20-Inch Cutter Suction Dredger Qingzhou Yakai Dredging Machinery Manufacturing Co., Ltd. is a professional manufacturing factory focusing on the R&D and production of cost-effective medium and large-sized dredgers and dredging boats. https://ykdredging.com/
Our classic hot-selling20-Inch Cutter Suction Dredger is a heavy-duty multifunctional large-scale dredging equipment independently developed by our factory, with standardized overall dimensions of 45m × 8.2m × 2.2m and a total weight of 135 tons. This ultra-high-output cutter suction dredger serves as the optimal solution for super-large-scale high-volume dredging and large commercial sand mining projects
It is equipped with a 1342kW (1800HP) Weichai marine dedicated diesel engine and a 20-inch high-chromium alloy anti-clogging slurry pump (500-type dredging pump), delivering a rated comprehensive slurry flow of 4200m³/h and stable solid sand output of 1050m³/h.https://vt.tiktok.com/ZSHb8HWXu/
Capable of effective dredging depth ranging from 5m to 22m, the dredger supports 2000m single-stage straight conveying and up to 2800m conveying distance with an auxiliary booster pump. The20-inch cutter suction dredger is mainly deployed for large-scale river channel deepening & desilting, ultra-large aquaculture fish and shrimp breeding pond cleaning, large rural reservoir sediment removal, high-volume commercial river sand mining, coastal land reclamation and scenic water ecological large-scale renovation. Compared with ultra-heavy customized large dredgers with exorbitant procurement costs and complex operation,
the 20-inch cutter suction dredger features reasonable investment cost, flexible maneuverability and low daily comprehensive operating cost; while conventional 6-inch, 8-inch, 10-inch, 12-inch, 14-inch and 18-inch medium and medium-large dredgers cannot meet ultra-high daily construction output demands for super-large projects. This split-type dredging boat perfectly fills the market gap of large-budget ultra-high-efficiency dredging projects and has become the preferred core equipment for professional large contractors, super-scale aquaculture groups and regional water conservancy departments worldwide.
Core Structure & Working Principle
The 20-Inch Cutter Suction Dredger adopts an upgraded heavy-duty modular welded structure with an all-steel reinforced split hull, using 18mm thick bottom steel and 16mm thick side steel plates processed with five-layer heavy-duty anti-rust and anti-corrosion coating to adapt to inland freshwater, brackish water and mild offshore working environments.
The complete equipment consists of a dedicated 20-inch anti-blockage high-flow slurry pump system, customized 2400mm diameter closed crown-type cutter head matched with 8 reinforced thickened wear-resistant alloy blades, optimized heavy-duty double winch synchronous positioning system, high-torque anti-winding hydraulic stirring device, ultra-thick wear-resistant high-pressure conveying pipeline and upgraded intelligent integrated control cabinet. Different from fixed three-pile heavy dredgers, this 20-inch dredger adopts flexible winch traction positioning mode, featuring stable structure and convenient cross-region disassembly and transfer.
The matched 2400mm high-torque cutter head efficiently breaks loose thick river sludge, dense coarse river sand and severely hardened riverbed sediment; the supporting 20-inch high-flow slurry pump continuously sucks high-concentration sand-slurry mixtures and realizes long-distance high-pressure discharging. All core components are manufactured in strict accordance with international large dredger manufacturing standards, supporting 22-hour daily continuous high-intensity operation with ultra-low failure rate and convenient daily maintenance.
1. Dredging Pump & Positioning Mechanism
Equipped with an exclusive 20-inch high-chromium alloy anti-clogging slurry pump (500-type) and upgraded heavy-duty double winch synchronous traction positioning system, this 20-Inch Cutter Suction Dredger is specially customized for deep shallow water areas and medium-hardness & high-hardness sediment working conditions by Qingzhou Yakai Dredging Machinery Manufacturing Co., Ltd..
The supporting hydraulic stirring system adopts an2400mm integral alloy cutter head with independent 280kW dedicated cutter power, which is suitable for crushing loose sludge, fine sand, thick viscous sediment, coarse river sand and severely hardened riverbed compacted sediment. The front and rear double winch synchronous positioning structure realizes wide-range left and right horizontal swinging operation, covering an oversized working area without frequent hull displacement. Compared with mainstream 18-inch medium-large dredgers on the market with a maximum solid output of 850m³/h, our model raises solid sand handling capacity to1050m³/h, greatly improving overall construction efficiency and shortening project delivery cycle. The integrated anti-winding stirring and high-flow suction structure effectively resists winding of dense aquatic weeds and water plants, making it the best-selling heavy-duty large-scale cutter suction dredger in our full product series.
2. Conveying Pipeline System
The supporting conveying pipeline of the 20-Inch Cutter Suction Dredger is forged from high-strength ultra-thick wear-resistant manganese steel alloy materials, exclusively customized for heavy-duty large lightweight dredging boats. The pipe wall is thickened by 120% compared with ordinary thin-walled pipelines, capable of resisting long-distance impact from medium and large gravel and long-term corrosion caused by high-viscosity thick pond sludge and saltwater. It is applicable to long-distance transportation of high-concentration sludge, coarse river sand, gravel sediment and mixed hard sediment. The high-strength quick-disassembly flange connection structure simplifies installation, disassembly and daily maintenance work; the optimized load-balanced pressure-resistant pipeline design also controls the overall hull load reasonably, perfectly matching the rated high-flow working parameters of the 20-inch slurry pump and improving overall construction flexibility of the 20-inch cutter suction dredger.
3. Fuselage & Frame Design
The entire fuselage of the 20-Inch Cutter Suction Dredger adopts upgraded heavy-duty reinforced split combined hull design, which can be disassembled into multiple independent modules for land truck transportation, solving the cross-region transfer difficulty of integrated oversized dredgers. The high-quality marine high-strength steel welded frame is optimized for high-load-bearing stable design, which effectively enhances structural stability during long-term 22-hour high-intensity daily operation while controlling dead weight within a reasonable range. The spacious and classified deck layout independently divides exclusive sealed operating areas for power unit, high-flow pumping system and winch positioning equipment, facilitating operators to inspect equipment status and replace vulnerable parts rapidly and safely. This 20-inch cutter suction dredger is specially designed for super-large shallow water deep-dredging scenarios that 6/8/10/12/14/18-inch medium dredgers cannot cover and ultra-heavy customized large dredgers are uneconomical to deploy.
4. Power & Control System
Customers can freely select marine diesel power or industrial electric power mode for the20-Inch Cutter Suction Dredger according to local project conditions, fuel cost and power supply status. The upgraded full-featured intelligent control cabinet adopts humanized visualized interactive operation design, supporting real-time data monitoring of dredging slurry flow, pump pressure, engine load rate, cutter operating torque, equipment operating temperature and pipeline concentration. The operation threshold is low, and novice operators can master all core operating skills within 1.5 hours of simple professional training. Our factory equips every finished 20-inch cutter suction dredger with complete supporting accessories, spare vulnerable parts and detailed multilingual operation & maintenance tutorials, helping global customers quickly put the equipment into formal high-output construction.
5. Optional Auxiliary System
To meet diversified ultra-high-intensity long-term construction demands of super-large national-level dredging projects, our factory provides cost-effective optional premium auxiliary configurations for the 20-Inch Cutter Suction Dredger: all-weather explosion-proof waterproof high-brightness lighting system, cloud remote real-time data monitoring & fault early warning module, extended ultra-thick wear-resistant floating pipeline assembly, high-buoyancy reinforced pipeline buoy and matched high-power auxiliary booster pump, helping customers realize stable ultra-long-distance efficient construction in complex shallow water and mild offshore environments.
Detailed Technical Specification Table
| Parameter Category | Specification Details | Unit | Standard Parameters (20-Inch Cutter Suction Dredger) |
| Basic Information | Equipment Type | — | 20-Inch Cutter Suction Dredger (Heavy-Duty Reinforced Split Dredging Boat) |
| Main Purpose | — | Large River Deepening & Desilting, Ultra-Large Aquaculture Pond Cleaning, Large Reservoir Sediment Removal, Scenic Lake Ecological Renovation, Large-Scale Commercial River Sand Mining & Coastal Land Reclamation | |
| Fuselage Material | — | 18mm Bottom/16mm Side Marine High-Strength Steel, Integral Welding & Five-Layer Heavy-Duty Anti-Rust Coating | |
| Overall Hull Dimension | m | 45(L) × 8.2(W) × 2.2(H) | |
| Total Equipment Weight | t | 135 | |
| Working Performance (20-Inch Specific) | Dredging Pump Diameter | Inch | 20 (500-Type High-Chromium Alloy Anti-Blockage High-Flow Slurry Pump) |
| Rated Slurry Flow | m³/h | 4200 (Max 4600) | |
| Solid Sand Output | m³/h | 1050 (Stable Working Condition) | |
| Effective Dredging Depth | m | 5.0–22 | |
| Cutter Head Specification | mm | 2400, 8pcs Reinforced Thickened Wear-resistant Alloy Blades | |
| Cutter Head Rated Power | kW | 280 | |
| Positioning Mode | — | Heavy-Duty Double Winch Synchronous Traction Positioning | |
| Max Conveying Distance | m | 2000 (Single-Stage), 2800 (Dual-Stage Booster) | |
| Power Parameter | Main Engine Rated Power | kW / HP | 1342kW / 1800HP (Weichai Marine Special Diesel) |
| Optional Power Type | — | Diesel / Industrial Electric Power | |
| Standard Draft | m | 2.0 (Range:1.7–2.8) | |
| Environment Adaptability | Applicable Area | — | Inland Large Rivers, Ultra-Large Breeding Ponds, Large Rural Reservoirs, Scenic Lakes, Shallow Coastal Water & Large-Scale Land Reclamation Projects |
| Corrosion & Wear Resistance | — | Five-Layer Heavy-Duty Marine Anti-Rust Coating, High-Chromium Alloy Pump & Ultra-Thick Wear-Resistant High-Pressure Pipeline | |
| Max Continuous Working Time | h | 22 | |
| Certification & Warranty | Implementation Standard | — | ISO9001, International Large Dredger Safety & Manufacturing Specification |
| Warranty Period | Month | 12 Months for Whole Machine, 18 Months for Main Engine & Cutter Head & Slurry Pump |
Core Technical Advantages of 20-Inch Cutter Suction Dredger
1. Factory Direct Supply, Ultra-High Cost Performance
Qingzhou Yakai Dredging Machinery Manufacturing Co., Ltd. is a professional one-stop manufacturing factory focused on the R&D and production of heavy-duty large lightweightdredgers and dredging boats. We eliminate intermediate agents and multi-level price markups, delivering cost-effective20-Inch Cutter Suction Dredger directly to large engineering contractors, super-large aquaculture groups and large-scale water conservancy engineering teams. Compared with expensive customized ultra-heavy large dredging equipment, our 20-inch cutter suction dredger features lower procurement cost and unit fuel consumption; compared with conventional 6/8/10/12/14/18-inch medium dredgers, it boasts 50%~90% higher working efficiency and daily solid output, helping clients acquire higher economic returns in super-large high-volume dredging and commercial sand mining projects.
2. Heavy-Duty Split Hull Design, Easy Cross-Region Transfer & Fast Installation
Different from integrated oversized dredgers that are difficult to transport and deploy across regions, the 20-Inch Cutter Suction Dredger adopts upgraded heavy-duty modular split hull structure, which can be disassembled into multiple independent modules for land truck transportation, completely solving cross-region transfer pain points for large heavy-duty dredging equipment. The optimized high-precision synchronous double winch positioning system supports large-angle horizontal swinging operation, adapting to narrow mainstream river channels and ultra-large enclosed pond environments. The whole equipment can be assembled and officially put into formal construction within 12 hours without large-scale professional hoisting equipment, which is the core competitive advantage of our flagship heavy-duty 20-inch cutter suction dredger.
3. High-Power 20-Inch High-Flow Slurry Pump, Max Super-Large Output
The customized anti-clogging ultra-thick wear-resistant 20-inch high-chromium alloy high-flow slurry pump (500-type) configured for the20-Inch Cutter Suction Dredger, matched with a 2400mm heavy-duty reinforced crushing cutter head and 280kW independent high-power cutter drive system, features powerful suction performance for deep shallow water dense sediment and highly hardened compacted riverbed sand. It achieves a rated slurry flow of 4200m³/h and a stable solid sand output of 1050m³/h, with standard 2000m single-stage horizontal conveying distance and optional 2800m ultra-long-distance transportation via matched auxiliary booster pump. This pump can easily handle high-viscosity thick sludge, coarse river sand, aquatic mixed sediment and medium-large gravel within the 5-22m dredging depth range, adapting to all kinds of inland deep shallow water and mild offshore working environments. It is the most cost-effective dedicated equipment for large-budget ultra-high-output dredging and large-scale commercial sand mining projects.
4. Reinforced Wear-Resistant & Multi-Layer Anti-Rust Structure, Low Long-Term Maintenance Cost
Core vulnerable components of the 20-Inch Cutter Suction Dredger, including pump impeller, pump shell and high-pressure discharge pipeline, are integrally forged from high-hardness high-chromium wear-resistant alloy. The heavy-duty split hull is treated with five-layer marine-grade heavy-duty anti-rust coating to resist long-term freshwater corrosion, salt water erosion and high-strength sediment abrasion. Compared with ordinary 18-inch medium-large dredgers, the overall durability and service life of this20-inch cutter suction dredger is increased by 80%, effectively reducing daily maintenance frequency and lowering long-term comprehensive operating costs for end users.
5. Humanized Intelligent Operation & Dual Power Flexible Support
The upgraded full-featured intelligent control panel optimizes the human-computer visualized interaction interface and minimizes operating difficulty, enabling novice operators to proficiently operate the 20-Inch Cutter Suction Dredger after short-term standardized simple training without professional grade operation certificates. This heavy-duty dredger supports diesel and electric dual power free switching; users can select the most economical power mode according to on-site power supply conditions and project operation duration to save fuel/electricity cost and maximize construction economy. Our factory provides free professional on-site operation training and complete multilingual after-sales maintenance tutorials for every purchased 20-inch cutter suction dredger.
6. Fully Customizable Configuration for Complex Extreme Scenarios
With decades of rich experience in heavy-duty large dredger manufacturing, Qingzhou Yakai Dredging Machinery Manufacturing Co., Ltd. provides personalized one-stop customized overall solutions for the 20-Inch Cutter Suction Dredger. Clients can adjust core parameters such as overall floating pipeline total length, maximum customized dredging depth, cutter head type & specification, winch power and floating pipeline quantity according to actual water area size, sediment hardness and special project demands, to make the 20-inch cutter suction dredger perfectly adapt to various complex deep shallow water construction scenarios and large-scale coastal reclamation projects.
Typical Application Scenarios
1. Large River Channel Deepening & Commercial High-Volume Sand Mining
The 20-Inch Cutter Suction Dredger is professionally developed for large inland river ecological renovation, channel deepening and ultra-high-volume commercial sand mining projects. It efficiently clears thick accumulated viscous sludge and highly hardened compacted riverbed sediment, optimizes water flow velocity and navigable depth, and effectively prevents river channel silting and seasonal flood safety risks. Featuring flexible modular transfer, ultra-high daily output and reasonable comprehensive operating cost, this20-inch cutter suction dredger has become the mainstream designated equipment for national large-scale river regulation and high-output sand mining projects across the globe.
2. Ultra-Large Aquaculture Fish & Shrimp Pond Deep Cleaning
Featuring low-disturbance layered precise dredging and high-efficiency dirt removal characteristics, the 20-Inch Cutter Suction Dredger quickly cleans thick bottom organic sludge and residual feed waste in ultra-large aquaculture ponds without damaging the original pond bottom basic structure. It effectively reduces harmful anaerobic bacteria and ammonia nitrogen content in sludge, improves underwater dissolved oxygen content and further enhances aquatic product survival rate and breeding yield. This high-cost-performance heavy-dutydredging boat is widely recognized and purchased by global large and super-large integrated aquaculture groups.
3. Large Rural Reservoir Sediment Removal & Capacity Restoration
Specially designed for large rural reservoirs and large-scale rainwater storage ponds, the20-Inch Cutter Suction Dredger thoroughly cleans thick aged accumulated sediment inside the reservoir, restores the original designed water storage capacity to the maximum extent, and guarantees regional large-scale agricultural irrigation, centralized aquaculture water and daily domestic water supply for residents. It is the most suitable cost-effective equipment for grassroots large-scale water conservancy sediment cleaning, reservoir reinforcement and water storage capacity upgrading projects.
4. Shallow Water Port & Dock Navigational Channel Maintenance
The 20-Inch Cutter Suction Dredger is applicable to daily deepening desilting and navigational channel maintenance for large inland docks and shallow water coastal berths. It regularly clears underwater accumulated sediment to maintain stable standard navigable depth for fishing boats, passenger ships and medium-sized cargo vessels, serving as essential supporting core equipment for daily long-term stable operation of inland large shallow water ports and coastal small and medium-sized docks.
5. Large-Scale Scenic Water Area Ecological Restoration & Coastal Reclamation
Equipped with low-noise optimized operation mode and zero secondary pollution discharge environmental protection design, the 20-Inch Cutter Suction Dredger is suitable for urban large scenic lakes, artificial landscape water areas, wetland ecological parks and large-scale coastal land reclamation projects. It removes redundant bottom sludge and harmful sediment, improves water transparency and water quality clarity, and realizes efficient ecological water body restoration, fully complying with international environmental protection emission standards of all countries.
Product Competitive Advantages
- Factory Direct Sales: Direct sales model of professional heavy-duty dredger manufacturer, cut all intermediate markup links and reduce overall project investment threshold.
- Heavy-Duty Split Modular Design: Detachable thickened reinforced hull for convenient truck cross-region transportation, no restrictions on cross-water-area large-scale continuous construction.
- Ultra-High Cost-Performance: Equipped with exclusive 20-inch high-power 500-type high-flow slurry pump, super-large daily solid output and low comprehensive fuel & maintenance operating cost.
- Wide Scenario Adaptability: Five-layer heavy-duty anti-rust & wear-resistant treatment, adaptable to freshwater, brackish water and mild saltwater deep shallow water working environments.
- Intelligent & Safe Operation: Upgraded visualized intelligent control system with real-time fault early warning, low operation threshold for untrained novice operators.
- Full-Scenario Compatibility: A single 20-inch cutter suction dredger covers all deep shallow water dredging demands for large rivers, ultra-large ponds, large reservoirs, scenic water areas and coastal reclamation projects.
Quality Assurance & After-Sales Service
Qingzhou Yakai Dredging Machinery Manufacturing Co., Ltd. holds complete qualification certificates for medium and large heavy-duty dredger design and standardized production. Every finished20-Inch Cutter Suction Dredger will undergo a 22-hour full-load cyclic aging operation test before delivery to eliminate potential structural and functional defects:
- Test the linkage coordination performance of upgraded heavy-duty synchronous winch positioning system and 20-inch high-flow dredging pump to ensure stable operation under long-term 22-hour high-intensity daily working status.
- Provide complete product qualification certificates, third-party quality inspection reports and detailed multilingual official operation & maintenance manuals for the 20-inch cutter suction dredger.
- 12 months full-machine warranty service, covering all core wearing parts and operating components of the heavy-duty dredging equipment.
- Provide global 24/7 online remote technical guidance and on-site installation, equipment debugging & operator customized training services for overseas customers.
- Complete full-series spare parts inventory, realize 3-day fast global door-to-door delivery of vulnerable parts for all sold 20-inch cutter suction dredger products.
Conclusion
The classic flagship hot-selling 20-Inch Cutter Suction Dredger launched by Qingzhou Yakai Dredging Machinery Manufacturing Co., Ltd. is a high-cost-performance heavy-duty large deep shallow water dredging equipment. Thisdredging boat integrates flexible modular cross-region transfer, humanized intelligent operation, low long-term maintenance cost and ultra-high daily construction output efficiency, perfectly solving various construction pain points in ultra-large pond deep desilting, large river channel deepening, high-volume commercial sand mining and coastal land reclamation projects. Adhering to the quality-first and customer-oriented manufacturing philosophy, our factory provides high-quality 20-inch cutter suction dredger products and personalized targeted dredging solutions for global large-scale project users, which is the optimal cost-effective choice for all kinds of super-large shallow water high-output dredging projects.
Operating Instructions
To maximize the overall service life and daily working efficiency of the 20-Inch Cutter Suction Dredger, all operators must strictly abide by standardized operating specifications. This complete guideline covers pre-operation inspection, formal dredging steps and shutdown procedures specially formulated for the20-inch cutter suction dredger.
1. Pre-Operation Inspection
- Inspect the heavy-duty reinforced hull welding seams and five-layer anti-rust coating of the 20-Inch Cutter Suction Dredger to confirm no water leakage, welding cracking or structural damage.
- Debug the upgraded heavy-duty synchronous double winch positioning system repeatedly to test lifting and horizontal traction functions, eliminate jamming and abnormal noise faults in advance before formal operation.
- Check the 20-inch high-flow dredging pump, integral impeller assembly and ultra-thick wear-resistant high-pressure pipeline of the 20-inch cutter suction dredger, fasten loose connecting flanges and clean internal residual sediment blockages.
- Examine the overall high-power power system, detect diesel fuel reserves and circuit tightness to avoid sudden flameout and power failure during long-term high-intensity continuous operation.
- Debug the intelligent visualized control panel to verify slurry flow rate, pump pressure, cutter torque status and engine load data can be displayed accurately and updated in real time.
2. Formal Operation Steps
- Navigate the 20-Inch Cutter Suction Dredger to the predetermined deep shallow water working area, adjust the hull to a horizontal balanced state, and fix the overall position via front and rear synchronous positioning winches.
- Start the power unit at idle speed, preheat the 20-inch high-flow dredging pump for 8-10 minutes, then gradually increase power to the rated working range to prevent equipment shock damage caused by instantaneous load surge.
- Adjust the cutter head stirring depth and suction angle according to sediment thickness and hardness to start formal desilting and sand mining work; overload startup and long-term overpressure high-load operation of the 20-inch cutter suction dredger are strictly prohibited to protect the slurry pump and main engine.
- Monitor pump pressure, slurry concentration, cutter operating torque and material flow data in real time during operation; reduce engine power immediately and troubleshoot once pipeline blockage or abnormal vibration occurs.
- After completing the single-point dredging task, adjust the synchronous winch to move the hull horizontally to the next working area and repeat the standardized operation steps.
3. Shutdown Procedures
- Before shutting down the 20-Inch Cutter Suction Dredger, stop sediment suction firstly, keep the 20-inch dredging pump running with clean water for 8-10 minutes to flush residual high-viscosity thick sludge inside the pump cavity and conveying pipeline.
- Gradually reduce engine power to stable idle speed, turn off the overall power system, and retract the heavy-duty cutter head to the preset safe height above the water surface.
- Clean the hull surface and core vulnerable parts of the 20-inch cutter suction dredger, record daily operating data and equipment running status for later targeted maintenance reference.
4. Basic Operational Skills & Practical Guidance
To help operators quickly master the professional operating skills of the 20-Inch Cutter Suction Dredger, our factory summarizes targeted practical operating skills for super-large deep shallow water construction:
- Sediment Suction Adjustment: For low-concentration fine sediment areas, appropriately increase pump power to enhance overall suction force. For thick viscous sludge and highly hardened sediment, control the cutter head to swing horizontally at low speed to avoid pump suction interruption and equipment overload burnout.
- Narrow Water Area Operation: When working in narrow river channels and small enclosed ponds, reduce the swinging range of the synchronous winch to prevent the hull from colliding with river banks and causing structural deformation and paint damage.
- Water Depth Adaptation: For ultra-shallow water areas below 2.0m, lift the cutter head appropriately to avoid direct rigid friction with the riverbed and reduce wear of alloy cutter blades.
- Dual Power Switching Tips: Switch power modes only when the dredger is in stable idle state, and run the equipment at idle speed for 2-3 minutes after switching to stabilize internal pump pressure and protect the high-power main power system.
5. Pipeline Blockage Emergency Solution
Pipeline blockage is the most common minor fault during daily high-intensity operation of the 20-Inch Cutter Suction Dredger. Operators can solve faults quickly through the following standardized methods:
- Once blockage occurs, stop sediment suction immediately and adjust the engine to stable idle speed, keep the 20-inch dredging pump running with clean water to dilute and discharge blocked sediment inside the pipeline.
- If clean water flushing fails, start the intelligent reverse pump function for 5-30 seconds repeatedly to discharge accumulated gravel and viscous sludge from the suction port.
- For severe hard blockage caused by large gravel, cut off the overall power completely, disassemble the quick-disassembly high-strength flange, manually clean internal blockages, and conduct 10-minute idle trial operation before restarting formal construction.
Important Notes & Safety Precautions
Standardized safety precautions are essential to extend overall service life and avoid safety accidents of the 20-Inch Cutter Suction Dredger. Our factory sorts out targeted risk control rules for daily operation and regular maintenance:
1. Operational Safety Notes
- Operators must receive systematic basic equipment training before operating the 20-inch cutter suction dredger to prevent unnecessary equipment damage and personal safety accidents.
- It is strictly forbidden to operate the 20-Inch Cutter Suction Dredger in extreme weather such as grade-8 strong gale, thunderstorm and heavy rain to prevent hull tilting and water inflow accidents.
- Do not adjust synchronous winches or disassemble high-pressure conveying pipelines when the dredger is under full-load operation; all daily maintenance and disassembly work must be completed after complete power cutoff.
- The actual dredging depth shall never exceed the rated 22m upper limit to prevent burnout of the 20-inch high-flow dredging pump and main power engine.
- Keep a safe distance from underwater exposed hard rocks and dense aquatic plant clusters to avoid winding and structural damage to the cutter head of the 20-inch cutter suction dredger.
2. Daily Maintenance Precautions
- Clean residual sludge inside the 20-inch pump cavity and high-pressure pipeline after daily work to prevent sediment solidification and permanent pipeline blockage.
- Regularly add dedicated anti-wear lubricating oil to winch rotating parts and hydraulic components, replace aging sealing accessories on a scheduled cycle.
- Inspect the hull five-layer anti-rust coating every month, repair peeling and damaged paint in time to avoid metal corrosion and hull water leakage.
- For long-term idle 20-inch cutter suction dredger, drain residual water inside the pump cavity, park the equipment in dry dock and cover with customized dustproof & rainproof protective cover.
3. Fault Handling Precautions
- Once abnormal noise or severe vibration occurs during high-load operation, cut off power and stop construction immediately; it is forbidden to disassemble internal parts with electricity to avoid safety risks.
- In case of core faults such as 20-inch pump damage and main power system failure, contact official after-sales team for professional support; private unauthorized disassembly will invalidate the official product warranty.
- All damaged vulnerable parts must be replaced with original factory exclusive accessories to avoid secondary damage to the whole dredger caused by mismatched non-original accessories.