach, USA).
Constructs breakwaters and artificial reefs using placed sediment.
Challenge: Silt reduces water storage capacity in dams/ponds.
Cutter Suction Dredger CSD Solution:
Operates in confined spaces to deepen reservoirs.
Removes organic muck to improve water quality for agriculture.
Precision: Spud poles/GPS allow centimeter-accurate dredging in sensitive zones.
Material Flexibility: Interchangeable cutter heads handle silt, clay, gravel, coral, and soft rock.
Eco-Efficiency: Enclosed pipelines reduce turbidity and marine life disruption.
Cost-Effectiveness: High production rates (>1,000 m³/hour) lower project timelines by 30–50%.
The "250" in CSD250 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.
CSD250 = Cutter suction dredger with a ~250 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 | 1.5-20m | 750/700 mm | 2800-3500 kw |
Key Design Elements of a CSD250:
Cutter Head: Robust, replaceable tungsten carbide teeth for rock/gravel.
Spud Carriage System: Allows precise forward movement during operation.
Power Plant: Diesel engine (~400 HP total) driving hydraulic/pump systems.
Automation: GPS positioning for accurate dredge path control.
Cutter Head: Hardened steel blades with adjustable rotation (0–30 RPM) for tough sediments.
Pump System: 330 kW centrifugal pump with 900-1000 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.
Quick Selection Chart
| 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 | 1.5-20m | 750/700 mm | 2800-3500 kw |
Efficiency: Excavates800-900m³/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 CSD250 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.
