Multitec E/F/V ro

Summary

Product identification

The KSB Multitec / Multitec-RO is a series of high-pressure ring-section centrifugal pumps.

Key features include:

• Multistage centrifugal pump in ring-section design.
• Available in horizontal (long-coupled or close-coupled) or vertical (close-coupled or with universal joint shaft) installation.
• Pump casing options: axial or radial suction casing; radial suction and discharge casings with nozzles turnable in 90° steps.
• Flanges to EN and ASME standards.
• Identical seal housing for gland packing and mechanical seal.
• Stage casings, discharge casings, and seal housing sealed by confined O-rings.
• Impeller type: Closed radial impeller with multiply curved vanes.
• Bearings: Fixed bearing (drive end, rolling element), Radial bearing (non-drive end, plain or rolling element, depending on installation). Lubrication can be grease, oil, or by fluid handled.
• Coupling: Flexible (long-coupled) or rigid/flexible (close-coupled, depending on DN size).
• Shaft seal options: Uncooled gland packing (with or without barrier fluid), standardised mechanical seal to EN 12756, or cartridge seal.

Main applications

• Water supply systems
• 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
• Boiler feed water
• High-temperature hot water
• Condensate
• Fire-fighting water
• Solvents
• Lubricants
• Fuels
• Cooling water
• Water/oil emulsions
• Seawater
• Thermal water

Operating limits

• Size (DN): 32 – 250
• Flow rate (Q):
  • ≤ 1500 m³/h
  • ≤ 417 l/s
• Head (H): ≤ 1000 m (only for individual sizes/designs)
• Fluid temperature (T):
  • ≥ -10 °C
  • ≤ +200 °C (only for individual sizes/designs)
  • Multitec-RO: -10 °C to +45 °C
  • Multitec: -10 °C to +200 °C
  • For installation types E/F/V: -10 °C to +140 °C
• Operating pressure (p₂): ≤ 100 bar (the sum of inlet pressure and shut-off head must not exceed the value indicated, only for individual sizes/designs)
  • For installation types E/F: ≤ 40 bar or ≤ 63 bar/100 bar (only available for selected sizes)

Pressure and Temperature Limits by Material: The PDF provides detailed pressure-temperature curves for various materials (e.g., JL1040, GP240GH+N, 1.4408, 1.4317, 1.4517, 1.4469) and flange standards (EN1092, ASME). See the official PDF for exact tabulated values and curves.

Electrical

• Drive: 50 Hz and 60 Hz electric motors, diesel engines, or turbines.
• Motor Construction Types (Three-phase current squirrel-cage motor):
  • Installation types A / B / C / D: IMB3
  • Installation types E / F: IMV1 up to 45 kW, for higher ratings IMB35
  • Installation type V: IMV1
• Enclosure: IP55 / IP23
• Thermal class: F
• Pump 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, motor standstill heater.

Noise characteristics

Surface sound pressure level LₚA measured at 1 m from the pump outline (as per DIN 45635 Parts 1 and 24).

• Increase for 60 Hz operation: 3500 rpm +3 dB, 1750 rpm +1 dB. See the official PDF for exact tabulated values for pump and pump with electric motor at 1450 rpm and 2900 rpm across various rated power inputs (Pₙ) from 2.2 kW to 1400 kW.

Mechanical / hydraulic

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.
• Plain bearing: SiC/SiC.
• Shaft: C45+N, 1.4021+QT, 1.4462, 1.4501.
• Shaft sleeve (mechanical seal): 1.4057+QT800, 1.4571, 1.4462, 1.4501.
• Shaft protecting sleeve (gland packing): 1.4122.
• Balance drum: 1.4021, 1.4404, 1.4462, 1.4501. See the official PDF for detailed material codes for specific components (e.g., suction casing, impeller, wear rings) across various pump variants.

Shaft seals

• Mechanical Seal:
  • Available versions: Balanced or unbalanced, uncooled (up to 140 °C) or cooled (up to 200 °C), single or double, cartridge mechanical seal.
  • Material codes for mechanical seal components (e.g., Carbon graphite, Silicon carbide, Tungsten carbide, EPDM rubber, Fluoroelastomer, Hastelloy, CrNiMo steel). See the official PDF for detailed seal codes, material combinations, and pressure/temperature limits for specific mechanical seal configurations.
• Gland Packing:
  • Available versions: Uncooled up to 140 °C.
  • Material: PTFE-impregnated polyacryl.
  • Static sealing elements: FPM or EPDM.
  • Maximum pressure (Pmax): 25 bar.
  • Gland packing versions: Without lantern ring (for suction head operation Pₛ absolute ≥ 1 bar) or with 1 or 2 lantern rings (for Pₛ absolute < 1 bar with clean liquid from an external source).

Technical data (per size)

• Shaft diameter at coupling: 22 mm (DN 32) to 72 mm (DN 250).
• Bearing types: Rolling element bearings (e.g., 6309 ZZ C3-HT, 7309 BUA, 7312 BUA, 7315 BUA, 7318 BUA, 6312C3, 6315C3, 6318C3) and SiC plain bearings.
• Gland packing dimensions: Packing ring dimensions (e.g., 10 × 10 mm, 12 × 12 mm, 16 × 16 mm), Lantern ring width (20 mm, 25 mm, 32 mm), Number of packing rings (5 or 6).
• Shaft protecting sleeve diameters: For single mechanical seal (e.g., 35/38 Ø, 40 Ø, 50 Ø, 60 Ø, 70 Ø, 85 Ø).
• Maximum impeller diameter: (e.g., 142 mm, 170/173 mm, 193/214 mm, 241/245 mm, 301/273 mm, 305/270 mm, 378/342 mm, 382/337 mm, 418/387 mm, 426/390 mm, 477/431 mm).
• Spacer length of spacer-type couplings: 140 mm, 180 mm, 200 mm, 250 mm. See the official PDF for exact tabulated values for each pump size (DN 32 to DN 250) and shaft material.

Dimensions The PDF contains detailed dimension drawings and tables for Multitec A/B/C/D and Multitec E/F installation types, covering various stages and material codes. See the official PDF for exact tabulated dimensions and connection details (e.g., G = ISO 228/1, Rp = ISO 7/1) for all pump sizes and configurations.

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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. For contractual data, always refer to the official OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror