Guangxi Haichang Split-Type Double-Suction Pump Integrated Water Supply Retrofit ｜ Guangxi · Nanning

Application scenario: Guangxi Haichang (Nanning local water engineering contractor), covering multiple water plants, industrial parks, and municipal booster stations along Guangxi rivers and coasts. Water sources include flood-season sediment, high-chloride and high-hardness groundwater. Southern China has high temperature, humidity, and severe salt spray corrosion. Compact pump rooms with strict shutdown control. Original S/SAP split pumps had low efficiency, valve throttling caused over 26% energy loss, impellers wore and scaled within 3–4 months, salt corrosion caused bolt seizure, constant-speed operation lacked intelligent control, maintenance required shutdown of pipeline sections.


Solution content: M&W ENERGY SAVING complete XS split-type double-suction pump supply: XS600-690 intake pump (3800–4800m³/h / 24–30m / ≥87.2%, 4 units with 2 standby, 10kV VFD linked to water level), XS400-650 delivery pump (1800–3200m³/h / 36–60m, 6kV VFD group control), XS300-580 coastal booster pump (316L corrosion resistance). 304/316L graded anti-scaling, ZG20Mn pump body epoxy zinc-rich + salt spray resistant dual coating, all 304 stainless steel fasteners, silicon carbide mechanical seal, 220V electric tracing. Split quick-disassembly structure reduces maintenance time by 70%, CFD impeller efficiency improves by 10–13 percentage points.


Project results: comprehensive energy saving rate 23%–27%, annual electricity savings per plant over 1.1 million RMB; overhaul cycle extended from 3–4 months to over 12 months, maintenance cost reduced by 65%; 24h VFD constant pressure reduces leakage. Benchmark for Beibu Gulf coastal water systems, replicable to Qinzhou, Beihai, and Fangchenggang.

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