The Dredge Pump Impeller (the rotating component of the dredge pump) is the core rotating component of the dredge pump. The dredge pump itself is a single-stage single-suction cantilever horizontal centrifugal pump, specifically designed for river dredging, waterway maintenance, land reclamation by filling, sand extraction and other scenarios, for transporting mixtures of sand, silt, gravel and other materials. Due to the high solid content (up to 40% volume concentration) of the dredging medium, sharp edges and corners (such as quartz sand, shells, crushed stones), fast flow rate and high impact load, the wear resistance requirement for the impeller is 3-5 times that of ordinary slurry pumps. Therefore, the dredge pump impeller must adopt an exclusive design featuring high-chrome iron + double-curved blades + closed structure.
This product is precisely cast using 27% high-chromium white iron (A05/KmTBCr26), with a chromium content of 23-30% and a hardness of HRC 56-63. It is manufactured through multiple processes including aluminum mold casting, overall quenching, precision machining, and dynamic balance correction. The blades are designed with double curved vanes - this is a standard configuration for international top dredge pump manufacturers such as DredgeYard. Options for 3 or 5 blades are available. They are specifically optimized for slurry transportation to enhance water efficiency while reducing energy consumption and operating costs.
Products features
Double Curved Vanes - Adopting the standard design of internationally renowned dredging pump manufacturers, with options of 3 or 5 blades. Specifically optimized for slurry transportation, these vanes enhance hydraulic efficiency, increase flow rate, and reduce energy consumption and operating costs.
Super Large Particle Throughput Capacity - Compatible with the WN/ZN/WSG series of dredging pumps, with the maximum passing particle size ranging from 14-90 mm (WN series) to 241-386 mm (ZN/WSG large pumps). It can smoothly discharge gravel, shells, and waste metals without the need for secondary crushing.
Closed Structure, 5 Blades as the Main Design - The ZN series and other efficient dredging pumps commonly adopt 5-blade closed impellers. This design is more stable and has higher efficiency (significantly higher efficiency compared to 3-blade impellers).
Dynamic Balance G6.3 Level - Each impeller undergoes dynamic balance correction before leaving the factory to ensure that the vibration value during operation is below the ISO 10816 standard limit, avoiding rapid bearing damage due to imbalance in the swaying conditions of the dredging vessel.
OEM/ODM
Mainstream Adaptation Series:
WN Series Dredging Pumps: 200WN, 250WN, 300WN, 450WN, 500WN, 600WN, 700WN, etc., single-stage single-suction cantilever horizontal type, wet parts 27% high chromium alloy
ZN Series High-efficiency Dredging Pumps: ZN250-ZN1000, closed 5-blade impeller, high chromium ≥ 27%, hardness HRC ≥ 56
G Series Sand and Gravel Pumps: 6/4, 8/6, 10/8, 12/10, 14/12, 16/14, 18/16, 20/18, etc. various diameters
WSG Double-shell Dredging Pumps: 100WSG-1000WSG, 3/4/5 blades available, wear-resistant material hardness > 60HRC
OEM/ODM Customization - supports processing based on provided drawings and samples, can be 100% restored according to the 2D/3D drawings provided by the customer, minimum order quantity (MOQ) is 1 piece, delivery time is 30-40 days
Supplier Introduction
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.
FAQs
Q: What are the differences between the Dredge Pump Impeller and the slurry pump impeller?
A: Both are centrifugal pump impellers, but the working conditions are different: The slurry pump impeller is designed to handle "erosive slurries" (with solid content < 30% and particle size < 20 mm); the Dredge Pump Impeller is designed to handle "extremely erosive + large particles + sharp edges + high flow rate" extreme conditions (with solid content up to 40% and particle size up to 386 mm). Therefore, the Dredge Pump Impeller requires a higher chromium content (27% vs 26%), double-curved blades (vs ordinary cylindrical/twisted blades), 3 or 5 blades as an option, and a larger passing particle size. In simple terms: The Dredge Pump Impeller is the "enhanced extreme version" of the slurry pump impeller.
Q: How do you choose between 3-blade and 5-blade?
A: Large-grained gravel, shells, scrap metal → 3-blade impeller (passing particle size up to 90 mm, extremely strong against blockage); river dredging, tailings transportation, land reclamation → 5-blade closed impeller (efficiency 74-87%, high hydraulic stability, ZN series standard configuration). They complement each other.
Q: How long can the A05 high-chromium impeller last in sand pumping conditions?
A: In river sand conditions with a sand content of ≤ 30%, the Cr28 high-chromium alloy impeller has an average lifespan of ≥ 8,000 hours (about 11 months of continuous use); the guard plate and bushing have a lifespan of ≥ 6,000 hours. If the medium is granite debris, basalt, etc., with extremely strong erosion conditions, it is recommended to upgrade to A07 material, which can extend the lifespan by 30-50%.
Q: Can the WN series and ZN series impellers be interchanged?
A: No. The hydraulic models, installation dimensions, and shaft systems of the WN series (200WN-700WN) and ZN series (ZN250-ZN1000) are completely different. However, we can make a high-chromium substitution according to the original drawings: WN series according to the WN original drawing, ZN series according to the ZN original drawing, 100% interchangeable, with a price approximately 1/3-1/2 of the original factory price.
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