Vertical Multistage Pump

All-Stainless-Steel Construction: Every wetted component — pump body, impellers, diffusers, shaft, and bolts — is manufactured from 304 stainless steel as standard, with 316/316L/Duplex stainless steel available for corrosive or high-purity applications. This eliminates rust contamination and ensures long service life even in aggressive water conditions.

Stage-by-Stage Pressure Accumulation: Multiple impellers mounted on a single shaft generate high discharge pressure through incremental energy addition at each stage. This design achieves heads up to 350m without the high rotational speeds, cavitation risk, and vibration associated with single-stage high-speed pumps.

Compact Inline Design: Suction and discharge nozzles are aligned on the same centerline, allowing the pump to install directly into horizontal pipelines like a valve. No concrete inertia base is required, reducing installation cost and floor space requirements by up to 50% compared to horizontal end suction pumps.

VFD & PLC Ready: All VS series pumps are compatible with variable frequency drives (VFD) and programmable logic controllers (PLC) for precise flow and pressure control. Standard Modbus and BACnet protocol support enables seamless integration into building management systems (BMS) and industrial automation networks.

Water Supply & Pressure Boosting

High-rise residential and commercial buildings, hotels, hospitals, and municipal water distribution networks rely on VS series pumps to maintain consistent water pressure across all floors, even during peak demand periods. VFD-controlled booster sets deliver energy savings of 30-50%.

Reverse Osmosis & Water Treatment

The all-stainless-steel construction makes VS pumps ideal for RO feed pressure, ultrafiltration systems, deionized water loops, and pharmaceutical water treatment. 316L/Duplex stainless steel options are available for high-purity and corrosive chemical feed applications.

Boiler Feed & Heating Systems

VS series pumps deliver feedwater to steam boilers and hot water heating systems at pressures matching boiler operating requirements. High-temperature mechanical seal options allow operation with fluid temperatures up to 160°C, making them suitable for district heating networks.

HVAC & Industrial Process Cooling

Data centers, manufacturing plants, and commercial facilities use VS pumps for chilled water circulation, cooling tower feed, and process fluid transfer. The quiet operation and compact footprint make them suitable for installation in mechanical rooms with limited space.

Q1: What is the difference between the VS series and a standard horizontal end suction pump?

A1: The VS series is a vertical inline multistage pump, meaning it installs directly in horizontal pipelines with suction and discharge on the same centerline, and uses multiple impellers to generate high pressure. A horizontal end suction pump is single-stage, requires a concrete foundation, and is typically limited to heads below 160m. The VS series offers up to 350m head, 50% smaller footprint, and no foundation requirement — but at a higher initial cost for equivalent flow rates.

Q2: Can the VS series handle seawater or corrosive fluids?

A2: Standard VS pumps use 304 stainless steel, which is suitable for clean freshwater and mildly corrosive fluids. For seawater, high-chloride water, chemical feed, or pharmaceutical applications, we recommend the 316 or 316L stainless steel or Duplex stainless steel option with silicon carbide mechanical seals. For extreme corrosion (e.g., concentrated acids), contact our engineering team for custom material configurations.

Q3: What is the recommended maintenance schedule for VS series pumps?

A3: For normal clean water service: inspect for leaks and unusual noise monthly; check motor bearing temperature every 3 months; replace mechanical seal every 8,000-12,000 hours (or annually for continuous 24/7 operation); inspect impellers and wear rings for corrosion or erosion every 18,000-24,000 hours. For corrosive or abrasive fluid service, reduce all intervals by 50%. FILIPUSI supplies OEM spare part kits including seals, bearings, impellers, and wear rings for all VS models.

Q4: Are performance curves and dimensional drawings available for all models?

A4: Yes. Every VS series model has a complete performance curve (flow vs. head, efficiency, NPSHr, and power consumption) and dimensional drawing (GA drawing with flange dimensions, mounting holes, and overall dimensions). These are available on each model's detail page (click the model number in the table above). We can also provide custom selection reports showing the exact operating point on the curve for your specific system requirements.