Multitec

Summary

Product identification

The KSB Multitec and Multitec-RO are high-pressure, multistage centrifugal pumps in a ring-section design.

Main applications:

• Water supply, drinking water supply, pressure boosting
• General irrigation systems
• Fossil-fuelled power stations, hot-water supply, condensate transport, boiler feed applications, heating systems
• Filtering systems, fire-fighting systems, snow-making systems, washing plants
• Industrial plants, desalination plants, geothermal plants, heat recovery systems

Fluids handled:

• Water, drinking water, feed water, hot water, condensate, fire-fighting water
• Solvents, lubricants, fuels, cooling water, water/oil emulsions
• Seawater, thermal water

Operating limits

• Sizes (DN): 32 - 200
• Flow rates (Q): ≤ 850 m³/h (≤ 236 l/s)
• Heads (H): ≤ 630 m (up to 1000 m for individual sizes/designs)
• Fluid temperature (T): -10 to +200 °C (Multitec-RO up to 45 °C)
• Operating pressures (p₂): ≤ 63 bar (up to 100 bar for individual sizes/designs). The sum of inlet pressure and shut-off head must not exceed the indicated value.

Pressure and temperature limits by material: The datasheet provides detailed pressure-temperature curves for various materials, including:

• JL1040 (GJL-250), EN-GJS 400-15 (up to 60 °C fluid temperature for GJS 400-15)
• GP240GH+N (1.0619+N)
• 1.4408
• 1.4317, 1.4517, 1.4469 See the official PDF for exact tabulated values and curves.

Noise characteristics: Surface sound pressure levels (LpA) are provided for the pump alone and the pump with an electric motor at 1450 rpm and 2900 rpm across a range of rated power inputs (2.2 kW to 710 kW).

• Measurements are taken at 1 m from the pump outline (as per DIN 45 635 Parts 1 and 24).
• For 60 Hz operation, add +3 dB for 3500 rpm and +1 dB for 1750 rpm. See the official PDF for exact tabulated values.

Electrical

• Drive: 50 Hz and 60 Hz electric motors, diesel engines, or turbines.
• Motor types of construction: IMB3, IMV1, IMB35.
• Enclosure: IP 55/IP 23
• Thermal class: F
• Direction of rotation:
  • Installation types A, B, C, E, F, V: Clockwise (seen from the drive end)
  • Installation type D: Counter-clockwise (seen from the drive end)
• Options: Special voltages, explosion protection, insulated bearing, standstill heater.

Mechanical / hydraulic

Design details:

• Multistage centrifugal pump in ring-section design.
• Horizontal installation in long-coupled or close-coupled design.
• Vertical installation in close-coupled design or with cardan shaft.
• Pump casing: Axial or radial suction casing. Radial suction and discharge casings have nozzles that can be turned in steps of 90°. Flanges conform to EN and ASME standards.
• Impeller type: Closed radial impeller with multiply curved vanes.
• Bearings:
  • Fixed bearing (drive end): Rolling element bearing.
  • Radial bearing (non-drive end): Plain bearing or rolling element bearing, depending on installation type.
  • Lubrication: Rolling element bearings are grease or oil lubricated; plain bearings are lubricated by the fluid handled.
  • Self-aligning.
• Coupling:
  • Long-coupled designs: Flexible coupling (with or without spacer).
  • Close-coupled designs: Rigid coupling (up to DN 65), flexible coupling without spacer (larger designs).
• Coupling guard: Standard cylindrical, optional tread-proof.
• Shaft seal:
  • Uncooled gland packing (with or without barrier fluid).
  • Standardized mechanical seal to EN 12756 (cooled or uncooled, single or double).
  • Cartridge seal.
• Axial thrust balancing: Primarily by a balance drum; for small numbers of stages, axial thrust is absorbed by the thrust bearing.

Materials:

• Casing: Grey cast iron, nodular cast iron, steel, stainless steel, duplex stainless steel, super duplex stainless steel.
• Hydraulic system: Grey cast iron, bronze, stainless steel, duplex stainless steel, super duplex stainless steel. Detailed material codes for specific components (e.g., suction casing, impeller, shaft, plain bearings, shaft sleeves) are provided in the official PDF for various material variants.

Technical data (selected parameters):

• Shaft diameter at coupling:
  • DN 32: 22 mm
  • DN 50: 28 mm
  • DN 65: 32 mm
  • DN 100: 40 mm
  • DN 125: 50 mm
  • DN 150, DN 200: 60 mm
• Gland packing:
  • Packing ring dimensions: 10 × 10 mm (DN 32-65), 12 × 12 mm (DN 100-125), 16 × 16 mm (DN 150-200).
  • Lantern ring width: 20 mm (DN 32-65), 25 mm (DN 100-125), 32 mm (DN 150-200).
  • Number of packing rings: 5 (DN 32-100), 6 (DN 125-200).
  • Maximum pressure: 25 bar (up to 100 °C or 140 °C depending on material).
• Mechanical seal:
  • Available versions: Balanced and unbalanced; uncooled (up to 140 °C) or cooled (up to 200 °C); single or double; cartridge mechanical seal.
  • Seal face materials: Carbon graphite (antimony- or resin-impregnated), Silicon carbide (solid, sintered without pressure, or shrink-fitted), Tungsten carbide (Ni-bonded or NiCrMo-bonded).
  • Static seal materials: EPDM rubber (peroxide-cured), Fluoroelastomer (e.g., Viton).
  • Maximum pressure: Varies significantly by seal type and supplier, generally up to 40 bar for single and double mechanical seals, and up to 25 bar for cartridge seals. See the official PDF for exact tabulated values of seal codes and their pressure/temperature limits.

Connections:

• Connections are typically G = ISO 228/1 or Rp = ISO 7/1.
• Sizes for connections 1M.1, 1M.2, 6B.1, 6B.2, 6B.3, 8B, 8B.1, 8B.2 vary by pump size (DN) and installation type.

Dimensions: Detailed dimensional drawings and tables (in mm) are provided for Multitec A, B, C, D, E, F, and V installation types, covering various stages and material codes. See the official PDF for exact tabulated values.

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Disclaimer: This summary is based on 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)

Lenntech datasheet mirror