4BHS2 / 4BHS4 / 4BHS7 / 4BHS15

Summary

Product identification

The Ebara 4BHS Series comprises submersible multistage pumps, including models 4BHS2, 4BHS4, 4BHS7, and 4BHS15, designed for 50Hz operation. They are available with either submersible oil-filled (type OY) or water-filled (type WY) motors.

The pump type key is structured as follows:

• 4: Indicates 4" dimension for deep wells.
• BHS: Represents the model series.
• [X]: Denotes m³/h at maximum efficiency.
• [Y]: Indicates the number of impellers.
• [Motor Type]: O for Oil filled motor, W for Water filled motor.
• M: Signifies a single-phase motor.

Operating limits

• Maximum liquid temperature: 30 °C
• Maximum immersion depth: 150 m
• Maximum ambient temperature: 30 °C
• Maximum starts per hour: 350
• 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.
• Protection degree:
  • Oil filled motor: IP 58
  • Water filled motor: IP68

Feed water

• Liquid handled: Clean water
• Maximum sand content: 50 parts per million
• Maximum chlorine ion density: 500 parts per million
• Sealing liquid: Propylene Glycol 50% water solution

Electrical

• Frequency: 50 Hz
• Rated speed: Approximately 2850 min⁻¹ (2 poles).
• Power rating:
  • Single phase: 0.55–2.2 kW (0.75–3.0 HP)
  • Three phase: 0.55–5.5 kW (0.75–7.5 HP)
• Voltage:
  • Single phase (oil-filled motor): 230 ±10% V
  • Three phase (oil-filled motor): 380-415 ±10% V
  • Single phase (water-filled motor): 230 -10%+6% V
  • Three phase (water-filled motor): 380-415 -10%+6% V
• Start type: Direct on line
• Capacitor for start and run:
  • Single phase motors: Fitted in starter box
  • Three phase motors: Provided by the user
• Insulation class:
  • Oil filled motor: F
  • Water filled motor: B
• Power cable (EPDM/Cross Sealed Polyethylene):
  • 4x1.5 mm² for L=1.75 m (up to 2.2 kW)
  • L=2.5 m (for 3 and 4 kW)
  • L=4 m (for 5.5 kW)
• Motor Data: Detailed tables for oil-filled and water-filled motors provide input power, nominal current (IN), starting current (IA), power factor, and high thrust values for various kW/HP ratings and voltages. See the official PDF for exact tabulated values.
• Cable Selection: Tables provide maximum cable lengths for different cable types (e.g., 4x1, 4x1.5, 4x2.5 mm²) with a 3% voltage drop at 30°C ambient temperature. The permissible maximum length (Lmax) for an operating voltage (Ui) different from the nominal voltage (Un) can be calculated using the formula: Lmax = Ltab (Ui / Un)².

Mechanical / Hydraulic

• Construction type: Closed centrifugal
• Pipe connection (UNI ISO 228):
  • G1 1/4 for 4BHS2 models
  • G1 1/2 for 4BHS4 models
  • G2 for 4BHS7 and 4BHS15 models
• Materials:
  • Suction, Discharge, Intermediate Casing: EN 1.4301 (AISI 304)
  • Impeller: EN 1.4301 (AISI 304)
  • Pump Shaft: EN 1.4401 (AISI 316)
  • Liner Ring: EN 1.4301 (AISI 304) + EPDM
  • "O" Ring: NBR
  • Valve: EN 1.4301 (AISI 304)
  • Valve Seat: EN 1.4301 (AISI 304) + NBR
  • Shaft Sleeve: Tungsten carbide
  • Axial Bearing: Tungsten carbide
  • Radial Bearing: Tungsten carbide
  • Friction Ring: Tungsten carbide
  • Motor Bracket: Brass with nickel plate (oil-filled motor), Brass (water-filled motor)
• Flange mount: NEMA standard
• Performance Curve Specifications:
  • Tolerances according to ISO 9906:2012 - Grade 3B.
  • Measurements were carried out with clean water at 20°C and a kinematic viscosity of ν = 1 mm²/s (1 cSt).
  • A safety margin of at least 0.5 m should be considered during pump selection.
• Minimum Efficiency Index (MEI):
  • 4BHS2: MEI > 0.70 (Impeller diameter = 70.5 mm)
  • 4BHS4: MEI > 0.70 (Impeller diameter = 72 mm)
  • 4BHS7: MEI > 0.50 (Impeller diameter = 74 mm)
  • 4BHS15: Product not available for the European market (Impeller diameter = 72 mm)
• Dimensions and Weights: Extensive tables are provided for pump dimensions (H1, A, H2, H) and packing weights (X, Y, Z, weight) for pumps without motors, and with single-phase and three-phase oil-filled or water-filled motors. See the official PDF for exact tabulated values.

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Disclaimer: This summary is based solely on the provided text extract. It may not include all figures, footnotes, or the latest revisions present in the complete OEM PDF datasheet. Contractual data must always match the specific OEM PDF revision used on the project.

Official datasheet (PDF)

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