Stream - Industrial Fire-fighting Pumps - SEN40-250


SEN series close coupled centrifugal pumps are with single impeller, which manufactured according to European standards EN733; SEN series are very extended: the different performances curves allow a right choice of the optimal model following all kinds of specific demands in several fields as: watersupply for living uses; industrial uses and general water plants projects; water supply;spray irrigations and watering, pressure sets, heating and air-conditioning plants, any other use for liquid decanting.

The pumps must be installed in enclosed places, or at least protected against inclement weather.

Pump Specifications

  • Discharge flange diameter: DN32 – DN80 mm
  • Capacity Q range:  4.5m3/h - 240m3/h (50HZ)
  • Head H range:  10m – 92.5m
  • Operating speed:  2900RPM (50Hz)

On request:

  • Other operating voltages and frequencies
  • Special mechanical seal; special liquids
  • Special temperature

Operation Conditions

  • Working Temperature Range:  -10? ~ +90?
  • Max. Allowable Working Pressure(MAWP):  10bar 
  • Hydrostatic Test Pressure = 1.3 times the maximum discharge pressure, but not exceed 13 bar)

Motor Specifications

Totally Enclosed Fan Cooled a synchronous induction motor


3 Phase 2 - 4 HP 220-240VD / 380-420VY - 50 HZ
3 Phase 5.5 - 50 HP 380-420VD / 660-725VY - 50 HZ
2 Phase 2 - 5.5 HP

  • Degree of motor protection: IP55(IEC60034-5)
  • Insulation Class: F
  • Duty: S1 continuous duty operation
  • Altitude shall not exceed 1000m above seal-level (IEC60034-1)
  • Allowed air temperature between -20? and 40?(IEC60034-1)

On request:

Motor winding is protected with 3 PTCthermistors for tripping.

Construction Features

  • Main dimensions:  Apply to EN733 (DIN24255) standard and backpull out type
  • Casing structure:  End suction, center radial discharge
  • Flange pressure rate: ISO7005.2 PN1.6MPa
  • Shaft seal: Single mechanical seal(Graphite / Silicon carbide / Ceramic / NBR / FPM / SS304 / SS316) According to Standard EN 12756
  • Driven shaft: Pump and motor flanged together to form a close-coupled unit, with common shaft.


  • Advanced high efficiency design
  • Reliability
  • Distinguished heat dissipation
  • Silence running
  • Compact structure

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