MEW series 50Hz

Summary

Product identification

The Rovatti MEW series are 50Hz close coupled electric pumps. This document is part of the general catalogue, identified as CBMW50-16-IGFDE-R2.

Operating limits

• Max. solids contents: 40 g/m³
• Max. water temperature: 90 °C
• Max. running time with Q=0: 2 min
• Max. operating pressure: 10 bar
• Max. suction pressure: 4 bar
• Max. environment temperature: 40 °C
• Max. altimetric level: 1000 m
• Max. voltage tolerance: ± 5% of value shown on motor plate

Feed water

Pump performances are referenced to cold water (20°C) at atmospheric pressure (1 bar) according to ISO 9906 - Annex A norms. Catalogue performances refer to liquids with a density of 1000 kg/m³ and kinematic viscosity not higher than 1 mm²/s.

Electrical

The pumps are three-phase (TRIFASE) and operate at 50Hz.

• Power range: up to 22 kW
• Rated Power and Current (examples from table):
  • 2.2 kW (3 HP): 8.1 A (230 V), 4.7 A (400 V), COS φ 0.83, η 81.5%
  • 22 kW (30 HP): 74.5 A (230 V), 43 A (400 V), COS φ 0.88, η 84%
  • See the official PDF for exact tabulated values for all models.
• Max. number of starting / hour (equally distributed):
  • ≤ 5.5 kW: 14
  • 7.5 ÷ 11 kW: 10
  • 15 ÷ 22 kW: 6

Mechanical / hydraulic

The MEW series are single-stage close coupled electric pumps with a keyed impeller on the motor shaft, axial inlet, and scroll outlet. They are designed for various applications, offering robust construction, easy installation, low running costs, safe operation, and reduced overall dimensions.

• Capacity: up to 180 m³/h
• Head: up to 65 m
• Tolerances: ISO 9906 Grade 3B
• Key features: Twinner System® flange in two stainless steel halves for easy stuffing-box packing replacement, easy-to-adjust and long-term functioning stuffing-box packing on a stainless steel chromium-coated bush, and stainless steel screws for easy disassembling. This system allows operation on the gland packing box without removing the shaft support.
• Materials of construction:
  • Pump body: Cast iron
  • Impeller: Brass (for MEW../40BN models), Cast iron (for other models)
  • Wear ring: Cast iron
  • Support: Cast iron
  • Shaft: Steel
  • Twinner System® flange: Stainless steel
  • Stuffing-box packing: Synthetic fibers
  • Shaft protection bushing: Chromium plated brass
  • Motor: Aluminium
• Dimensions and Weight: Overall dimensions and weight vary by model. See the official PDF for exact tabulated values.
• Performance Data: Detailed performance curves (Head H m, NPSH m vs. flow rates in m³/h, l/s, l/min) are available for individual MEW models at 2900 min⁻¹. See the official PDF for exact tabulated values.

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Disclaimer: This summary is based on extracted text and may not include all figures, footnotes, or the latest revisions from the original OEM PDF. Contractual data must always match the specific OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror