The Ruhrpumpen Type STT is a submersible pump with non-clogging and non-stringing two-channel impeller in pot design for vertical wet-pit or dry-pit installation and universal use, suitable for pumping sewage with coarse solid matter and fibrous content without upstream screen.

  • Vertical submersible.
  • Single Suction.
  • Single Stage.
  • Two channel pot impeller.
  • Bearing bracket.
  • Radially split.
  • Discharge nozzle tangentially.

  • Capacity 230 to 6,800 m³/h (1,000 to 30,000 U.S. gpm).
  • Head 2 to 50 m (6 to 165 ft).
  • Maximum Pressure 7 bar (99 psi).
  • Temperature -10 to 40ºC (14 to 104 ºF).


  • Vertical submersible motor pump in compact design. E-Motor acc. to VDE 0530, protection IP 68, construction V1.
  • Back shroud blades on the impeller serve as axial thrust compensation and protection against intrusion of particles into the area of the shaft seal.

  • Disposal or waste water.
  • Raw sewage.
  • Activated sludge.
  • Mixed water.
  • Fecal Matter.
  • Rain Water.


  • Casing: Cast iron GG-25.
  • Wear Ring: Cast iron GG-25.
  • Impeller: Cast iron GG-25.
  • Shaft sealing: 2 mechanical seals in tandem arrangement.
  • Shaft sleeve: G-X20 Cr14
  • Seal cover: Steel.
  • Pump shaft: Steel C 45.
  • Motor shaft: Steel C 45.

  • STT

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