NKM-GE-NKP-GE

Summary

Product identification

DAB PUMPS NKM-GE and NKP-GE series are enbloc electronic centrifugal pumps with coupling. They are designed for a wide range of applications including:

• Circulation of hot water for heating.
• Circulation of cold water for air conditioning.
• Circulation of cold water for cooling.

These pumps are highly versatile due to the MCE/C inverter, which allows performance to automatically adapt to system requirements while maintaining constant differential pressure. NKP-GE models feature 2-pole motors, while NKM-GE models feature 4-pole motors.

Operating limits

• Speed of rotation: 1450 - 2900 1/min
• Operating range: From 1 to 450 m³/h head up to 72 metri
• Liquid temperature range: From -10°C to +140°C
• Maximum ambient temperature: +40°C
• Maximum operating pressure: 16 bar (1600 kPa), except for DN 200 models which have a maximum of 10 bar.
• Installation: Normally horizontal or vertical, provided the motor is always above the pump.

Feed water

• 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 on request: Pumps for liquids other than water.
• Performance curves basis: Kinematic viscosity values = 1 mm²/s and density equal to 1000 kg/m³. Curve tolerance according to ISO 9906.

Electrical

• Protection rating: IP 55
• Insulation class: F
• Motor type: Asynchronous, closed motor cooled by external ventilation, construction design B3/B5.
• Inverter modulation: 0-10V signal (on request).
• Special versions on request: Other voltages and/or frequencies.

NKM-GE 4 poles electrical data

• Voltage: 1x220-240 V ~ or 3x400 V ~
• P1 (PUMPS+INVERTER): 0.44 to 17.48 kW
• P2 Nominal: 0.25 to 15.00 kW (0.33 to 20.00 HP)
• Nominal Current (In): 4.7 to 34.7 A
• Motor Size: MEC71 to MEC160L
• Mechanical Seal Ø: 28 or 38 mm
• DNA (Suction Nominal Diameter): 50 to 200
• DNM (Discharge Nominal Diameter): 32 to 150 See the official PDF for exact tabulated values for specific models.

NKP-GE 2 poles electrical data

• Voltage: 1x220-240 V ~ or 3x400 V ~
• P1 (PUMPS+INVERTER): 1.41 to 17.35 kW
• P2 Nominal: 1.10 to 15.00 kW (1.5 to 20.0 HP)
• Nominal Current (In): 4.05 to 34.5 A
• Motor Size: MEC80 to MEC160M
• Mechanical Seal Ø: 28 mm
• DNA (Suction Nominal Diameter): 50 to 100
• DNM (Discharge Nominal Diameter): 32 to 80 See the official PDF for exact tabulated values for specific models.

Mechanical / hydraulic

• Pump body: Spiral single-stage body in cast iron according to DIN-EN 733 (ex DIN 24255).
• Support: Cast iron.
• Flanges: According to DIN 2533 and DIN 2532 for DN 200. Flanging is PN 16 DIN 2533.
• Impeller: Cast iron, sealed and dynamically balanced with compensation of the axial thrust via balancing holes. Operates (on request) on interchangeable wear rings.
• Pump shaft: AISI 304 stainless steel.
• Mechanical seal: Standardised mechanical seal according to DIN 24960 in carbon/silicon carbide with O-rings in EPDM.

Standard materials

• 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 available as an alternative)
• PUMP SHAFT: AISI 304 - UNI 6900/71 STAINLESS STEEL
• MECHANICAL SEAL: CARBON/CARBORUNDUM - EPDM (Other options include CARBON/CARBORUNDUM - PTFE, CARBORUNDUM/CARBORUNDUM - VITON, CARBON/CARBORUNDUM - VITTON)
• O RING: VITON
• BLEED COCK: AISI 304 - UNI 6900/71 STAINLESS STEEL

Dimensions and weights

Flange dimensions (mm) and overall dimensions and weights are provided in the official PDF. See the official PDF for exact tabulated values.

Disclaimer

This summary is based on extracted text and may not include all figures, footnotes, or the latest revisions from the complete OEM PDF datasheet. For contractual purposes, all data must be verified against the specific OEM PDF revision used for the project.

Official datasheet (PDF)

Lenntech datasheet mirror