3DS / 3M4 / 3S4 / 3P4 / 3LM4 / 3LS4 / 3LP4

Summary

Product Identification

This document describes EBARA CENTRIFUGAL PUMPS from the 3 SERIES, featuring 4 Poles and operating at 50 Hz.

The product line includes models:

• 3M4
• 3S4
• 3P4
• 3LM4
• 3LS4
• 3LP4

Available pump sizes range from 32-125 up to 80-250.

Operating Limits

• Liquid Handled: Clean water and moderately aggressive fluids. Drinking water and water containing glycol are suitable for the E version.
• Liquid Temperature:
  • Minimum: -10 °C (or -20 °C for E version)
  • Maximum: +90 °C (for Q1Q1EGG, Q1U3EGG, Q1AEGG, U3U3EGG, U3CEGG versions)
  • Maximum: +110 °C (for H-HS-HW-HSW versions)
  • Maximum: +120 °C (for E version)
• Maximum Working Pressure: 1 MPa
• Minimum Flow Rate: Pumps should not be used at a flow rate below 10% of the best efficiency point to avoid overheating.

Electrical

• Motor Type: Electric - TEFC, Three Phase
• Efficiency Level (Reg. 640/2009):
  • 3(.)M4: IE2 from 0.75 kW up to 5.5 kW; IE3 only for 7.5 kW.
  • 3(.)S4-3(.)P4: IE3 from 0.75 kW up to 7.5 kW.
• Number of Poles: 4
• Rotation Speed: ≈ 1400 min⁻¹
• Insulation Class: F (class B for temperature rise)
• Protection Degree (CEI EN 60034-5): IP 55
• Power Rating: 0.25 ÷ 7.5 kW (0.33 ÷ 10 HP)
• Frequency: 50 Hz
• Voltage:
  • 230/400 ±10% (up to 4.0 kW)
  • 400/690 ±10% (5.5 kW and above)
• Overload Protection: Provided by the user
• Casing Material: Aluminium
• Motor Support: Cast iron - Aluminium
• Dimensions of Cable Entry: PG11, PG13.5, PG16, PG21, M20x1.5, M25x1.5, M32x1.5
• Flange Mount (IEC motor):
  • IM B5 (up to 1.5 kW)
  • IM B35 (2.2 kW and above)
  • IM B3

Mechanical / Hydraulic

• Construction:
  • Impeller:
    • Closed centrifugal type for 32, 40, 50 versions.
    • Reinforced laser welding for 40-200/1.5, 50-200/2.2.
    • Closed centrifugal three dimensional blades for 65 and 80 versions.
  • Shaft Seal Type: Mechanical seal; Mechanical seal with stationary ring secured against rotation.
  • Bearing: Bearing with contact seal.
• Pipe Connection (Flange according to DIN 2532 Standard):
  • Suction:
    • DN50 for 32-125/160/200
    • DN65 for 40-125/160/200, 50-125/160/200
    • DN80 for 65-125/160/200/250
    • DN100 for 80-160/200/250
  • Discharge:
    • DN32 for 32-125/160/200
    • DN40 for 40-125/160/200
    • DN50 for 50-125/160/200
    • DN65 for 65-125/160/200/250
    • DN80 for 80-160/200/250
• Material:
  • Casing:
    • EN 1.4301 (AISI 304) or EN 1.4404 (AISI 316L) for 32, 40, 50, 65-125/160/200.
    • EN 1.4401 (AISI 316) made by precision casting for 65-250, 80-160/200/250.
  • Impeller:
    • EN 1.4301 (AISI 304) or EN 1.4404 (AISI 316L) for 32, 40, 50, 65-125/160/200.
    • EN 1.4401 (AISI 316) made by precision casting for 65-250, 80-160/200/250.
  • Casing Cover:
    • EN 1.4301 (AISI 304) or EN 1.4404 (AISI 316L) for 32, 40, 50, 65-125/160/200.
    • EN 1.4401 (AISI 316) made by precision casting for 65-250, 80-160/200/250.
  • Mechanical Seal:
    • Standard: Ceramic/Carbon/NBR
    • L version: SiC/SiC/FPM
    • Other special versions are available; see the official PDF pages 321-325 for details.
  • O-ring: NBR or FPM. EPDM for E version, Q1AEGG, U3U3EGG, U3CEGG, Q1Q1EGG, Q1U3EGG.
  • Shaft:
    • EN 1.4301 (AISI 304) or EN 1.4404 (AISI 316L) for d=19 (32, 40, 50, 65, 80-160).
    • d=22 for 50-200/2.2.
    • d=24 for 65-250, 80-200/250.
  • Bracket: Cast iron - Aluminium.
• Applicable Standard of Test: ISO 9906:2012 – Grade 3B.
• Performance Range and Selection Chart: Detailed tables showing flow rate (l/min, m³/h) versus total manometric head (meters) for various pump types and power ratings are provided in the source document. See the official PDF for exact tabulated values.
• Impeller Diameter: Specific impeller diameters are listed for each pump model and power rating (e.g., 32-125/0.25 (0.25 kW) has an impeller diameter = 133 mm).
• Bearings: Specific ball bearing types are listed for the pump side and fan side for each model. See the official PDF for exact tabulated values.
• Coupling: Detailed dimensions for couplings (e.g., d, d1, d2, d3, M, L, L1, b, h, Set screw) are provided per pump type. See the official PDF for exact tabulated values.

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Disclaimer: This summary is based on the extracted text and may not include all figures, footnotes, or the complete context of the original OEM PDF datasheet. For contractual data and comprehensive information, please refer to the official OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror