MNE series 60Hz

Summary

Product Identification

The MNE series consists of close-coupled electric pumps designed in accordance with EN 733 (DIN 24255) standards. These are monobloc electric pumps, coupled to IEC standard electric motors via a rigid coupling.

Key performance ranges for the series include:

• Capacity: Up to 470 m³/h
• Head: Up to 145 m
• Power: Up to 90 kW

Model identification follows a specific structure, for example, MN40E50-250-2P-60-TM-SS:

• M: Monobloc electric pump
• N: Standardized pump (EN 733)
• 40: Nominal power in HP (range: 1.5 to 125 HP)
• E: High efficiency series
• 50: Nominal outlet diameter (range: 32 to 125)
• 250: Nominal impeller diameter (range: 160 to 315)
• -2P: Number of poles (2P or 4P)
• -60: Frequency (60Hz)
• -TM: Seal type (TM = Mechanical seal, TB = Packed gland)
• -SS: Impeller type (SS = AISI 304 stainless steel, GG = Carbon steel + Cataphoresis)

Operating Limits

• Max. solids content: 40 g/m³
• Max. water temperature: 90 °C
• Max. running time with Q=0: 2 min
• Max. suction pressure: Varies by model, up to 7 bar for some 4-pole models, and 2 bar for some 2-pole models.
• Max. operating pressure: 10 / 16 bar (including suction pressure)

Feed Water

Pump performance data is based on:

• Liquid density: 1000 kg/m³
• Kinematic viscosity: Not higher than 1 mm²/s
• Temperature: Cold water (20°C)
• Pressure: Atmospheric pressure (1 bar)
• Solids content: Max. 40 g/m³

Electrical

• Motor type: Three-phase closed asynchronous electric motors
• Protection class: IP 55
• Insulation class: F
• Frequency: 60Hz
• Poles:
  • 2 poles for 3500 min⁻¹ operation
  • 4 poles for 1750 min⁻¹ operation

Mechanical / Hydraulic

• Construction: Close-coupled electric pumps with pump bodies compliant with EN 733 - DIN 24255 standards, coupled to IEC standard electric motors via a rigid coupling.
• Performance Guarantee: Guaranteed according to ISO 9906 Grade 3B norms.
• Materials:
  • Pump body, Wear ring, Support, Coupling, Cover: Cast iron
  • Shaft, Spacer, Twinner System®: Stainless steel
  • Shaft protection bushing: Chromed stainless steel
  • Stuffing box packing: Synthetic fibers
  • Impeller:
    • Standard: SS (AISI 304 stainless steel) or GG (Carbon steel + Cataphoresis)
    • AISI 304 stainless steel investment casting impellers are suitable for discontinuous service applications (e.g., firefighting installations).
• Seal Types:
  • Mechanical Seal (TM version, DIN 24960):
    • Sliding faces: Carbo-graphite resin impregnated, Alumina oxide, Tungsten carbide, Silicon carbide.
    • Secondary seals: Nitrile rubber (NBR), Fluoroelastomer.
    • Spring: AISI 304 stainless steel, AISI 316 stainless steel.
  • Packed Gland (TB version): Features the Twinner System®.
• Twinner System®: This system for packed gland versions includes a two-half stainless steel flange for easy replacement of stuffing box packing, long-lasting packing on a chromium-coated stainless steel bush, and stainless steel screws designed for easy disassembly even after extensive operation. This allows maintenance in the stuffing box chamber without removing the shaft support.
• Flange Forces and Moments: Detailed tables for forces (Fy, Fz, Fx, ΣF) and moments (My, Mz, Mx, ΣM) on both outlet and inlet flanges are provided for various nominal diameters (DN). See the official PDF for exact tabulated values.

---

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