Vertical Double Suction Pump

Vertical Double Suction Split Case Pumps

Space-Saving High-Volume Fluid Handling | Vertical Axially Split Casing | 20 Years of Field Expertise

FILIPUSI vertical double suction split case pumps are engineered for high-capacity fluid transfer in space-constrained industrial environments. The vertical orientation reduces required floor space by up to 40% compared to horizontal configurations, making them ideal for retrofit projects, existing pump stations, and mechanical rooms with limited footprint. The axially split casing allows full access to the rotating assembly without disconnecting piping.

Available with flows from 80 to 12,000 m³/h and heads from 5 to 220 meters, the vertical split case series delivers reliable high-flow performance with balanced double-suction impeller technology. The double-suction design cancels axial hydraulic thrust, enabling vibration-free operation at extreme flow rates with extended bearing and seal service life. Standard cast iron/ductile iron construction with stainless steel and bronze options available for corrosive service.

Applicable to: Industrial Cooling Towers, Municipal Water Supply & Drainage, Petrochemical Processing, Steel & Mining Infrastructure, Power Plant Auxiliary Cooling, Large-Scale HVAC, Water Treatment Plants, and Flood Control Stations.

Core Advantages & Engineering Features

Operational Principle & Structural Characteristics

The FILIPUSI vertical double suction split case pump operates on the principle of dual-sided impeller feeding in a vertical orientation. Fluid enters the suction nozzle and splits into two streams, each flowing to one side of the double-suction impeller. This symmetrical inflow design cancels out axial thrust forces, allowing the pump to handle extremely high flow rates with minimal vibration. The vertical orientation places the motor above the pump body, reducing the overall footprint while maintaining easy access to the rotating assembly through the axially split casing.

• Vertical Axially Split Casing: The pump casing is split along the horizontal centerline in a vertical assembly, allowing the upper casing half to be removed for complete access to the rotating assembly without disturbing pipeline connections.
• Double-Suction Impeller: Fluid enters from both sides of the impeller simultaneously, balancing axial hydraulic thrust and eliminating the need for thrust bearings in most configurations.
• Top-Mounted Motor: The motor is mounted vertically above the pump body, significantly reducing floor space requirements compared to horizontal baseplate-mounted configurations.
• Between-Bearings Design: The impeller is supported by bearings on both upper and lower sides, providing exceptional shaft stability and allowing operation at high flows with minimal shaft deflection.
• Wear Ring Protection: Replaceable wear rings protect the casing from wear and allow easy restoration of original clearances without replacing the entire casing.
• Rigid Vertical Base: Heavy fabricated steel base with integral grouting holes ensures stable vertical mounting and precise alignment in pump stations and industrial facilities.

Technical Specifications

Key Industries & Applications

• Industrial Cooling Towers: High-efficiency water circulation for power plants, refineries, and manufacturing facilities. The vertical design fits easily in existing cooling tower pump rooms with limited floor space.
• Municipal Water Supply & Drainage: Raw water intake from rivers and reservoirs, treated water distribution, and stormwater/flood control stations. Vertical mounting allows installation in existing wet pits and pump stations.
• Petrochemical Processing: Corrosion-resistant fluid handling for volatile environments. SS316/duplex options available for chemical transfer and process cooling in refineries and petrochemical plants.
• Steel & Mining Infrastructure: Heavy-duty scale pit flushing, mineral processing water supply, and blast furnace cooling. The robust vertical construction handles continuous 24/7 operation in demanding industrial environments.
• Power Plant Auxiliary Cooling: Auxiliary cooling water systems for thermal and nuclear power stations. The space-saving vertical design is ideal for retrofit projects in existing power plant pump houses.
• Large-Scale HVAC & District Energy: Chilled and hot water circulation for district heating/cooling networks, large commercial complexes, and data centers. VFD control enables energy savings of 30-50%.

Cross-Sectional Structure & Component Key

How to Select the Right Vertical Model

Selecting the correct vertical double suction pump requires matching four core parameters to your system requirements:

01. Required Flow Rate (Q): Determine the maximum and minimum flow your system demands. The vertical series covers 80 to 12,000 m³/h. For flows above 500 m³/h in space-constrained rooms, vertical split case pumps are the most efficient choice.
02. Total Dynamic Head (TDH): Calculate total head including static elevation, friction loss in piping and heat exchangers, and required terminal pressure. The vertical series delivers heads up to 220m.
03. Available Floor Space: Measure your pump room footprint. If floor space is limited (existing pump stations, retrofit projects, mechanical rooms), choose the vertical configuration to save up to 40% floor space. If floor space is abundant and flow exceeds 12,000 m³/h, consider the horizontal series.
04. Fluid Properties & Material: Clean freshwater and industrial cooling = Cast Iron/Ductile Iron. Corrosive media = SS304/SS316 or Bronze. Highly corrosive = Duplex 2205. For fluids above 120°C, specify high-temperature mechanical seals with cooling jacket.

Quality Control & Testing

• 100% Hydrostatic Pressure Testing: All pump casings are hydrostatically tested at 1.5x maximum working pressure for a minimum of 10 minutes, with zero leakage acceptable.
• Performance Verification Testing: Each pump is performance-tested on our in-house test bench (up to 1,600 kW capacity) to verify flow rate, head, efficiency, and NPSHr against the published performance curve.
• Material Traceability: All wetted components come with material test reports (MTR 3.1) verifying chemical composition and mechanical properties.
• Dynamic Shaft Balancing: All rotating assemblies are dynamically balanced to ISO 1940 G6.3 grade to minimize vibration and extend bearing and seal life.
• Vertical Alignment Verification: Each vertical pump-motor assembly is precision-aligned to ensure perfect vertical shaft alignment, critical for long bearing life in vertical configurations.

Frequently Asked Questions

Q1: What is the main advantage of vertical over horizontal split case pumps?
A1: The primary advantage is space savings. Vertical mounting reduces required floor space by up to 40%, making vertical pumps ideal for existing pump stations, retrofit projects, and mechanical rooms with limited footprint. Vertical pumps also allow direct installation in wet pits and sumps.

Q2: Can vertical double suction pumps handle the same flow rates as horizontal models?
A2: Vertical models cover flows up to 12,000 m³/h, while horizontal models can reach up to 20,000 m³/h. For most industrial and municipal applications below 12,000 m³/h, vertical pumps provide equivalent performance with a smaller footprint.

Q3: How is maintenance performed on a vertical split case pump?
A3: The axially split casing allows the upper casing half to be removed, providing full access to the rotating assembly without disconnecting suction or discharge piping. The motor can be lifted vertically to access the impeller and seals. This reduces maintenance downtime by up to 70%.

Q4: What materials are available for vertical double suction pumps?
A4: Standard construction uses cast iron or ductile iron for freshwater and industrial cooling service. For corrosive media, we offer SS304/SS316 stainless steel, Nickel-Aluminum Bronze, and Duplex Stainless Steel (2205). All materials come with MTR 3.1 test reports.

Q5: Can vertical pumps be installed in existing pump stations without modification?
A5: Yes. FILIPUSI specializes in custom-engineered vertical pumps for retrofit projects. We can manufacture pumps with custom flange-to-flange dimensions, shaft heights, and base mounting patterns to match existing pump station boundaries and legacy flanges, minimizing civil modification.

Q6: What is the lead time for vertical double suction pumps?
A6: Standard cast iron configurations usually take 15-25 working days. Custom material specifications (stainless steel, bronze, or duplex) take 30-45 days. Large pumps (above DN500) may require 45-60 working days. Third-party inspection adds 5-10 working days.

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