Single Stage Close-Coupled Pumps

EDUR-single stage close-coupled pumps are robust and efficient pumps with a long service life. They are characterized by compact assembly, customer-specific design options and a wide range of possible applications.

Fields of Application and Conveyed Fluids

Depending on customer requirements, our single stage close-coupled pumps are used in many applications: They can be used for cooling technology, energy technology, industrial cleaning technology, water and wastewater technology as well as in the chemical industry. The pumps are particularly suitable for the supply of pure or slightly contaminated liquids.

Variants of the Single Stage EDUR-Close-Coupled Pump

EDUR-Pumps | Single Stage Close-Coupled Pump NUB-Series

EDUR offers high-quality single stage close-coupled pumps with our NUB, CB and BC series. The pumps are available in a variety of construction styles and materials (e.g. grey cast iron, spheroidal graphite iron, bronze or stainless steel) as well as with various shaft seal systems and drive solutions. We deliver customer-specific configurations matched to our customer's requirements. Of course, we also provide certificates of all authorized classification societies and necessary test reports.


EDUR-single stage close-coupled pumps stand out due to their efficient, economic, reliable, and long-lasting performance. Additional product advantages as well as technical characteristics are outlined below:

Technical superiority

  • Variety of seal systems
  • Large selection of material options
  • Low NPSH (Net Positive Suction Head) values
  • Axial thrust-free, open or load-relieved, closed impellers
  • Compensation of the radial forces due to diffuser elements in the ring housing
  • Energy-efficient motors

Process safety

  • Unsusceptible to certain amounts of solid contents
  • Possible protection against dry run
  • Possible vacuum operation
  • Low-pulsation supply
  • Additional safety through the use of monitoring equipment
  • Low noise emissions
  • Long lifetime

High energy efficiency

  • Low flow velocity in the outlet branch
  • Low velocity head difference


  • Modular design for customized solutions
  • Compact close-coupled design / minimal space requirements
  • Various installation positions

Low maintenance

Field of application

  • Flow rate: max. 600 m³/h
  • Head: max. 98 m
  • Permissible operating pressure: up to 16 bar
  • Temperature: -50 °C to +140 °C
  • Viscosity: up to 200 mm²/s


Characteristic Curves

EDUR-Pumps | Characteristic Curves for Single Stage Close-coupled Pump NUB 50Hz
EDUR-Pumps | Characteristic Curves for Single Stage Close-coupled Pump NUB 60Hz