NRM2 Monobloc Centrifugal Pumps

Summary

Product identification

• Series: NRM Monobloc Normalised Centrifugal Pumps (2 and 4 poles)
• Pump Type: Single stage monobloc pumps with the hydraulic part-motor connection via a bell.
• Pump body standard: EN733/DIN24255

Applications

• Heating and cooling systems
• Collection of water from lakes, rivers, wells
• Irrigation systems using rain
• Water supply systems, fire fighting systems, pressurization systems

Operating limits

• Maximum ambient temperature: 40°C
• Temperature of pumped liquid: -10°C to +130°C
• Maximum operating pressure: 10 bar
• Installation: Pumps can be installed in all positions, except with the inlet facing upwards.

Feed water

• Type of liquid: non-aggressive, non-explosive, free of solid particles and fibres.
• Suitable for hot water for heating and coolants.

Electrical

• Motor type: Induction, closed, ventilated
• Degree of protection: IP 55
• Insulation: Class F
• Constructive shape: B3/B5
• Speed of rotation:
  • NRM4: 1450 rpm
  • NRM2: 2900 rpm
• Three-phase motor efficiency class:
  • IE2 from 0.75 kW
  • IE3 from 7.5 kW
• Voltage and current ratings vary by model and are detailed in the performance tables. See the official PDF for exact tabulated values.

Mechanical / hydraulic

Materials of Construction

• Pump body: Cast iron EN GJL 200
• Motor casing: Cast iron EN GJL 200
• Impeller: Cast iron EN GJL 200 (AISI 304 on request)
• Shaft: AISI 420 Stainless Steel
• Mechanical seal: Silicon carbide / Silicon carbide / NBR

Performance Data

Performance tables provide flow rates (Q in l/min and m³/h) versus head (m.c.a. / m.c.w.) for various NRM2 and NRM4 models, along with corresponding power (P2 in HP/kW), voltage (VOLT), and current (In in A). See the official PDF for exact tabulated values.

Dimensions and Weights

Overall dimensions (mm) and weights (Kg) are provided for each model. Flange dimensions for UNI PN16 are also tabulated for various DN sizes. See the official PDF for exact tabulated values.

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Disclaimer: This summary is based solely on the extracted text provided. It 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 on the project.

Official datasheet (PDF)

Lenntech datasheet mirror