NCD Single Stage Centrifugal Pumps

Summary

Product Identification

The NCD series consists of single-stage horizontal shaft pumps, with main dimensions and characteristics conforming to EN733 (DIN 24255) standards.

The pump coding follows the format: NCD + Number of poles + Nominal diameter (mm) of delivery port + Impeller diameter (mm). For example, NCD4P50-250 indicates:

• Series: NCD (with Cast Iron impeller)
• Number of poles: 4P
• Nominal diameter of delivery port: 50 mm
• Impeller diameter: 250 mm

Applications

NCD series standardized pumps are designed for various applications, including:

• Fire-fighting
• Industrial water supply
• Industrial uses
• Anti-frost protection
• Irrigation
• Medium and large heating and air conditioning systems
• Water supply for both civil and industrial uses

Operating Limits

• Max. temperature of pumped liquid: +90°C (special versions on request +140°C)
• Min. temperature of pumped liquid: -10°C
• Max. operating time with closed discharge and liquid at 90°C: 30 sec.
• Nominal pressure: 10/16 bar (with flanging conforming to UNI 2223 PN16/PN25)
• Inlet maximum pressure: Varies by model (e.g., 10 bar for NCD4P32-125, 16 bar for NCD4P40-160). See the official PDF for exact tabulated values per model.
• Pumps can operate with all fluids chemically and mechanically compatible with the pump materials. Special versions can be supplied on request.
• Maximum speed: Varies by model and configuration (e.g., 1450 min⁻¹, 1750 min⁻¹, 2900 min⁻¹, 3450 min⁻¹). See the official PDF for exact tabulated values per model.

Mechanical / Hydraulic

• Pump casing: Volute type with flanged delivery port.
• Impeller: High efficiency closed type with balanced axial thrust. Available in either cast iron or bronze.
  • Specific sizes (32-125, 32-160, 32L-200, 40-200) have a bronze impeller.
• Shaft: AISI 430 stainless steel, fully protected against contact with the pumped water. Guided and supported by two ball bearings housed in the connecting support, permanently lubricated with high quality grease.
• Seal: Mechanical type, housed in the connecting support and easily replaceable. Conforming to DIN 24960 - ISO 3069.
  • Mechanical Seal Materials:
    • Spring: AISI 316
    • Gaskets: EPDM
    • Static seat: Silicon Carbide
    • Rotating seat: Silicon Carbide
• Coupling to the motor: Flexible coupling and spacer, available on request.
• Construction concept: BACK PULL OUT allows the wet end to be disassembled from the rear for inspection and repairs without disconnecting the motor or the pump casing from the piping.
• Direction of rotation: Clockwise viewed from drive side.
• Port positioning: Axial for suction / radial delivery port pointing upwards.
• Flanges: Conforming to UNI EN 1092-2.

Feed Water

• Service conditions have been measured with cold water (15°C - 59°F) at 1 bar atmospheric pressure.
• Catalogue data refers to liquids with a density of 1 kg/dm³ and kinematic viscosity not exceeding 1 mm²/s.
• The pumps can operate with all fluids chemically and mechanically compatible with the pump materials.

Electrical

• Motor coupling: Pumps can be coupled to IP 55 standard electric motors with B3 motor mounting. They can also be coupled to high-efficiency motors.
• Efficiency class: IE3 for most motors.
  • Motors of 75 kW, 90 kW, 110 kW, 132 kW are in IE4 efficiency class according to EU REGULATION 2019/1781. Other efficiency classes are available for non-EU markets.
• Voltage variation: ± 10% (400V).
• Max. number starts/hour: 3 (equally distributed).
• Electric motor operating limits: In compliance with IEC 34-1.
• Dynamic momentum J [kg m²]: Values are indicative and vary by motor power and number of poles (2 Poles 50 Hz, 4 Poles 50 Hz). 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 official OEM PDF datasheet. Contractual data must always match the specific OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror