The Grundfos NB series is a trusted line of single-stage centrifugal pumps built for demanding industrial environments. Designed with installers and facility managers in mind, these pumps deliver steady flow and reliable pressure for water supply, HVAC systems, fire protection, and general industrial processes. The NB range covers a broad spectrum of sizes, making it easy to find the exact match for your project requirements.

Reliable Single-Stage Centrifugal Design

Each pump in the NB series uses a straightforward single-stage centrifugal impeller. This design means fewer moving parts, which translates to smoother operation and lower maintenance costs. The robust wetted parts resist corrosion and wear, even when handling slightly aggressive fluids. Installers appreciate the straightforward layout, which allows for quick piping connections and straightforward alignment during setup.

Wide Range for Every Industrial Need

From compact models like the NB 32-125 to heavy-duty units like the NB 150-315, the NB series offers flexible options for flow and head requirements. You can choose standard configurations or opt for overdimensioned motors on select models to handle peak loads without tripping. The consistent naming convention helps you quickly identify the right pump for your system, whether you need a smaller inlet for light duty or a larger inlet for high-volume transfer.

Easy Installation and Maintenance

Installers love the NB series for its practical design. The back-pull-out feature allows you to inspect or replace the impeller and mechanical seal without disconnecting the piping. Standardized mounting dimensions and flange sizes mean you can swap out old units with minimal modifications to your existing setup. Routine checks are simple, and spare parts are widely available, keeping downtime to a minimum.

Built for Long-Term Performance

Engineered for continuous operation, the Grundfos NB pumps combine energy-efficient motors with precision-balanced rotors to reduce vibration and noise. Whether you are upgrading an older system or designing a new industrial facility, the NB series provides a dependable, cost-effective solution. Choose the NB series for a pump that works hard, lasts long, and keeps your operations running smoothly.