NMP

Summary

Product Identification

The NMP series consists of self-priming centrifugal pumps with a built-in strainer.

• NMP: Version with pump casing and lantern bracket in cast iron, with cataphoresis coating.
• B-NMP: Version with pump casing and lantern bracket in bronze (pumps supplied fully painted).
• NMPM: Single-phase 230 V ± 10% motor, with thermal protector.

Applications

• For water circulation in swimming pool filtration systems.
• For clean or slightly dirty water with solids in suspension.

Operating Limits

• Liquid temperature: up to 60° C
• Ambient temperature: up to 40° C
• Total suction lift: up to 7 m
• Maximum permissible working pressure: up to 6 bar
• Duty: Continuous

Feed Water

• Suitable for clean or slightly dirty water with solids in suspension.
• Built-in strainer features an inner basket with Ø 3 mm holes.

Electrical

• Motor Type: 2-pole induction motor, 50 Hz (n ≈ 2900 rpm).
• Three-phase (NMP):
  • 230/400 V ± 10% up to 3 kW
  • 400/690 V ± 10% from 4 to 7,5 kW
• Single-phase (NMPM):
  • 230 V ± 10%, with thermal protector.
• Insulation Class: F
• Protection: IP 54
• Efficiency: Classification scheme IE3 for three-phase motors from 0,75 kW.
• Standards: Constructed in accordance with EN 60034-1; EN 60034-30-1; EN 60335-1, EN 60335-2-41.

Mechanical / Hydraulic

• Construction: Close-coupled self-priming centrifugal pumps with built-in strainer.
• Strainer: Inner basket with Ø 3 mm holes.
• Materials:
  • Component | NMP | B-NMP
  • Pump casing | Cast iron | Bronze
  • Lantern bracket | GJL 200 EN 1561 | G-Cu Sn 10 EN 1982
  • Impeller | Cast iron GJL 200 EN 1561 | Bronze G-Cu Sn 10 EN 1982
  • Impeller (NMP 32/12) | Brass P- Cu Zn 40 Pb 2 UNI 5705 | -
  • Shaft | Chrome-nickel steel 1.4305 EN 10088 (AISI 303) | Cr-Ni-Mo steel 1.4401 EN 10088 (AISI 316)
  • Strainer cover | Cast iron GJL 200 EN 1561 | Bronze G-Cu Sn 10 EN 1982
  • Strainer | Chrome-nickel steel 1.4301 EN 10088 (AISI 304)
  • Mechanical seal | Carbon - Ceramic - FPM

Performance, Dimensions, and Weights

Performance curves, detailed performance tables, and specific dimensions and weights for various models are available. See the official PDF for exact tabulated values.

Special Features on Request

• Other voltages.
• Frequency 60 Hz (as per 60 Hz data sheet).
• Protection IP 55.
• Special mechanical seal.
• Higher liquid or ambient temperatures.

Features

• Flexible: Option to choose between cast iron and bronze materials for hydraulic parts in contact with pumped liquid.
• Stainless steel filter: Large capacity, easy to remove for inspection and cleaning.
• Exclusive design: Innovative, patented guard prevents contact with rotating parts while allowing inspection of the mechanical seal.
• Reliable: Bearing and shaft designed to reduce stress, providing high reliability under all operating conditions.

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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