NKM-G-NKP-G

Summary

Product Identification

DAB PUMPS NKM-G and NKP-G are standardised enbloc centrifugal electric pumps with integral shafts, designed for a wide range of applications including:

• Water supply
• Circulation of hot water for central heating
• Circulation of cold water for air conditioning and refrigerating
• Transfer of liquids in agriculture, horticulture, and industries
• Implementation of pumping systems

Operating Limits

• Operating range: From 1 to 105 m³/h with head up to 96 metres
• Liquid temperature range: From -10°C to +140°C
• Maximum ambient temperature: +40°C
• Maximum operating pressure: 16 bar (1600 kPa)
• Installation: Normally horizontal or vertical, provided the motor is always above the pump.

Feed Water

• Characteristics of pumped liquid: Clean, free from solids or abrasive substances, not viscous, not aggressive, not crystallised, chemically neutral, and close to the characteristics of water.
• Special versions: Pumps for liquids other than water are available on request.

Electrical

• Motor type: Closed, asynchronous motor with external ventilation.
  • NKP models: 2 poles (2900 1/min)
  • NKM models: 4 poles (1450 1/min)
• Rotor: Mounted on oversized ball bearings for silent running and long life.
• Standards: Built to IEC 2-3 standards.
• Protection level: IP 55
• Insulation level: F
• Standard voltage:
  • 230/400 V 50 Hz up to 2,2 kW included
  • 400 V Δ 50 Hz over 2,2 kW
• Overload protection: Recommended in accordance with current norms.
• Liquid density: For liquids denser than water, motors must be proportionally more powerful.
• Special versions: Other voltages and/or frequencies are available on request.
• Technical Data Tables: Detailed electrical data (P2 nominal kW/HP, In A, voltage) and weight (KG) are provided for numerous NKM-G (4 poles) and NKP-G (2 poles) models, with both cast iron and bronze impellers. See the official PDF for exact tabulated values.

Mechanical / Hydraulic

• Pump body: Single-stage, cast iron spiral body made to DIN-EN 733 (formerly DIN 24255).
• Support: Cast iron.
• Flanges: In accordance with DIN 2533 (PN 16).
• Impeller: Cast iron (standard) or Bronze GCuSn5Zn5Pb5 (on request), encased and dynamically balanced with compensation of the axial thrust by means of balancing holes. Can operate with interchangeable consumable rings (on request).
• Pump shaft: AISI 304 stainless steel.
• Seal: Standardised mechanical seal made to DIN 24960 in carbon / carborundum with O’ rings in EPDM.
• Materials (Standard Version):
  • PUMP BODY: 250 UNI ISO 185 CAST IRON
  • SUPPORT: 250 UNI ISO 185 CAST IRON
  • IMPELLER: 250 UNI ISO 185 CAST IRON (Bronze GCuSn5Zn5Pb5 UNI 7013/8a-72 for bronze impeller versions)
  • PUMP SHAFT: AISI 304 - UNI 6900/71 STAINLESS STEEL
  • MECHANICAL SEAL: CARBON/CARBORDUM - EPDM (other options like CARBON/CARBORUNDUM - PTFE, CARBORUNDUM/CARBORUNDUM - VITON, CARBON/CARBORUNDUM - VITON are listed for special versions)
  • O RING: VITON
  • SPACER SEAL: AISI 304 - UNI 6900/71 STAINLESS STEEL
  • SEAL HOLDER DISK: 250 UNI ISO 185 CAST IRON
  • BLEED COCK: AISI 304 - UNI 6900/71 STAINLESS STEEL

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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