3M / 3S / 3LM / 3LMZ / 3LS / 3LSZ / 3LP / 3D / 3DP

Summary

Product Identification

This document describes the EBARA 3 SERIES of centrifugal pumps, operating at 50 Hz. The series includes models 3M, 3S, 3P, 3LM, 3LMZ, 3LS, 3LSZ, and 3LP.

Pump sizes range from 32-125 up to 80-250, with various power and impeller configurations. Specific versions are available with different mechanical seals, including H, HS, HW, HSW, E, ES, Q1Q1EGG, Q1U3EGG, Q1AEGG, U3CEGG, and U3U3EGG. Some models are available only in a standard version or with specific limitations on U3U3EGG availability.

Operating Limits

• Liquid Temperature:
  • Minimum: -10 °C (Standard), -20 °C (E and ES versions)
  • Maximum:
    • +90 °C (Standard, Q1AEGG, U3U3EGG, Q1Q1EGG, Q1U3EGG, U3CEGG)
    • +110 °C (H, HS, HW, HSW versions)
    • +120 °C (E version)
    • For 3LS(Z) and 3LP models, maximum temperatures are generally higher: +110 °C (Standard, Q1AEGG, U3U3EGG, Q1Q1EGG, Q1U3EGG, U3CEGG, H, HW, HSW versions) and +120 °C (E and ES versions).
• 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.

Feed Water

• Type of Liquid: Clean water and moderately aggressive fluids.
• Special Versions (E and ES): Drinking water and water containing glycol.

Electrical

• Motor Type: Electric - TEFC (Totally Enclosed Fan Cooled)
• Number of Poles: 2
• Rotation Speed: ≈ 2900 min⁻¹
• Insulation Class: F (temperature rise class B for 3(.)S(Z) and 3(.)P models)
• Protection Degree (CEI EN 60034-5): IP 55
• Frequency: 50 Hz
• Overload Protection: Must be provided by the user.
• Motor Casing Material: Aluminium
• Motor Support Material: Cast iron - Aluminium
• Cable Entry Dimensions: M20x1.5, PG13.5, PG16, PG21, M32x1.5, M40x1.5, M50x1.5, M25x1.5 (specific combinations apply).
• Flange Mount (IEC Motor):
  • 3(.)S: IMB5 (up to 2.2 kW), IMB35 (3 kW and above)
  • 3LSZ: IM B35
  • IM B3

Power and Voltage:

Mechanical / Hydraulic

• Construction: Centrifugal pumps.
• Impeller Type:
  • Closed centrifugal type for 32, 40, 50 versions.
  • Reinforced laser welding for 40-200/11, 50-200/15.
  • Closed centrifugal three-dimensional blades for 65 and 80 versions.
• Shaft Seal Type: Mechanical seal, with stationary ring secured against rotation.
• Bearing: Sealed ball bearing.
• Applicable Standard of Test: ISO 9906:2012 – Grade 3B.
• Performance Curves: Refer to effective speed of asynchronous motors at 50 Hz, 2 poles. Measurements were carried out with clean water at 20 °C and a kinematic viscosity of ν = 1 mm²/s (1 cSt).
• Minimum Efficiency Index (MEI): Values are provided for specific models, ranging from > 0.40 to > 0.70. The MEI is based on the full impeller diameter.

Pipe Connections (Flange according to DIN 2532 Standard):

Materials of Construction:

• 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:
  • Ceramic/Carbon/NBR (Standard).
  • SiC/SiC/FPM (L version).
  • SiC/Carbon/EPDM (ES version, specifically for 80-250 2 poles Ø35).
• O-ring:
  • NBR (Standard).
  • FPM (for H, HS, HW, HSW versions).
  • EPDM (for E, ES versions and for Q1AEGG, U3U3EGG, Q1Q1EGG, Q1U3EGG, U3CEGG).
• Shaft:
  • EN 1.4301 (AISI 304) or EN 1.4404 (AISI 316L) for various models and shaft diameters (e.g., d=19, d=22, d=24).
  • EN 1.4462 (Duplex stainless steel) for specific models and shaft diameters (e.g., 65-250 d=24, 80-200/30-37 d=24, 80-250 d=29).
• Bracket: Cast iron - Aluminium.

Detailed performance ranges, selection charts, and performance curves for specific models (e.g., 32-125, 40-160, 50-200, 65-250, 80-250) are provided in the official PDF, including flow rates, heads, power, efficiency, NPSH, and impeller diameters. Sectional view drawings and tables with component materials are also available.

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. For contractual data and full specifications, please refer to the official OEM PDF revision used on your project.

Official datasheet (PDF)

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