Inline Booster Pump
Vertical Multistage Inline Booster Pump
The FILIPUSI inline booster pump is a vertical multistage centrifugal pump designed for high-pressure water transfer in a compact inline footprint. By mounting multiple stainless steel impellers in series on a common shaft, this pipeline booster pump delivers heads up to 276 meters while installing directly into horizontal piping like a valve. With suction and discharge ports on the same centerline, it eliminates the need for concrete inertia bases and reduces floor space requirements by up to 50% compared to horizontal multistage pumps.
Manufactured with all-stainless-steel wetted parts (304 standard, 316/316L optional), the FILIPUSI inline booster pump range covers flows from 1 to 420 m³/h and heads up to 276 meters. The compact vertical design makes it the preferred choice for high-rise building water supply, reverse osmosis systems, HVAC circulation, boiler feed water, and industrial process water boosting worldwide.
Technical Specifications
| Parameter | Range / Specification |
|---|---|
| Flow Rate (Q) | 1 – 420 m³/h |
| Discharge Head (H) | Up to 270 meters |
| Motor Power | 0.37 kW – 205 kW |
| Speed | 2900 rpm (50Hz) / 3500 rpm (60Hz) |
| Inlet / Outlet Size | DN25 – DN300 (same centerline, inline flanges) |
| Wetted Material | 304 stainless steel (standard), 316 / 316L (optional) |
| Mechanical Seal | Cartridge mechanical seal (silicon carbide faces) |
| Fluid Temperature | -20°C to +120°C (hot water type up to +160°C) |
| Pressure Rating | PN16 standard, PN25 / PN40 optional for high-pressure models |
| Voltage / Frequency | 380V/50Hz 3-phase standard; 220V/415V/440V/460V, 50/60Hz on request |
| Motor Protection | IP55, Class F insulation, IE3/IE4 premium efficiency |
| Certifications | 100% Hydrostatic & Performance Tested | Dynamic Shaft Balanced |
Core Advantages & Engineering Features
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Compact Inline Design Suction and discharge ports are aligned on the same centerline, allowing the pump to install directly into horizontal pipelines like a valve. No concrete inertia base required, saving up to 50% floor space. |
All-Stainless-Steel Construction Every wetted component — pump body, impellers, diffusers, shaft, and bolts — is manufactured from 304 stainless steel as standard. 316/316L available for corrosive or high-purity service. |
High Head, Low Vibration Multiple impeller stages generate high discharge pressure through incremental energy addition. The vertical inline arrangement provides stable operation with minimal vibration and cavitation risk. |
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Easy Cartridge Seal Maintenance Cartridge-style mechanical seal allows quick replacement without removing the motor or disconnecting piping. Typical seal service life: 8,000–12,000 hours. |
VFD & PLC Compatible All models are compatible with variable frequency drives (VFD) and building management systems (BMS) for precise pressure control and 30–50% energy savings. |
100% Factory Tested Every pump undergoes hydrostatic pressure testing and performance verification on our in-house hydraulic test bench before shipment. Material test reports (MTR 3.1) available on request. |
Typical Applications
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High-Rise Water Supply Pressure boosting for high-rise residential buildings, hotels, hospitals, and commercial complexes. VFD-controlled booster sets maintain consistent pressure across all floors, even during peak demand. |
Reverse Osmosis & Water Treatment High-pressure feed pumps for reverse osmosis (RO), ultrafiltration (UF), deionized water, and seawater desalination systems. SS316L option for high-purity and corrosive chemical feed. |
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HVAC & Cooling Circulation Chilled and hot water circulation for HVAC systems, cooling towers, data centers, and commercial buildings. The quiet operation and compact footprint fit easily in mechanical rooms. |
Boiler Feed & Hot Water Feedwater supply for steam boilers and hot water heating systems. High-temperature mechanical seal options allow operation with fluid temperatures up to 160°C. |
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Industrial Process Water High-pressure washing, cleaning systems, machine tool coolant, filtration plants, and general industrial water transfer. SS316L construction available for corrosive process fluids. |
Fire Fighting Jockey Pumps Pressure maintenance in fire protection systems. The compact inline design and high head make these pumps ideal for jockey service in sprinkler systems and standpipes. |
Inline Booster Pump Applications & Advantages
Silent Inline Booster Pump for High-Rise Residential Buildings
The silent tube-type inline booster pump is specifically designed for noise-sensitive installations in high-rise residential buildings, luxury apartments, hotels, and hospitals where conventional pump room noise would disturb occupants. The pump is installed directly inside the water supply pipeline like a valve, with the motor and hydraulic section enclosed in a sound-dampening tube that reduces operating noise to below 55 dB(A) at one meter. This ultra-quiet operation allows installation in living areas, corridors, and ceiling spaces without dedicated soundproof pump rooms, saving valuable floor space in high-density urban developments.
Inline Booster Pump for Retrofit Installation in Existing Pipelines
One of the key advantages of the inline booster pump is its ability to be installed directly into existing water supply pipelines during retrofit or upgrade projects. The suction and discharge nozzles are aligned on the same centerline with matching flange dimensions, allowing the pump to be inserted into the pipeline without re-routing pipework or modifying the existing plant room layout. This makes the inline booster pump ideal for upgrading aging water supply systems in older buildings where space is limited and pipeline modifications would be costly and disruptive. The compact design also allows installation in ceiling voids, service shafts, and other confined spaces where conventional pump sets cannot fit.
Stainless Steel Inline Booster Pump for Commercial HVAC Systems
Commercial HVAC systems in office buildings, shopping malls, airports, and data centers require reliable water circulation for chilled water and hot water loops. The all-stainless-steel inline booster pump (AISI 304 standard, AISI 316/316L optional) provides corrosion-resistant operation in treated HVAC water, while the inline design minimizes footprint in mechanical rooms with limited space. The smooth, low-pulsation discharge protects heat exchangers and cooling coils from pressure fluctuations, and VFD compatibility enables precise flow control to match varying HVAC load demands between day and night, summer and winter. The silent tube-type design is particularly beneficial for HVAC installations in noise-sensitive areas such as hospital patient wings and hotel guest floors.
Inline Booster Pump vs. Traditional Vertical Multistage Pump: Which to Choose?
The primary difference between an inline booster pump and a traditional vertical multistage pump lies in the installation configuration and noise profile. A traditional vertical multistage pump (such as the VS series) is floor-mounted on a baseplate with the motor on top and the hydraulic section below, requiring dedicated pump room space and potentially generating more noise due to the exposed motor and hydraulic section. An inline booster pump is installed directly in the pipeline with suction and discharge on the same centerline, and often features a sound-dampening enclosure that significantly reduces operating noise. Choose the inline booster pump when noise is a critical concern, space is extremely limited, or the pump must be installed outside a dedicated pump room. Choose the traditional vertical multistage pump when easy maintenance access, higher power options, or lower initial cost is the priority.
How to Select the Right Inline Booster Pump
With multiple configurations available, selecting the correct inline multistage pump requires matching three core parameters to your system requirements:
| 01 | Required Flow Rate (Q): Determine the maximum and minimum flow your system demands. Select a pump that operates at or near its Best Efficiency Point (BEP) at your design flow. Running continuously below 50% of BEP causes recirculation, cavitation, and premature seal failure. |
| 02 | Total Dynamic Head (TDH): Calculate total head including static elevation, friction loss in piping and fittings, and required terminal pressure. The inline booster pump series delivers heads up to 240m. For higher heads, consider our horizontal ring-section multistage pumps. |
| 03 | Fluid Properties & Material: Standard AISI 304 stainless steel suits clean water up to 80°C and mildly corrosive fluids. Specify AISI 316/316L for seawater, high-chloride water, chemical feed, or pharmaceutical applications. For fluids above 100°C, specify high-temperature mechanical seals. |
Need help selecting? FILIPUSI engineers provide free pump selection services. Send us your required flow, head, fluid properties, and voltage, and we will recommend the optimal model with a full performance curve and dimensional drawing within 24 hours. Request pump selection »
Frequently Asked Questions
Q1: What is the difference between an inline booster pump and a horizontal multistage pump?
A1: An inline booster pump mounts vertically with suction and discharge on the same centerline, installing directly into horizontal piping like a valve. It requires no concrete base and saves up to 50% floor space. A horizontal multistage pump requires a baseplate and L-shaped piping connections. The inline design is preferred for space-constrained installations; the horizontal design handles higher flows and NPSH-critical applications.
Q2: Can the inline booster pump handle seawater or corrosive fluids?
A2: Standard pumps use AISI 304 stainless steel, suitable for clean freshwater and mildly corrosive fluids. For seawater, high-chloride water, or chemical feed, we recommend the AISI 316/316L stainless steel option with silicon carbide mechanical seals. For extreme corrosion, contact our engineering team for custom material configurations.
Q3: Is this inline pump suitable for reverse osmosis (RO) systems?
A3: Yes. The all-stainless-steel construction and high head capability make these pumps widely used as RO feed pumps, booster pumps, and high-pressure circulation pumps in water treatment plants. SS316L versions are available for high-purity and corrosive RO feed applications.
Q4: Can the inline booster pump be controlled by a VFD?
A4: Yes. All FILIPUSI inline booster pumps are fully VFD-compatible. Equipping the pump with a variable frequency drive allows precise pressure and flow control, delivering energy savings of 30–50% compared to fixed-speed operation. Modbus and BACnet protocols are available for BMS integration.
Q5: What is the recommended maintenance schedule?
A5: For clean water service: inspect for leaks and noise monthly; check motor bearing temperature every 3 months; replace the mechanical seal every 8,000–12,000 hours; inspect impellers and diffusers every 18,000–24,000 hours. For corrosive or abrasive fluid service, reduce all intervals by 50%.
Need a Custom Inline Booster Pump?
FILIPUSI delivers factory-direct inline multistage pumps with full OEM/ODM customization. Send us your duty point for a quotation within 24 hours.
REQUEST A QUOTE »Related Pump Series
|
VS Vertical Multistage Pump Vertical multistage centrifugal pumps with flows up to 270 m³/h and heads up to 350m. |
Horizontal Multistage Pump Ring-section horizontal multistage pumps for heads up to 1030m in boiler feed and RO systems. |
LD Inline Centrifugal Pump Single-stage vertical inline pumps for large-flow HVAC and cooling tower circulation. |
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