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NKM-G 32 – horizontal pump DIN-EN 733, DN 32

Standardized single-stage pump to DIN-EN 733, in monoblock design. 4-pole motor (1 450 rpm), DN 32 discharge / DN 50 suction. Flow rate up to 18 m³/h, head up to 16 m, motors 0.25–1.1 kW. GG25 cast iron, AISI 304 shaft.

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Product description

NKM-G 32 is a standardized horizontal single-stage pump in accordance with DIN-EN 733, featuring a monobloc design and a 4-pole motor (1 450 rpm). Nominal discharge nozzle diameter DN 32, suction nozzle diameter DN 50. Flanged connection PN 16 in accordance with DIN 2533.

Volute casing made of GG25 cast iron (UNI ISO 185), shaft made of AISI 304 stainless steel. Impeller made of GG25 cast iron, dynamically balanced, with axial thrust compensation. Carbon/silicon carbide mechanical seal with EPDM O-rings in accordance with DIN 24960.

Enclosed asynchronous motor with external cooling. Protection rating IP 55, insulation class F. Power supply 230/400 V. Fluid temperature -10 °C to +140 °C, max. operating pressure 16 bar. The lower speed ensures quieter operation and a longer service life compared with the 2-pole NKP-G 32.

Main technical specifications

ParameterValue
Model rangeNKM-G 32 (SACI pumps)
StandardDIN-EN 733 (ex DIN 24255)
Designmonobloc with flexible coupling
Number of poles4 poles (1 450 rpm)
DN discharge / suction32 / 50
Flow rate range Qup to 18 m³/h
Head range Hup to 16 m
Motor power P20,25–1,1 kW
Power supply230/400 V
Pumped fluid temperature-10 °C to +140 °C
Max. ambient temperature40 °C
Max. operating pressure16 bar
FlangesPN 16 DIN 2533
Motor protection ratingIP 55
Insulation classF (155 °C)
Casing materialGG25 cast iron (UNI ISO 185)
Impeller materialGG25 cast iron (bronze on request)
Shaft materialAISI 304 stainless steel
Mechanical sealcarbon/silicon carbide, EPDM, DIN 24960

Selection table – available models

ModelImpeller ØPower P2Power supply
NKM-G 32-125.1/140Ø 1400,25 kW230/400 V
NKM-G 32-125/142Ø 1420,37 kW230/400 V
NKM-G 32-160.1/169Ø 1690,37 kW230/400 V
NKM-G 32-160/169Ø 1690,55 kW230/400 V
NKM-G 32-200.1/200Ø 2000,55 kW230/400 V
NKM-G 32-200/200Ø 2000,75 kW230/400 V
NKM-G 32-200/219Ø 2191,1 kW230/400 V

For help selecting the right model based on the required flow rate and head, contact us with your Q and H requirements.

Applications

  • Heating and air conditioning – circulation of hot and chilled water in HVAC systems in smaller buildings.
  • Water supply – domestic pressure boosting systems and small water supply systems.
  • Industrial piping systems – process water and auxiliary circuits.
  • Agriculture – irrigation of small areas and water transfer.
  • Cooling circuits – circulation of coolant in smaller systems.

Key benefits

  • DIN-EN 733 – standardised dimensions, interchangeable with products from other manufacturers.
  • 4-pole motor (1 450 rpm) – quieter operation, less wear and a longer service life.
  • Monobloc design – compact, with the motor directly connected to the pump, requiring less installation space.
  • Low power consumption from 0,25 kW – energy-efficient operation and low running costs.
  • All models 230/400 V – easy connection, even in smaller facilities.
  • Bronze impeller available on request – for drinking water and food processing applications.

Optional accessories

  • Bronze impeller GCuSn5Zn5Pb5 (version B)
  • Wear rings (Wr) – extended service life
  • Alternative mechanical seals – SiC/Viton, SiC/EPDM, bellows seals
  • O-rings: POWERseal EPDM

What is the difference between NKM-G 32 and NKP-G 32?

Both have a DN 32 discharge and identical hydraulics in accordance with DIN-EN 733. The NKM-G 32 (1 450 rpm) offers quieter operation and less wear – ideal for circulation and HVAC applications. The NKP-G 32 (2 900 rpm) achieves a higher head of up to 96 m – for pressure applications.

How do I choose the right model?

Tell us the required flow rate (Q) and head (H), and we will recommend the model with the highest efficiency at your required duty point.

What is the warranty?

NKM-G pumps come with a 24-month warranty.

Don't see the right gasket in our offer?

We can create the perfect seal for your needs, including non-standard sizes.

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