4WN1 / 4WN2 / 4WN3 / 4WN4 / 4WN5 / 4WN6 / 4WN8 / 4WN10 / 4WN12 / 4WN15

Summary

Product identification

The EBARA 4WN series consists of submersible multistage pumps, designed for 50Hz operation.

The product line includes the following models:

• 4WN1
• 4WN2
• 4WN3
• 4WN4
• 4WN5
• 4WN6
• 4WN8
• 4WN10
• 4WN12
• 4WN15

Operating limits

• Type of liquid: Clean water
• Liquid Temperature: Maximum 35 °C (depends on maximum motor temperature)
• Sand content: Maximum 50 g/m³
• Chlorine ion density: Maximum 500 parts per million
• Maximum immersion: 35 m
• Starts / hours: 30
• Minimum flow rate: Pumps should not be used at a flow rate below 10% of the best efficiency point to avoid the risk of overheating.

Mechanical / hydraulic

• Pump Type: Submersible multistage, closed centrifugal - floating type
• Bearing: Sleeve type - Sintered (AISI304) / Urethane
• Pipe connection:
  • RP1 1/4 (models 4WN1 to 4WN4) UNI ISO 7/1
  • RP1 1/2 (models 4WN5) UNI ISO 7/1
  • RP2 (models 4WN6 to 4WN15) UNI ISO 7/1
• Flange mount: NEMA standard 4” motor
• Applicable standard of test: ISO 9906 - Annex A
• Motor Type: Submersible water filled (type WF) or Submersible oil filled (type OF)
• Sealing liquid (Oil filled motor): Marcol 82 (Esso)
• Sealing liquid (Water filled motor): Propylene Glycol - water solution
• Start type: Direct on line
• Rated speed: Refer to each characteristic performance as rated speed (Performance curves indicate ≈ 2850 min⁻¹)

Electrical

• Frequency: 50 Hz
• Voltage:
  • Single phase: 230(+6-10%) V
  • Three phase: 400(+6-10%) V
  • Single phase (oil filled): 230(±6%) V
  • Three phase (oil filled): 400(±6%) V
• Power rating:
  • Single phase: 0.37÷3.7 kW (0.5÷5 HP)
  • Three phase: 0.37÷7.5 kW (0.5÷10 HP)
• Insulation class: F
• Protection degree:
  • IP 58 (Water filled)
  • IP 68 (Oil filled)
• Over load protection:
  • Fitted in starter box (Single phase)
  • Provided by the user (Three phase)
• Capacitor for start and run:
  • Fitted in starter box (Single phase)
  • Provided by the user (Three phase)
• Number of Poles: 2
• Power cable:
  • Size: 4x1.5 mm²
  • Length: L=1.75 m (up to 2.2 kW) / L=2.5 m (for 3 and 4 kW) / L=4 m (for 5.5 and 7.5 kW)

Materials of construction

• Impeller: PPO mod. + Glass Fibre reinforced
• Intermediate casing: EN 1.4301 (AISI 304)
• Diffuser: Polycarbonate Glass Fibre reinforced
• Discharge: EN 1.4301 (AISI 304)
• Coupling: Sintered type (AISI304)
• Shaft: EN 1.4301 (AISI 304)
• Valve: EN 1.4301 (AISI 304)
• Discharge Head: EN 1.4308 (ASTM CF8)
• Motor casing material: EN 1.4301 (AISI 304)
• Motor bracket material: Cast iron G20, Cast iron nickel plated
• O-Ring: NBR
• Bearing (pump): Polyacetal
• Check Valve Cone: AISI 304 SS
• Check Valve retaining ring: AISI 304 SS
• Bearing Spider: Glass Filled Polycarbonate
• Bowl: AISI 304 SS
• Strainer: AISI 304 SS
• Pump Shaft/Coupling: AISI 304 SS
• Shaft Sleeve: AISI 304 SS or Noryl
• Pump casing: AISI 304 SS
• Cable Guard: AISI 304 SS

Performance

Performance curves and selection charts are provided for the 4WN series.

• Tolerances: According to ISO 9906 Annex A.
• Test conditions: Clean water at 20 °C with a kinematic viscosity of ν = 1 mm²/s (1 cSt).
• Working range: Continuous curves indicate the recommended working range; dotted curves are for guidance only.
• Minimum Efficiency Index (MEI):
  • 4WN1, 4WN2, 4WN3, 4WN4: MEI > 0.70
  • 4WN5: MEI > 0.60
  • 4WN6, 4WN8, 4WN10, 4WN12, 4WN15: MEI > 0.10 (Note: Models 4WN6, 4WN8, 4WN10, 4WN12, 4WN15 are noted as "PRODUCT NOT AVAILABLE FOR THE EUROPEAN MARKET")
• Symbols: Q = volume flow rate, H = total head, P₂ = pump power input (shaft power), η = pump efficiency, NPSH = net positive suction head required by the pump, MEI = minimum efficiency index.

See the official PDF for exact tabulated values in the selection charts and detailed performance curves for each model.

Dimensions and Weight

The document provides detailed tables for pump dimensions (H1, DNM, H for oil and water motor versions) and weights (pump only, pump + oil motor, pump + water motor) for all models and power ratings.

See the official PDF for exact tabulated values.

Packing

Packing dimensions (X, Y, Z) and weights are provided for all models and power ratings.

See the official PDF for exact tabulated values.

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Disclaimer: This summary is based on extracted text and may not include all figures, footnotes, or the latest revisions from the complete OEM PDF datasheet. Contractual data must always match the specific OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror