Self-priming centrifugal electric pumps

The self-priming centrifugal electric pumps series STJC-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 ~ 4 m3/h
  • Heads up to ~ 55 m


  • Pump body : cast iron G20 with anti-corrosive coating
  • Motor bracket : die casting aluminium UNI 5076
  • Diffuser, Nozzle & Venturi tube : techno-polymer
  • Impeller : techno-polymer
  • 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