MD

Summary

Product Identification

The EBARA MD series consists of 2-pole, 50 Hz centrifugal pumps.

Operating Limits

• Liquid Handled: Clean water
• Liquid Temperature:
  • Standard: min. –5 °C to max. +90 °C
  • H-HS-HW-HSW versions: max. +110 °C
  • E version: max. +120 °C
• Maximum Working Pressure: 1 MPa
• Rotation Speed: ≈2900 min⁻¹
• Test Standard: ISO 9906:2012 - Grade 3B
• Kinematic Viscosity (for curve measurements): ν = 1 mm²/s (1 cSt)
• Minimum Flow Rate: Pumps should not be used at a flow rate below 10% of the best efficiency point to avoid overheating.

Materials of Construction

• Casing: Cast iron
• Impeller: AISI 304 (Closed centrifugal type)
• Shaft (wet extension): AISI 304
• Bracket: Cast iron
• Shaft Seal Type: Mechanical seal
  • MD (Standard): Ceramic/Carbon/NBR
  • MDH: Ceramic/Carbon/FPM
  • MDHS: SiC/SiC/FPM
  • MDHW: Tungsten Carbide/Tungsten Carbide/FPM
  • MDE: Carbon/Ceramic/EPDM VBEGF
  • MDHSW: SiC/Tungsten Carbide/FPM

Mechanical / Hydraulic Data

• Pipe Connection Flanges:
  • Suction: Flange to DIN 2532 (50 mm - 65 mm)
  • Discharge: Flange to DIN 2532 (32 mm - 40 mm - 50 mm)
• Standard Flange: UNI 2236
• Counterflange (On request): UNI 2247
• Bearings: Sealed ball bearings. Specific types vary by pump model (e.g., MD 32-250/5.5 uses 6306 2RS1 (pump side) and 6206 2RS1 (fan side); MD 50-250/22 uses 6309 2RS1 for both pump and fan sides). See the official PDF for exact tabulated values.
• Mechanical Seal Dimensions: Dimensions (Ø d1, Ø d2, L) vary by pump model. For example, MD 32-250/5.5 has 22 mm, 37 mm, 37.5 mm respectively. See the official PDF for exact tabulated values.
• Impeller Diameter: Varies by model and power. Examples:
  • MD 32-250/5.5: 218 mm
  • MD 32-250/11: 265 mm
  • MD 40-250/15: 259 mm
  • MD 50-250/22: 261 mm
• Performance Range: The selection chart provides capacity (Q) in l/min and m³/h, and total manometric head (H) in meters for various pump types and powers. For example, MD 32-250/5.5 (5.5 kW / 7.5 HP) can achieve 58 m head at 0 l/min and 38 m head at 400 l/min. See the official PDF for exact tabulated values and performance curves.
• Minimum Efficiency Index (MEI):
  • MD 32-250 series and MD 40-250 series: MEI > 0.70
  • MD 50-250 series: MEI > 0.40

Electrical Data

• Motor Type: Electric – TEFC, Three Phase
• Efficiency Level: IE2 and IE3 from 5.5 kW up to 22 kW
• Number of Poles: 2
• Insulation Class: F
• Protection Degree: IP 55 (CEI EN 60034-5)
• Power Rating: 5.5 ÷ 22 kW (7.5 ÷ 30 HP)
• Frequency: 50 Hz
• Voltage: 400/690 ±10% V
• Overload Protection: Provided by the user
• Motor Casing Material: Aluminium
• Base Material/Motor Support: Aluminium / Steel
• Cable Entry Dimensions: PG 13.5 - PG 16 - PG 21 (refer to dimensions pages 400-401 in the official PDF)
• Motor Data: Detailed efficiency (h %) and full load current (A) for both IE2 and IE3 motors at 400 V and 690 V are provided for each pump model. Locked rotor current is also specified. See the official PDF for exact tabulated values.

Noise Data

• Sound Pressure Level (LpA): Mean value measured at 1m distance around the pump, with a tolerance of ± 2.5 dB.
  • MD 32-250/5.5 to MD 32-250/7.5: 75 dB(A)
  • MD 32-250/9.2 to MD 40-250/11: 80 dB(A)
  • MD 40-250/15 to MD 50-250/22: 83-82 dB(A)

Dimensions and Weight

Detailed dimensions (e.g., B, DN1, P1, K1, D1, S1, DN2, P2, K2, D2, S2, H, H1, H2, H3, R, W, M, M1, N1, N2, A1, A2, C, F, V1, V2) and weights (kgf) are provided in extensive tables for each pump model (MD 32-250, MD 40-250, MD 50-250 series). Packing dimensions (X, Y, Z in mm) and weights (kgf) are also specified per pump type. See the official PDF for exact tabulated values and drawings.

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Disclaimer: This summary is based on extracted text and 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 for the project.

Official datasheet (PDF)

Lenntech datasheet mirror