NM, NMS

Summary

Product identification

The Calpeda NM, NMS series are close-coupled centrifugal pumps with flanged connections.

• NM(S) version: Pump casing and lantern bracket in cast iron.
• B-NM(S) version: Pump casing and lantern bracket/casing cover in bronze.
• Pumps are supplied fully painted.

A version with frequency converter, designated NM EI, is also available.

Applications

These pumps are designed for clean liquids without abrasives, which are non-aggressive for the pump materials.

• Solids content up to 0,2%.
• Suitable for water supply.
• For heating, air conditioning, cooling, and circulation plants.
• For civil and industrial applications.
• For fire fighting applications.
• For irrigation.

Operating limits

• Liquid temperature: from -10 °C to +90 °C
• Ambient temperature: up to 40 °C
• Total suction lift: up to 7 m
• Maximum permissible working pressure: up to 10 bar (16 bar for NM 40/16,20; NM 50/12,16; NM 65/12,16,20,25; NM 80/16)
• Duty: Continuous

Mechanical / hydraulic

Construction

• Motor connection:
  • Electric motor with extended shaft directly connected to the pump up to 22 kW.
  • New bracket construction for standard motors (stub-shaft construction) from 30 to 75 kW with integrated thrust bearing.
• Pump casing: Axial suction and radial delivery on top.
• Main dimensions and performance according to EN 733.
• Connections: Flanges according to PN 10, EN 1092-2. Counter-flanges are available on request.
• Flange Sizes:
  • From NM 32/.. to NM 50/...: Screwed flanges EN 1092-1, PN 16
  • From NM 65/.. to NMS 100/...: Flanges for welding EN 1092-1, PN 10

Materials

Performance

Performance curves and detailed tables for various models (NM, NMS, B-NM, B-NMS) are available in the official PDF. Tolerances are according to UNI EN ISO 9906:2012.

Dimensions and weights

Detailed dimensions and weights for NM, NMS, B-NM, B-NMS, and NM EI models are provided in extensive tables and diagrams in the official PDF. See the official PDF for exact tabulated values.

Electrical

• Motor type: 2-pole induction motor, 50 Hz (n ≈ 2900 rpm).
• Voltage:
  • NM, NMS: three-phase 230/400 V ± 10% up to 3 kW.
  • NM, NMS: three-phase 400/690 V ± 10% from 4 to 75 kW.
• Insulation class: F
• Protection: IP 54 (IP 55 for NMS)
• Frequency converter suitability: Motor suitable for operation with frequency converter from 1,1 kW.
• Efficiency: Classification scheme IE3 for three-phase motors from 0,75 kW.
• Standards: Constructed in accordance with EN 60034-1; EN 60034-30-1.

NM EI (Pumps with frequency converter)

• Power output: Rated motor power output from 0,55 kW up to 22 kW.
• Equipped with I-MAT installed on board for a compact and efficient variable-speed system.
• Control range: From 1750 to 2900 rpm (2-pole).
• Protections:
  • Dry running
  • Operations with closed valve ports
  • System leakages
  • Overcurrent in the motor
  • Overvoltage and undervoltage of the power supply
  • Current unbalances between phases
• Operating modes:
  • Constant pressure mode (with pressure transducer)
  • Proportional pressure mode (with pressure transducer)
  • Constant flow mode (with flow meter)
  • Fixed speed mode (with setting of the speed preferential rotation)
  • Constant temperature mode (with temperature transducer)

Special features on request

• Other voltages.
• Frequency 60 Hz (as per 60 Hz data sheet).
• Protection IP 55.
• Special mechanical seal.
• Packed gland (only for NM standard construction).
• Single-phase motor (NMM) up to 1,5 kW.
• Higher or lower liquid or ambient temperatures.
• Motor suitable for operation with frequency converter up to 0,75 kW.

Compliance

The electropumps NM, B-NM, NMS, B-NMS series comply with the European Regulation no. 547/2012.

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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 datasheet. Contractual data must always match the specific OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror