WBS series marine sand pump batch order project ｜ China

Application scenario: WBS series horizontal split heavy-duty marine dredging sand pumps, CCS type approval, batch delivery of 36 units (WBS400/600/800/1000) for major shipyards in China and Southeast Asian dredging contractors. Transporting sea sand, river sand, gravel, silt, max particle 220 mm, solids content 65%; coastal chloride + electrochemical corrosion; ship cabin -18℃ to 42℃ humidity condensation causing rapid corrosion; China 380V/50Hz and export 440V/60Hz with ±25% fluctuation; compact pump room requiring quick maintenance; frequent water hammer loads. Old pumps non-split structure requiring 12h pipeline removal, cast iron wear-through in 3–4 months, no marine triple protection, narrow flow passage causing >15% energy loss, no online monitoring leading to sudden failures.

 

Solution content: M&W ENERGY SAVING adopts split horizontal split quick-open design; upper casing lifted while inlet/outlet remain fixed, maintenance 12h → 3.5h. Four sizes: WBS400 (400 mm / 1200–3200 m³/h / 24–48 m) for inland cutter suction; WBS600 (3600–9800 m³/h / 30–65 m / ≥84.5%) main hopper dredgers; WBS800 (11000–18500 m³/h / 40–78 m) large trailing suction dredgers; WBS1000 (20000–28000 m³/h / 45–85 m / 6300 kW) deep sea sand mining. Graded wear resistance: offshore Cr33 high-chrome (HRC≥62), inland 2507 duplex + silicon carbide liner; ZG20Mn casing -18℃ no brittle fracture; Sa2.5 blasting + epoxy zinc-rich + polyurethane marine coating; stainless fasteners 316L; semi-open 3D impeller + dual suction optimization; multi-seal system with flushing; marine VFD motor + anti-condensation heating + PT100/vibration/slurry monitoring integrated into dredging control system; interchangeable with Warman/IHC base.

 

Project results: energy saving 13%–19%, large dredgers save fuel/electricity over RMB 850,000 annually; wear life extended from 3–4 months to 16+ months; downtime reduced by 70%. Solves corrosion, abrasion, condensation failure, and water hammer leakage issues. Dual domestic + overseas delivery, scalable to global dredging fleet and Belt & Road projects.

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