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Reliable Innovation by Design

The Grundfos NK range delivers industry-leading efficiencies and a rugged, back pull-out design that minimizes annual service costs throughout the lifetime of the pump. This series is built to be in everyone's comfort zone by providing steady, quiet operation and long-term mechanical integrity.

Optimize Your Performance

These designs provide peak performance because they are based on advanced Computational Fluid Dynamics. The sturdy NK base frame ensures long-lasting alignment of the pump and motor to prevent undue wear on seals and bearings. Additionally, the top centerline discharge design allows for self-venting and more compact piping designs in tight mechanical rooms.

Maximum Durability & Serviceability

Standard Silicon Carbide seals offer superior resistance to abrasives and a wide temperature range for demanding industrial liquids. The optimized stainless-steel impeller increases overall efficiency while reducing the NPSH required for your system. To save time during maintenance, the long-coupled design and optional spacer-coupling allow for service without removing the housing from the pipework or disturbing the motor.

Technical Summary & Performance Specs

Typical Services & Ideal Applications

The Grundfos NK series is engineered to master the movement of water and specialized media across diverse sectors. These pumps are the primary choice for large-scale temperature regulation and municipal water transport.

Versatile Solutions for HVAC and District Energy

In large-scale climate control, these pumps serve as the primary workhorse for both cooling and heating loops. The NK series is specifically engineered to handle the rigorous demands of district energy networks, providing reliable thermal distribution across expansive infrastructures. Its ability to maintain consistent pressure and flow makes it the definitive choice for facilities requiring precision temperature regulation in high-capacity environments.

Mastering Industrial and Water Utility Demands

Beyond standard climate control, the NK series is built to excel in heavy-duty industrial processes and municipal water utility tasks. The robust construction allows for the efficient movement of process water and specialized industrial fluids that may contain abrasives. For municipal applications, these pumps provide the high-flow capacity and head pressure necessary for reliable water transport and regional utility management.