The Grundfos NB40-315 Series is a high-performance, close-coupled end-suction centrifugal pump range engineered for demanding applications where exceptionally high head and reliable flow are critical. Designed to handle clean or slightly contaminated liquids without abrasive or fibrous solids, these non-self-priming, single-stage pumps feature an axial suction port and radial discharge port with a horizontal shaft configuration to maximise hydraulic efficiency and minimise flow losses.

The NB40-315 is equipped with a precisely engineered, hydraulically and dynamically balanced impeller to ensure smooth, vibration-free operation even at high pressures. Its robust cast iron housing combined with corrosion-resistant internal wear parts provides excellent durability and long-term reliability under continuous duty conditions.

Each pump in the NB40-315 Series is directly coupled to a powerful IEC-flanged three-phase AC motor running at 2900 RPM, delivering flow rates up to 900 LPM and achieving heads up to 160 metres (1600 kPa). A secure O-ring seal between the pump housing and cover ensures leak-free operation and safe, reliable system performance at high operating pressures.

Compact, efficient and easy to maintain, the NB40-315 Series is the ideal solution for high-pressure water supply, industrial process boosting, cooling water transfer, HVAC systems, and large-scale irrigation projects where dependable high-head performance is essential.

FEATURES

• Non-self-priming, single-stage, close-coupled centrifugal pump
• Axial suction and radial discharge for efficient, unrestricted flow
• Hydraulically and dynamically balanced impeller for smooth high-pressure performance
• Heavy-duty cast iron housing with corrosion-resistant internal components
• O-ring seal for secure, leak-free operation at extreme heads
• Direct coupled IEC flanged three-phase AC motor (2900 RPM)
• DN65 inlet / DN40 outlet with PN16 flanged connections
• Delivers flow up to 900 LPM and heads up to 160 metres (1600 kPa)
• Ideal for high-head water supply, industrial boosting, HVAC, cooling and irrigation systems