Self-priming centrifugal electric pumps

Self-priming electric pumps 2 impeller
The self-priming centrifugal electric pumps series STJ have been designed to pump clean water from wells, even if mixed with gas

  • Maximum suction up to 8-9 m
  • Liquid temperature not higher than 35 °C for domestic use (CEI EN 60335-2-41) or 60 °C for other use, while the ambient temperature must not be higher than 40 °C
  • Flow rate up to ~ 9 m3/h
  • Heads up to ~ 60 m


  • Pump body : cast iron G20 with anti-corrosive coating
  • Motor bracket : cast iron G20 with anti-corrosive coating
  • Diffusers, Nozzle & Venturi tube : techno-polymer
  • Impeller : techno-polymer (stamped brass UNI-EN 12165 available on demand)
  • Pump shaft : stainless steel AISI 304
  • 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.