Multistage Pumps

FILIPUSI manufactures and exports heavy-duty multistage centrifugal pumps engineered for high dynamic heads up to 1,000m. Delivered with modular ring-section and compact vertical inline architectures for power generation, mining, municipal water supply, process industries, and water treatment plants worldwide.

Designed to achieve peak dynamic heads through stage-by-stage pressure accumulation, these pumps deliver continuous 24/7 reliability while eliminating severe cavitation and excessive energy loss in high-demand industrial fluid networks. Available in both horizontal segmental (ring-section) and vertical inline configurations to match your footprint and piping layout requirements.

Applicable to: Municipal & High-Rise Water Boosting, Mining Dewatering & Tunneling, Industrial Water Treatment & RO Filtration, HVAC & District Energy, High-Pressure Washdown, Boiler Feed Systems, and SWRO Seawater Desalination.

Multistage Pump Series & Configurations

FILIPUSI offers two primary multistage pump architectures to match your application requirements:

All pumps undergo 100% hydrostatic pressure testing and dynamic shaft balancing before shipment. Every rotating assembly is balanced to ISO 1940 G6.3 grade.

Core Advantages & Engineering Features

Key Industries & Applications

• Boiler Feed & Power Generation: High-pressure feedwater delivery for steam boilers in power plants, cogeneration facilities, and industrial process steam systems. Heads up to 1,000m with balance disc design for continuous 24/7 operation.
• SWRO Seawater Desalination: High-pressure feed pumps for reverse osmosis desalination plants. Super Duplex 2507 construction withstands 60-80 bar operating pressures in raw seawater service.
• Mining Dewatering & Tunneling: High-head dewatering pumps for underground mines, tunnel construction, and quarry operations. Hardened alloy impellers resist abrasive wear from slurry and solids.
• Municipal & High-Rise Water Boosting: Vertical inline multistage pumps for water supply in high-rise buildings, hotels, hospitals, and municipal distribution networks. VFD control saves 30-50% energy.
• Industrial Water Treatment & RO Filtration: Feed pressure for ultrafiltration, nanofiltration, and reverse osmosis systems in food & beverage, pharmaceutical, and semiconductor manufacturing.
• HVAC & District Energy: High-rise building HVAC circulation, district heating and cooling networks, and geothermal heat distribution loops.

Multistage Pump for Boiler Feed Water in Steam Power Plants

Horizontal ring-section multistage centrifugal pumps are the industry standard for delivering high-pressure feedwater to steam boilers in power plants, cogeneration facilities, and industrial process steam systems. The segmented casing design achieves heads of 200-1000m with smooth, low-pulsation discharge that protects boiler tubes and control valves. The balance disc/drum mechanism neutralizes up to 95% of axial thrust, ensuring continuous 24/7 operation with extended bearing and mechanical seal service life. High-temperature mechanical seal options with flush plans (Plan 11/21) support feedwater temperatures up to 160°C.

Multistage Pump for SWRO Seawater Reverse Osmosis Desalination

Seawater reverse osmosis (SWRO) plants require high-pressure feed pumps capable of delivering 60-80 bar operating pressure to overcome osmotic pressure and drive water through semi-permeable membranes. FILIPUSI multistage pumps with Super Duplex 2507 or Duplex 2205 stainless steel construction resist chloride pitting and corrosion in high-salinity seawater service. The smooth, low-pulsation discharge protects RO membranes from pressure shock and extends membrane service life. All wetted components come with material test reports (MTR 3.1) for full traceability.

Multistage Pump for Mining Dewatering & High-Pressure Water Injection

Underground and open-pit mining operations rely on multistage centrifugal pumps for pit dewatering, tunnel construction drainage, and high-pressure water injection for dust suppression and hydraulic mining. The horizontal ring-section design handles heads of 300-1000m and continuous 24/7 operation required in mining environments. Hardened alloy impellers and wear rings resist abrasive wear from slurry and solids, while the back pull-out configuration allows quick maintenance without disconnecting pipework. VFD integration enables variable flow control to match changing dewatering demands.

Vertical Multistage Pump for High-Rise Building Pressure Boosting

Vertical inline multistage pumps (VS series) maintain consistent water pressure across all floors of high-rise residential and commercial buildings, hotels, hospitals, and municipal distribution networks. The compact inline design installs directly into horizontal pipelines without concrete inertia bases, reducing footprint requirements by up to 50% compared to horizontal pump configurations. VFD-controlled booster sets deliver energy savings of 30-50% by adjusting pump speed to match actual demand, while the all-stainless-steel construction eliminates rust contamination and ensures long service life in clean water service.

Quality Control & Testing

Every FILIPUSI multistage pump undergoes a comprehensive quality control process before shipment to ensure reliable performance in the field:

Selection Guide & FAQ

Q1: When should a project specify a multistage centrifugal pump instead of a single-stage pump?
A1: Multistage pumps are required when system dynamic head requirements exceed 160m or when high pressure must be generated efficiently without running single impellers at destructively high speeds. They provide smooth, stage-by-stage pressure buildup with higher energy efficiency and lower risk of cavitation.

Q2: How does the balance disc/drum mechanism prevent premature bearing failure in high-head applications?
A2: In high-pressure multistage pumps, cumulative axial thrust can reach several tons. FILIPUSI's automatic balance system continuously counters this axial force hydraulically using discharge pressure, neutralizing up to 95% of the thrust load and greatly extending bearing and seal service life.

Q3: What is the difference between vertical inline and horizontal ring-section multistage pumps?
A3: Vertical inline multistage pumps (VS series) are compact, all-stainless-steel, and install directly into pipelines like a valve, saving up to 50% floor space. They are ideal for flows up to 270 m³/h and heads up to 350m. Horizontal ring-section pumps handle much higher flows (up to 1,350 m³/h) and heads (up to 1,800m), and are preferred for boiler feed, SWRO, and mining applications.

Q4: What materials are recommended for SWRO seawater desalination service?
A4: For SWRO high-pressure feed service (60-80 bar), we recommend Super Duplex Stainless Steel 2507 for all wetted components, with Duplex 2205 as a cost-effective alternative for lower-pressure stages. Silicon carbide mechanical seals with Viton elastomers are standard. All materials come with MTR 3.1 test reports.

Q5: Can multistage pumps be operated with variable frequency drives (VFD)?
A5: Yes. All FILIPUSI multistage pumps are VFD-compatible, allowing precise flow and pressure control while reducing energy consumption by 30-50% compared to fixed-speed operation. Standard Modbus and BACnet protocol support enables seamless integration into building management systems (BMS) and industrial automation networks.

TALK TO A FILIPUSI FLUID ENGINEER NOW »

Product Videos & Manufacturing

Related Pump Categories

Explore other pump series: End Suction Pumps | Vertical Inline Pumps | Double Suction Pumps | Marine & Seawater Pumps

Certifications & Quality Assurance