Rotex

Summary

Product Identification

The KSB Rotex is a type series of centrifugal, single-stage pumps designed for handling grey water and condensate.

Available sizes include Rotex 10, Rotex 20, and Rotex 70.

Main Applications

• Disposal
• Heating systems
• Drainage systems
• Draining of pits, shafts, etc.

Feed Water

The Rotex pump series is suitable for handling:

• Grey water
• Heating water
• Condensate (Note: Rotex size 70 cannot be used for condensate)
• River water, lake water and groundwater

Operating Limits

• Flow rate Q: ≤ 24 m³/h (≤ 6.67 l/s)
• Head H: ≤ 14 m
• Fluid temperature T:
  • Rotex 10, 20: ≤ +90 °C
  • Rotex 70: ≤ +70 °C
• Minimum water level (stop level):
  • Rotex 10, 20: 150 mm (400 mm if handling condensate)
  • Rotex 70: 100 mm
• Maximum water level (start-up level):
  • Rotex .../170: ≥ 1000 mm

Mechanical / Hydraulic

• Design:
  • Centrifugal pump, single-stage, to EN 12050-2
  • Pump foot designed as an inlet strainer
  • Discharge to the top, parallel to the pump shaft
  • Pump and motor rigidly connected via a support column
  • Ready to be plugged in, includes a 1.5 m power cable
• Installation: Vertical installation
• Impeller Type & Free Passage:
  • Rotex 10: Two-channel impeller, Free passage = 13 mm
  • Rotex 20: Three-channel impeller, Free passage = 18 mm
  • Rotex 70: Open radial impeller, Free passage = 10 mm
• Bearings:
  • Product-lubricated plain bearing
  • Grease-packed deep groove ball bearings sealed for life
• Automation:
  • Level control for automatic pump start/stop based on fluid level.
  • Rotex 10, 20: Displacement weight with cable pull float switch control
  • Rotex 70: Float switch
• Connections:
  • Rotex 10 and 70 models: Rp 1 1/4
  • Rotex 20 models: Rp 2
• Installation Depth: Available in 100 cm and 170 cm depths. Rotex size 70 is only available up to an installation depth of 100 cm.
• Materials:
  • Discharge casing (Rotex 10, 20): Grey cast iron
  • Volute casing (Rotex 70): Grey cast iron
  • Pump shaft (100 cm installation depth): Steel
  • Pump shaft (170 cm installation depth): Chrome steel
  • Pump foot (Rotex 70): Grey cast iron
  • Impeller (Rotex 10, 20): Grey cast iron
  • Impeller (Rotex 70): Polyamide
  • Bearing housing (Rotex 10, 20): Grey cast iron
  • Bearing bush: Sinter bronze, steel-PTFE / CuSn
  • Pipe: Steel
  • Flange (Rotex 70): Grey cast iron
  • Casing wear ring (Rotex 10, 20): Bronze
• Dimensions: Detailed dimensions are provided in the official PDF, including overall height, width, and specific component measurements.

Electrical

• Drive:
  • Surface-cooled three-phase motor (Enclosure IP55)
  • AC motor (single-phase, Enclosure IP54)
• Power Cable: 1.5 m
• Technical Data (P2, IN):
  • Rotex 10/100 D: 0.55 kW, 3~400 V, 1.35 A
  • Rotex 10/100 E: 0.55 kW, 1~230 V, 3.6 A
  • Rotex 10/170 D: 0.55 kW, 3~400 V, 1.35 A
  • Rotex 10/170 E: 0.55 kW, 1~230 V, 3.6 A
  • Rotex 20/100 D: 0.55 kW, 3~400 V, 1.35 A
  • Rotex 20/170 D: 0.55 kW, 3~400 V, 1.35 A
  • Rotex 70 D: 0.37 kW, 3~400 V, 1.0 A
  • Rotex 70 E: 0.37 kW, 1~230 V, 2.8 A

Product Benefits

• Ready-to-connect, easy installation and commissioning
• Automatic operation by level control with displacement weight or float switch
• Easy to install thanks to low weight, compact design and ready-to-connect system
• Maintenance-free thanks to grease-packed deep groove ball bearings sealed for life and product-lubricated plain bearings

Certifications

• Europe

Accessories

A range of accessories is available, including:

• Pump accessories: RK swing check valves (plastic), swing check valves (gunmetal), socket gate valves, and cover plates.
• Alarm switchgears: AS 0, AS 1, AS 2, AS 4, AS 5 models with various features like circuit breakers, acoustic signalling, volt-free contacts, and self-charging power supply units.
• Alarm equipment for AS 5: Yellow alarm strobe light, plastic housing for strobe light, horn, and alarm combination (yellow lamp and piezo buzzer).
• Control unit/switchgear accessories (for Rotex 70): Float switches with free cable ends in 5 m, 10 m, and 20 m lengths, suitable for fluid temperatures up to 70 °C.

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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