KSB Amarex N Submersible Motor Pump

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Amarex N (Type Series Booklet)

  • Waste Water, Submersible Motor Pump
  • 50Hz, DN 50 DN 100

Main applications

  • Waste water management
  • Drainage systems
  • Sewage treatment plants
  • Sludge disposal
  • Drainage of rooms and areas at risk of flooding on municipal, commercial and industrial premises

Fluids handled

  • Service water
  • Grey water
  • Waste water with faeces
  • Waste water containing long fibres and solid substances
  • Fluids containing gas
  • Activated sludge
  • Digested sludge
  • Raw sludge

Operating data

  • Operating properties
  • Characteristic Value
  • Flow rate Q Up to 190 m3/h (53 l/s)
  • Head H Up to 49 m
  • Fluid temperature t Up to +40 °C
  • Motor rating P2 0.8 kW to 4.2 kW
  • Enclosure IP 68 to EN 60529 / IEC 529


  • Example : Amarex N F 80-220 / 04 4 YL G-220
  • Key to the designation
  • Pump type : Amarex N
  • Impeller type (S, F, D ) : F (Free Flow Impeller)
  • Size of Hydraulic System : 80-220
  • Motor size : 04
  • Number of motor poles : 4
  • Motor version (UL, YL, WL) : YL (with explotion protection, for fluid temperatures of up to 40°)
  • Material variant (G, G1, G2, GH) : G (Pump Casing, Intermediate Casing, Impeller : Grey Cast Iron JL 1040)


Three-phase asynchronous squirrel-cage motor Explosion-proof pump sets comply with Ex dc IIB type of Protection

Product benefits

  • Easy and fast installation/removal with polarised, absolutely watertight cable and KSB plug connection ensuring correct installation.
  • Motor absolutely watertight, also in the event of damage to the cable sheath, with individually stripped, tinned and resin-sealed conductors
  • Highest operating reliability with optimum motor selection for operating mode S1, thermal class F, explosion-proof variant in Ex d IIB T4 Gb
  • Long service life with shaft made of corrosion-resistant stainless steel
  • Zero maintenance, ideal for continuous duty, with longlife bearings sealed on both sides, grease-packed for life
  • Environmentally friendly, non-toxic, food-approved oil
  • Significant reduction of energy costs by optimised hydraulic system and high efficiency
  • Absolutely reliable and non-clogging design with optimised cutter (S impeller).
  • No risk of leakage with close-coupled pump design
  • Stationary pump sets easy to install and remove with automatic, bolt-free connection; leakage prevented by elastic sealing elements
  • Ease of service with wetted bolts made of stainless steel, which are easy to undo even after years of operation
  • Two bi-directional mechanical seals with oil reservoir filled with ecologically acceptable oil provide double safety
  • Well suited for mechanical seal with covered spring for abrasive and aggressive fluids
  • Only one set of spare parts for all pump sizes thanks to modular system

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