Heavy-duty Dredging Suction Pump

Heavy-duty dredging suction pump is a heavy-duty centrifugal pump specially developed for water conservancy dredging projects. Its core task is to mix the sediment such as sand, gravel, shells, etc. on the riverbed, lake bottom or seabed with water, and then transport the mixture through pipelines over long distances to the designated stacking area or reclamation area. Different from ordinary slurry pumps, dredging pumps must have stronger throughput capacity, higher tolerance for solid content, and thicker wear-resistant layer. The pump body usually adopts a double-shell structure - the outer pressure-bearing shell (malleable iron or cast steel) and the inner replaceable wear-resistant lining (high chromium alloy or rubber) are separated. After wear, only the inner lining needs to be replaced to restore performance.

Double-shell wear-resistant structure: The outer pump casing is made of QT500 ductile iron or ZG230-450 cast steel, which can withstand system pressure; the inner layer is a replaceable high-chromium alloy sleeve (Cr26, 60–65 HRC) or polyurethane lining, with a wall thickness of 20–50 mm. After wear, only the inner lining needs to be replaced, reducing the total life cycle cost.
Super large channel impeller: Closed or semi-open impeller, with a small number of blades (3–5 blades), wide flow channel, and a diameter of the flow passage up to 150 mm. The impeller material is the same as the sleeve - high-chromium alloy, and the surface can be sprayed with tungsten carbide for reinforcement.
Heavy-duty bearing assembly: A combination of double-row conical roller bearings and cylindrical roller bearings, with forced lubrication by thin oil, the bearing body has a cooling water jacket, and can withstand huge radial and axial loads.

1. The temperature of the pumped fluid must not exceed 40 degrees Celsius.
2. The pH value of the fluid is 4 to 10, excluding highly corrosive fluids.
3. The volume ratio of solid particles in the pumped fluid should be less than 20%.
4. The kinematic viscosity of the pumped fluid is 7×10-7 to 23×10-6 m²/s.
5. The density of the pumped fluid must not exceed 1200 kg/m³.

Heavy-duty dredging suction pumps are indispensable core equipment in the following large-scale water conservancy and mining projects:
River dredging: Removal of silt accumulation in small and medium-sized rivers, deepening of waterways, restoration of flood discharge channels
Lake dredging: Removal of sediment from nutrient-rich lakes such as Dianchi Lake and Taihu Lake, ecological restoration
Port and waterway dredging: Maintenance dredging of port pools, deepening of inbound waterways, dredging of the front of docks
Coastal land reclamation: Dredging of coastal mudflats, construction of artificial islands, filling of foundation for industrial zones along the coast
Sand mining and mining: River sand extraction, lake sand collection, hydraulic mining of gold deposits in sand mines
Reservoir sand discharge: Dredging of reservoir silt accumulation, dredging of the forebay of power stations, restoration of water diversion channels
Environmental protection projects: Removal of contaminated sediment, dredging of blackened water bodies' sediment, restoration of wetlands

Material selection: Quartz sand as the main material → A05 high chromium (60–65 HRC); Shell/coral → High chromium + tungsten carbide coating; Clay/silt → Rubber lining (more wear-resistant and lower cost); Containing corrosive media → Duplex stainless steel.
Drive selection: Fixed pumping station → Motor (high efficiency, low operation and maintenance cost); Mobile/area without electricity → Diesel engine (high power density, flexible); Submersible pump on dredger → Hydraulic motor (waterproof, adjustable speed).
Supporting equipment: Grate cleaning machine, slurry concentration meter, flowmeter, pipeline valves, expansion joints, control cabinet (with frequency conversion/soft start).
Customized services: Special flange standards, extended bearing frame, explosion-proof motor, high-altitude diesel engine, underwater motor (IP68), remote monitoring module, wear-resistant coating color.

CZME is a world-class manufacturer of high-performance pumping solutions, serving industries such as mining, construction, environmental protection, and water treatment. We specialize in the production of Slurry pumps, Dredge pumps, Desulfurization pump, Marine dredging pumps, and other industrial pumps designed for handling solid-laden, highly abrasive, and corrosive slurries. Our expertise in slurry and wastewater management makes us a trusted partner for clients worldwide.

1. How do we ensure quality?
There are always pre-production samples before mass production;
Final inspections are conducted before shipment.
2. What services can we provide?
Accepted delivery terms: FOB, CFR, CIF, EXW, FCA, CPT, DDP, DDU, express delivery;
Accepted payment currencies: US dollars, euros, Australian dollars, Hong Kong dollars, RMB;
Accepted payment types: T/T, L/C, MoneyGram, credit card, PayPal, Western Union, escrow;

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