B-Pump

Summary

Product Identification

The KSB B Pump is a vertical turbine pump designed for water supply applications.

Designation Key Example: B10B / 7VN / V1

• B: Type series
• 10: Borehole size in inches
• B: Impeller type (B: nq ≈ 54; D: nq ≈ 74; F: nq ≈ 82)
• 7: Number of stages of the hydraulic system
• VN: Installation type (VN: Vertical, standard, above-floor discharge; VU: Vertical, underfloor discharge)
• V1: Type of drive (Direct drive by vertical electric motor)

Operating Limits

• Flow rate (Q): ≤ 2600 m³/h (≤ 722 l/s)
• Head (H): ≤ 260 m
• Fluid temperature (T): ≤ 105 °C
• Speed (n): 3500 rpm
• Immersion depth (ET): ≤ 120 m
• Borehole diameter (D): 150 to 600 mm (6 to 24 inch)

Fluids Handled

• Water
• Seawater
• Condensate
• Suitable for drinking water in accordance with NSF (not NSF-certified).

Mechanical / Hydraulic

Design Details

• Centrifugal pump, vertical installation.
• Single-stage or multistage.
• Pump shaft, intermediate shaft, and top shaft connected via screwed, conical, or split muff couplings.
• Torque transmission from pump shaft to impeller and couplings via locking sleeves or keys.
• Nominal discharge nozzle diameter: 80 mm - 500 mm.
• Borehole diameter: 6 inches to 24 inches.

Pump Casing

• Radially split relative to the shaft.
• Includes suction casing, discharge casing, and pump bowl.
• Features replaceable casing wear rings.

Impeller Type

• Single-entry mixed flow impeller without hydraulic balancing.
• Optional impeller wear rings.
• Axially locked in position on the shaft via locking sleeves or stage sleeves.

Shaft Seal

• Gland packing
• Mechanical seal

Bearings

• Shaft guide bearings: Product-lubricated plain bearings. Pump shaft supported by bearing bush in each pump bowl. Intermediate shaft supported by bearing spiders in bearing bushes installed between column pipes. Models with shaft enclosing tube have column pipe bearings lubricated by external fluid (water/oil).
• Thrust bearings: Grease-lubricated rolling element bearings, angular contact ball bearings in back-to-back arrangement, uncooled.

Installation Types

• Wet installation: Pump fully submerged, or submerged at least up to the first-stage impeller for commissioning. Minimum submergence of first-stage impeller must equal dimension B (minimum water level above the bottom edge of the suction casing). If equipped with a suction pipe and strainer, minimum liquid level must be 1.0 × nominal diameter of suction casing above top edge of suction strainer to avoid air intake.
• Dry installation: Pump not submerged. Fluid supplied to first-stage impeller through a suction/inlet line. Inlet line connected to suction casing via a special duckfoot bend to prevent pump from being pulled out of vertical position. Minimum submergence is the same as for wet installation.

Materials Available material variants for pump parts include:

• GG: EN-GJL-250 (for casings, pump bowl, impeller, casing wear ring), G CuSn10-C (for suction/discharge casing, pump bowl, impeller, casing wear ring, bearing sleeve).
• GB: 1.4021 (for pump shaft, coupling), 1.4408 (for suction/discharge casing, pump bowl, impeller, casing wear ring), G-CuSn10-C (for bearing sleeve).
• SS: 1.4401 / AISI 316 (for pump shaft, coupling), 1.4408 (for suction/discharge casing, pump bowl, impeller, casing wear ring), Rubber (for bearing sleeve, bearing bush).
• BZ: 1.4401 / AISI 316 (for pump shaft, coupling), G-CuSn10-C (for suction/discharge casing, pump bowl, impeller, casing wear ring, bearing sleeve).
• Duplex stainless steel: 1.4517 (for suction/discharge casing, pump bowl, impeller, casing wear ring), 1.4462 (for pump shaft, coupling, fasteners).
• Super duplex stainless steel: 1.4469 (for suction/discharge casing, pump bowl, impeller, casing wear ring, bearing spider), 1.4410 (for pump shaft, coupling, intermediate shaft, top shaft, conical coupling, screwed coupling, fasteners).

Available material variants for column pipe sets include:

• Steel: C45 (for intermediate shaft, top shaft, conical coupling, screwed coupling), EN-GJL-250 (for bearing spider), A2 (for fasteners).
• Stainless steel: 1.4021 (for intermediate shaft, top shaft, shaft protecting sleeve, conical coupling, screwed coupling), EN-GJL-250 (for bearing spider), G-CuSn10-C (for grease-lubricated bearing bush), Stainless steel, rubber-lined (for product-lubricated bearing bush), A4 (for fasteners).
• Stainless steel: 1.4401 (for intermediate shaft, top shaft, conical coupling, screwed coupling), G-CuSn10-C (for bearing spider, grease-lubricated bearing bush), 1.4401 / AISI 316 (for shaft protecting sleeve), Thordon / Vesconite (for product-lubricated bearing bush), A4 (for fasteners).
• Stainless steel: 1.4462 (for intermediate shaft, top shaft, conical coupling, screwed coupling, fasteners), 1.4517 (for bearing spider), 1.4462 (for shaft protecting sleeve), Thordon / Vesconite (for product-lubricated bearing bush), G-CuSn10-C (for grease-lubricated bearing bush).
• Super duplex stainless steel: 1.4469 (for intermediate shaft, top shaft, bearing spider, fasteners), 1.4410 (for shaft protecting sleeve, conical coupling, screwed coupling), Thordon / Vesconite (for product-lubricated bearing bush), G-CuSn10-C (for grease-lubricated bearing bush).

Product Benefits

• Available with both above-floor discharge and underfloor discharge.
• Available with or without shaft enclosing tube.
• Shaft sealed by gland packing or mechanical seal.
• Available with bearings cooled by the fluid handled.
• Drive options: V1/VHS motor, gear unit, belt drive, diesel engine.
• Various material variants available.
• Available for angled installation.
• Suitable for drinking water in accordance with NSF (not NSF-certified).

Acceptance Inspections / Tests

• Hydrostatic test: Test pressure is normally 1.5 times the operating pressure, carried out using cold water.
• Test standards: Can be performed in accordance with ISO 9906 Class 2B (standard).

Dimensions and Weights

Detailed tables for pump dimensions (max. number of stages, stage length, max. length, diameters, submergence, clearance), discharge nozzle dimensions, and weights for bowl assembly, column pipe sets, discharge heads, and pump rotors are available.

See the official PDF for exact tabulated values.

Selection Charts and Characteristic Curves

The document includes selection charts and characteristic curves (H-Q, P-Q, NPSH₃-Q, and efficiency) for various pump sizes (B6 to B24) and impeller types (B, D, F) at different speeds (2900 rpm, 1450 rpm, 980 rpm).

See the official PDF for detailed charts and curves.

Spare Parts Stock

Recommended spare parts stock for 2 years' operation to DIN 24296 is provided, listing part numbers, descriptions, and recommended quantities.

See the official PDF for the complete list of recommended spare parts.

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Disclaimer: This summary is based on the extracted text and may not include all figures, footnotes, or the latest revisions from the complete OEM PDF datasheet. Contractual data must always match the specific OEM PDF revision used on the project.

Official datasheet (PDF)

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