4WNBore well pumps in stainless steel 304

4WN pump sets (hydraulic + motor)

4” borehole pumps in AISI304 with pump and single-phase oil-filled motor factory fitted

– Outer casing made of thick stainless steel, for maximum durability
– Discharge head and motor bracket made of cast stainless steel for maximum stability
– Non-return valve made of stainless steel: prevents any water backflow and reduces pressure surges
– Stage casing, shaft, motor coupling and intake filter made of stainless steel to guarantee a problem-free, long service life and high operating safety
– Floating-mount impellers made of Noryl and polycarbonate glass-fibre reinforced diffusors to guarantee maximum durability and a constant high degree of efficiency
– All materials are in accordance with FDA standards
– Mounting specification according to NEMA standards
– Rewindable 2-pole asynchronous oil-filled motor (single-phase version, external control-box to be supplied separately)
– Motor flange complying with NEMA standards
– Motor of complete stainless steel construction
– Food-safe, environmentally neutral motor coolant (FDA/NSF-tested)
– Sand-guard and oversized mechanical seal
– Piece of blue flat cable included, fitted and ready for heat-shrink cable connection (“food-safe”, WRAS/ACS/KTW tested)

  • Water supply from deep wells, cisterns and tanks
  • Watering and irrigation
  • Pressure boosting and fountains
  • Fire-fighting systems
  • Pumped medium: clean, non corrosive and non-abrasive liquid
  • Maximum permissible sand content: 50 g/m3
  • Immersion depth: max 150 m
  • Maximum pump overall diameter (cable guard included): 98 mm

Discharge sizes
– Models from 4WN1 to 4WN4: Rp 1 ¼”
– Models 4WN5: Rp 1 ½”

Conformity to EuP Regulation 547/2012
All models are characterized by extremely high efficiency levels:
– Models from 4WN1 to 4WN4: MEI > 0,7
– Models 4WN5: MEI > 0,6


– Rewindable 2-poles single-phase oil-filled motor (food-safe coolant, FDA/NSF-tested)
– Voltage supply: 1~220-240V, 50 Hz
– Insulation class: F
– Protection degree: IP68
– Starts per hour: max 30
– Temperature of the water: max 35 °C
– Removable cable plug

EBARA is a trusted brand worldwide with its experience and superior technologies.