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Multistage centrifugal pump FBME Series

FBME is a horizontal multistage centrifugal pump for clean or turbid liquids. Consult the curves by size and speed to determine the number of stages from the installation flow and total head.

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Illustrative presentation of the FBME series, based on the official FBME 6/3 photograph.
FBME · multistage centrifugal

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Horizontal multistage FBME pump

FBME is a horizontal centrifugal pump for clean or turbid liquids. Its assembly is selected for the flow and head required by your installation.

Series flow rate
400 m³/h
Total head
300 m
Temperature
140 °C
Discharge
DN 80–150

General series limits, not simultaneous ratings. Flow, head and speed depend on the selected curve and number of stages; temperature depends on sealing and cooling.

Limits by size and sealing

FB Bombas Engineering defines FBME speed, sealing and cooling conditions (MTEC-08/01).

Speed
The series limit is 3,500 rpm. At this speed, the quick selection chart (p. 3) shows only the 3″ size, from 3/1 to 3/3; Table 1, without a cooling chamber, allows up to 4 stages for the 3″ and up to 3 for the 4″.
Uncooled packing
−10 to +105 °C.
Cooled packing
+105 to +140 °C.
Mechanical seal
Single seal without cooling: up to approximately 105 °C, depending on the seal manufacturer (Figure 3, p. 10). Maximum +140 °C in Table 1.

Check the configuration and the curve for the selected size and speed before specifying the pump.

Source: MTEC-08/01, pp. 1, 3, 4 (Table 1) and 10 (Portuguese PDF, p. 4, 816 KB)

Send the FBME duty point
Source: MTEC-08/01 · p. 1

Sizes and curves of the FBME series

Compare connections and open the original technical sheet. Pump size and number of stages are separate selection parameters.

FBME 4/3 denotes a nominal 4-inch discharge and three stages. The four sizes below are documented; the number of stages is selected for the required duty point.

Source: MTEC-08/01 · p. 12

Open the original sheet to check impeller diameter, flow, head and test conditions. Sheet conventions differ: confirm power units and whether head refers to one stage or the assembly before sizing. The curves are at 1,750 and 3,500 rpm for 60 Hz (MTEC-08/01). On a 50 Hz supply the motor runs slower: by the affinity rules, flow varies with speed (Q ∝ n), head with its square (H ∝ n²) and power with its cube (P ∝ n³), and the selection is confirmed on the curve and in the proposal.

Original documents in Portuguese.

Choose a size to see its curves and adjacent discharge sizes. This compares connections; hydraulic equivalence depends on the curve.

4 sizes shown

Stages, impellers and diffusers

Stage casings, impellers and diffusers make up the assembly. Sealing and operating conditions must match the liquid and the installation.

Actual FBME 6/3: horizontal three-stage assembly with blue paint and external tie rods.
Actual FBME 6/3 photograph. The supplied configuration depends on the project.

Axially assembled stage casings are held together by external tie rods and flat gaskets. Closed radial single-suction impellers work with diffusers. Configurations include packing or mechanical seals, with grease- or oil-lubricated bearings.

Source: MTEC-08/01 · p. 5

Applications listed for the series

FBME handles clean or turbid liquids in the chemical, petrochemical, pulp and paper, steel, mining, food, textile and pharmaceutical industries and in sanitation (MTEC-08/01). Contact FB before selecting a pump for suspended solids.

Source: MTEC-08/01 · p. 1

Manuals and catalog for FBME

Access the FBME technical manual, catalog and service instructions. Every document retains its original reference.

MTEC-08/01Technical manual · 13 pagesPDF · PT
CTEC-08/01Technical catalog · 9 pagesPDF · PT
MSERV-08/01Service manual · 31 pagesPDF · PT

Original documents in Portuguese. MTEC-08/01, edition dated December 2011. PDFs preserve the original documents; confirm current configuration and drawings with engineering.

View technical manual
Conditions that affect selection
  • Maximum suction pressure: 10 bar. Maximum discharge pressure at zero flow: 30 bar. These limits do not replace the selected total head.
  • Uncooled packing: −10 to 105 °C. Cooled packing: 105 to 140 °C. Single mechanical seal without cooling: up to approximately 105 °C, depending on the seal manufacturer (manual Figure 3); Table 1 refers to the seal manufacturer, with a 140 °C maximum.
  • Specified minimum flow: 0.2 × optimum Q. The maximum operating range must follow the selected curve.
Source: MTEC-08/01 · p. 4

Questions about FBME.

Answers to help you understand the series and prepare a selection with engineering.

What is a multistage centrifugal pump?

It is a centrifugal pump in which the liquid flows through several impellers in series. Pressure rises at each stage, which is why a multistage design serves systems that require high total head. In FBME, radial impellers and diffusers form a horizontal assembly from 3″ to 6″, with up to 300 m of head, a limit not simultaneous with maximum flow; it is FB's option above FBCN's 135 m.

Source: Hydraulic Institute
What does the FBME 4/3 designation mean?

FBME 4/3 denotes a nominal 4-inch discharge and three stages. The four sizes below are documented; the number of stages is selected for the required duty point.

Source: MTEC-08/01
Do the flow, head and temperature limits apply simultaneously?

General series limits, not simultaneous ratings. Flow, head and speed depend on the selected curve and number of stages; temperature depends on sealing and cooling.

Source: MTEC-08/01
Can FBME handle suspended solids?

FBME handles clean or turbid liquids in the chemical, petrochemical, pulp and paper, steel, mining, food, textile and pharmaceutical industries and in sanitation (MTEC-08/01). Contact FB before selecting a pump for suspended solids.

Source: MTEC-08/01
What information is needed to select an FBME?

Send the liquid, temperature, required flow, total head, suction conditions and operating schedule. For a replacement, include the nameplate and photos of the installed pump. The proposal identifies the curve, stages, sealing, materials and drive selected for the submitted duty point.

View technical manual

Provide flow and head to determine the stages

Send the liquid, temperature, required flow, total head, suction conditions and operating schedule. For a replacement, include the nameplate and photos of the installed pump.

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The proposal identifies the curve, stages, sealing, materials and drive selected for the submitted duty point.

To start the selection

  • Liquid, temperature and suspended solids
  • Flow, head and suction conditions
  • Operating schedule and drive
  • Nameplate and photos for replacements

Browse the complete catalog or the FBCN centrifugal series to evaluate a different construction with engineering.