FS End Suction Pump
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FS Series Single-Stage End Suction Centrifugal PumpStandardized Industrial Fluid Handling | Back Pull-Out Maintenance | Universal ISO 2858 Replacement Engineered in full accordance with ISO 2858 and GB/T 5767 dimensional specifications, the FILIPUSI FS Series provides exceptionally versatile liquid transfer performance. Featuring an advanced close-coupled modular design, it empowers industrial operators to service rotating assemblies effortlessly while keeping pipe network connections intact. With flows from 3.5 to 1,200 m³/h and heads up to 160 meters, the FS series is the workhorse choice for HVAC, cooling towers, water boosting, and industrial process cooling worldwide.
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Performance Advantages & Engineering Highlights
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ISO Standard Conformity Designed around international ISO 2858 dimensions, allowing hassle-free drop-in replacement and seamless integration into global industrial pipelines. |
Streamlined Serviceability The back pull-out configuration allows complete removal of the bearing bracket and impeller without disconnecting suction/discharge piping, reducing downtime by up to 60%. |
Superior Hydraulic Yield Precision-machined volute channels and optimized impellers maximize fluid velocity while reducing energy expenditure and mechanical wear over continuous duty cycles. |
Operational Principle & Structural Characteristics
Driven by an electric motor at standard industrial speeds (2900 rpm at 50Hz / 3500 rpm at 60Hz), the pump shaft spins the dynamic impeller to draw fluid horizontally along the axial suction center. Centrifugal acceleration propels the liquid outward into the volute casing, smoothly converting kinetic velocity into pressurized discharge. The close-coupled design eliminates shaft coupling alignment issues, reducing vibration and extending mechanical seal service life.
| • | Horizontal End-Suction Topology: Straightforward horizontal layout provides stable fluid intake and uniform pressure development across demanding duty cycles. |
| • | Industrial Mechanical Sealing: Outfitted with high-grade wear-resistant mechanical seals (FS-24/BSE4 standard) to ensure zero leakage and prolonged continuous duty. |
| • | Rigid Steel Baseplate Assembly: Pre-aligned heavy baseplate dampens vibration, guarantees quiet operation (<75 dB), and extends bearing service life by up to 40%. |
| • | Corrosion-Resistant Metallurgy: Options include high-purity 304, 316/316L, Duplex 2205, Bronze, and specialized alloy steels tailored for various chemical and industrial liquids. |
| • | Close-Coupled Compact Design: Motor mounts directly to the pump bracket, eliminating shaft coupling alignment, reducing overall footprint by 30%, and simplifying installation in space-constrained mechanical rooms. |
Performance & Hydraulic Curves
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General Technical Parameters
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Engineering Specification
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Operational Capability
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Tailored Engineering Options
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Volumetric Flow Rate (Q)
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3.5 – 1,200 m³/h
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Custom impeller trimming for exact duty points
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Total Dynamic Head (H)
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Up to 160 meters
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High-pressure customized volute casing modifications
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Motor Power Range
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0.75 kW – 250 kW
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IE2/IE3/IE4 premium efficiency, explosion-proof (ExdIIBT4)
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Inlet / Outlet Size
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DN32 – DN300
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DIN / ANSI / JIS flange standards on request
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Fluid Temperature Range
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-20°C to +120°C
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High-temp mechanical seal flushes (up to +180°C with cooling jacket)
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Structural Metallurgy
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304 / 316L Stainless Steel (standard)
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Duplex 2205 / Cast Iron / Bronze / CD4MCu / Hastelloy options
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Pressure Rating
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PN10 / PN16 (standard)
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PN25 / PN40 high-pressure casings
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Electrical Drive
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380V / 50Hz, 3-phase (Standard IP55 IE3)
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220V / 415V / 440V / 460V, 60Hz, VFD-ready
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Mechanical Seal
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FS-24 / BSE4 (silicon carbide faces, standard)
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Double mechanical seals, cartridge seals, flush plans (Plan 11/21/32)
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Certifications
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CE, ISO 9001:2015
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CCS / ABS / DNV marine certification on request
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Key Applications & Industry Use Cases
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HVAC & Commercial Buildings Chilled and hot water circulation for high-rise residential complexes, hotels, hospitals, airports, and shopping malls. The close-coupled compact design fits easily in mechanical rooms with limited space, while the back pull-out feature minimizes downtime during scheduled maintenance. |
Cooling Tower Circulation Reliable water circulation for evaporative cooling systems in power plants, refineries, petrochemical facilities, and large industrial complexes. 304/316 stainless steel construction resists corrosion from treated cooling water, and optional bronze fittings provide extra protection in high-salinity environments. |
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Industrial Process Cooling Induction furnace cooling, die-cast thermal regulation, injection molding coolant circuits, CNC machine tool cooling, and coolant filtration plants. The FS series handles continuous 24/7 operation with low vibration and consistent pressure, critical for maintaining precise process temperatures. |
Water Supply & Pressure Boosting Municipal water distribution networks, residential and commercial water boosting skids, agricultural irrigation systems, and industrial process water supply. VFD-compatible motors enable precise pressure control and energy savings of 30-50% compared to fixed-speed operation. |
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Data Center Cooling Low-pulsation circulation for multi-megawatt chillers, CRAC units, and liquid cooling systems requiring zero thermal fluctuation and continuous uptime. Redundant pump configurations and quick-change mechanical seals ensure maximum availability for mission-critical data facilities. |
Marine & Offshore Seawater cooling, ballast water transfer, and general service water on commercial ships, offshore platforms, and floating production facilities. Bronze and Duplex stainless steel options resist chloride pitting and corrosion, with CCS/ABS/DNV certification available for classified vessel installations. |
How to Select the Right FS Model
With over 50 standard configurations available, selecting the correct FS 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 FS series covers 3.5 to 1,200 m³/h. 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 FS series delivers heads up to 160m. For heads exceeding 160m, consider our VS multistage pump series. |
| 03 | Fluid Properties & Material: Standard 304 stainless steel suits clean water up to 80°C and mildly corrosive fluids. Specify 316/316L for seawater, high-chloride water, or chemical feed. Specify Duplex 2205 for extreme corrosion (e.g., concentrated acids, high-salinity brine). For fluids above 120°C, specify high-temperature mechanical seals with a cooling jacket. |
| 04 | Installation & Maintenance Requirements: Choose the close-coupled FS series for space-constrained installations and simpler alignment. If you require frequent maintenance access or have larger pumps (above 55kW), consider the SCW back pull-out long-coupled series for easier rotating assembly removal without disconnecting pipework. |
Need help selecting? FILIPUSI engineers provide free pump selection services. Send us your required flow, head, fluid properties, voltage, and flange standard, and we will recommend the optimal FS model with a full performance curve and dimensional drawing within 24 hours.
FS Series End Suction Pumps - Frequently Asked Questions
Q1: How does the back pull-out feature cut overall plant maintenance costs?
A1: Technicians can pull out the motor and internal rotating module without unbolting the pump body from the suction/discharge pipes. This substantially reduces downtime, eliminates re-alignment headaches, and lowers maintenance overhead by up to 60% compared to non-back-pull-out designs.
Q2: Can FILIPUSI supply custom electrical standards for global installations?
A2: Yes, we provide motors matching various global power grids, including 220V/380V/415V/440V/460V at 50Hz or 60Hz, along with explosion-proof (ExdIIBT4) or IE3/IE4 premium efficiency motor options. All motors are IP55 protected with Class F insulation as standard.
Q3: What industries typically deploy FS end-suction pumps?
A3: They are widely utilized in HVAC climate control, industrial water boosting, municipal distribution, agricultural irrigation systems, cooling tower circulation, data center cooling, marine seawater service, and general manufacturing fluid processing.
Q4: What is the difference between the FS close-coupled and SCW long-coupled series?
A4: The FS series uses a close-coupled design where the motor mounts directly to the pump bracket, eliminating shaft coupling alignment and saving 30% floor space. The SCW series uses a long-coupled design with a spacer coupling, allowing complete rotating assembly removal for maintenance without disconnecting pipework. FS is ideal for smaller pumps (up to 55kW) in space-constrained rooms; SCW is preferred for larger pumps and critical-process applications requiring frequent maintenance.
Q5: Can the FS series handle seawater or corrosive chemical fluids?
A5: Standard FS pumps use 304 stainless steel, suitable for clean freshwater and mildly corrosive fluids. For seawater, high-chloride water, or chemical feed, we recommend 316/316L stainless steel with silicon carbide mechanical seals. For extreme corrosion (concentrated acids, high-salinity brine), we offer Duplex 2205, Hastelloy, or CD4MCu constructions with double mechanical seals and flush plans.
Q6: What is the recommended maintenance schedule for FS series pumps?
A6: 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 impeller and wear ring 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 FS models.
Need Custom End-Suction Pumping Solutions?
FILIPUSI delivers tailored OEM/ODM manufacturing—offering precise hydraulic selection, specialized materials, and complete skid-mounted pump packages for worldwide B2B distributors.
Industrial Water Pump Manufacturer & Exporter | www.filipusi.com
Related Pump Series & Categories
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SW High-Efficiency Series Optimized hydraulic design for maximum energy efficiency in continuous-duty HVAC and cooling applications. Lower operating cost than standard FS models. |
SCW Back Pull-Out Series Long-coupled design with spacer coupling for easy maintenance without disconnecting pipework. Preferred for large pumps and critical-process applications. |
VS Multistage Series Vertical inline multistage pumps for heads above 160m. All-stainless-steel construction, compact footprint, up to 350m discharge head. precision-cast stainless steel impellers. |
Other categories: Vertical Inline Centrifugal Pumps | Double Suction Split Case Pumps | Marine & Shipboard Pumps
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