ST Horizontal Single Stage Pump

Two Channel Impeller Centrifugal Pumps

The ST model is a horizontal centrifugal pump with a non-clogging and non-stringing two-channel impeller. It is engineered for dry installation and universal use in the water and wastewater market, suitable for pumping sewage with coarse solid matter and fibrous content without upstream screen. For vertical installation check the STV pump model.

Operation limits

Capacity 400 to 8,500 m³/h (1,750 to 37,500 gpm)
Head 3.5 to 32 m (11.5 to 105 ft)
Maximum Pressure up to 4.5 bar (65 psi)
Temperature -10 to 80 °C (14 to 176 °F)
Discharge flanges sizes 12'' to 28''
Applications Disposal or wastewater, Raw sewage, Activated sludge, Mixed water, Fecal matter, Rain water


  • Horizontal installation
  • Single suction
  • Single stage centrifugal pump
  • Two-channel pot impeller
  • Heavy-duty bearing bracket
  • Radially split
  • Tangential discharge nozzle
  • Bearing bracket for direct drive by electric motor or diesel engine, via flexible coupling or via V-beltdrive
  • ST-bloc horizontal pump in compact design, for direct coupling with electric motor
  • Back shroud blades on the impeller serve as axial thrust compensation and protection against intrusion of particles into the area of the shaft seal
  • Casing: Cast iron GG-25
  • Wear Ring: Cast iron GG-25
  • Impeller: Cast iron GG-25
  • Shaft sealing: PTFE-coated sealing rings with grease lubrication
  • Shaft sleeve: G-X20 Cr14
  • Seal cover: Steel
  • Pump shaft: Steel C 45
  • Motor shaft: Steel C 45