Self-priming centrifugal electric pumps

Extremely noiseless and reliable the centrifugal multistage self priming electric pumps series STJS have been designed to pump from wells, basins or storage tanks, clean liquids, non-explosive or aggressive for the pump’s materials, without abrasives and suspended solids.

  • Maximum suction up to 5 m
  • Liquid temperature not higher than 35 °C for domestic use (CEI EN 60335-2-41) or 90 °C for other use, while the ambient temperature must not be higher than 40 °C
  • Flow rate up to ~ 5 m3/h
  • Heads up to ~ 45 m.


  • Pump body: Stainless steel AISI 304
  • Motor bracket: Die casting aluminium UNI 5076
  • Diffusers: Techno-polymer
  • Impellers: Stainless steel AISI 304
  • Pump shaft: Stainless steel Aisi 420F
  • Mechanical seal: Carbon-ceramics.


The control motors are asynchronous, squirrel cage-type, closed, with external ventilation.

  • Incorporated motor protection and capacitor always on, for single-phase models.
  • The motor protection for three-phase models must be installed by the customer. Equipment compliant with current standards should be used.
  • Class of insulation F
  • Service S1
  • Degree of protection IP 44
  • Terminal board protection IP 54.