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NM, NMS centrifugal pumps in close-coupled design - 2- and 4-pole, to DIN EN 733

The centrifugal pumps NM, NM4, NMS and NMS4 are powerful centrifugal pumps in a compact block design with directly coupled motors up to 22 kW (15 kW for NM4). They have axial suction ports and radial discharge ports at the top, manufactured in accordance with the specifications of DIN EN 733.

  • Delivery rate (min/max)

    1 / 480 m³/h

  • Delivery head (min/max)

    3 / 95 m

  • Power (min/max)

    0.25 / 75 kW

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Data sheet (incl. characteristic curves)

Execution

  • Pump types:
    - NM / NM4Compact block design with directly coupled motor (extended shaft)
    - NMS / NMS4New lantern design with integrated axial bearing for standard motors (stub shaft principle)
  • Engine power:
    - Up to 22 kW (NM / NMS)
    - Up to 15 kW (NM4 / NMS4)
  • Rated speed (at 50 Hz):
    ≈ 2900 1/min → for NM, NMS (2-pole)
    ≈ 1450 1/min → for NM4, NMS4 (4-pole)
  • Pump body:
    - Axial suction port, radial discharge port at the top
    - Main dimensions and performance data in accordance with DIN EN 733
  • Materials:
    - Gray cast iron version (e.g. model N 40-250C)
    - Bronze version: BNM(S), BNM(S)4 series (housing & pressure cover made of bronze)

Applications

  • Pure, non-abrasive liquids that do not attack the pump materials (solids content max. 0.2 %)
  • Water supply
  • Heating, air conditioning and cooling circuits
  • Civil facilities and industry
  • Sprinkling and irrigation

Operating conditions

  • Medium temperature: from -10 °C to +90 °C
  • Ambient temperature: up to 40 °C
  • Vacuum-metric suction height: up to 7 m
  • Maximum permissible final pressure in the pump body: 16 bar (10 bar for NM 32/12; NM,NM4 32/16,20; NM,NM4 40/25; NM,NM4 50/20,25; NM4 65/31; NM,NM4 100/25; NM4 100/315,400; NM4 125/250 and bronze version)
  • Continuous operation

Special versions (on request)

  • Deviating voltages
  • Operation at 60 Hz
  • Alternative mechanical seals
  • Extended temperature ranges (higher or lower medium or ambient temperatures)

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Further products

NM, NMDC