Grundfos - NB 80-250/257AASF2AESBQQEVW1 Circulator Pump - 400V - Three Phase - 3879 Ltr/min. - Cast Iron

Non-self-priming, single-stage, centrifugal volute pump unit designed according to ISO 5199 with dimensions and rated performance according to EN 733 (10 bar). Flanges are PN 16 with dimensions according to EN 1092-2. The pump has an axial suction port, radial discharge port, horizontal shaft and a back pull-out design enabling removal of the motor, motor stool, cover and impeller without disturbing the pump housing or pipework. The unbalanced rubber bellows seal is according to DIN EN 12756. The pump is close-coupled to a fan-cooled asynchronous motor.

Suitable for: Commercial air conditioning, Industrial heating, Irrigation

Real-world product applications

• Circulating water around closed-loop pipework systems
• Maintaining flow through distribution circuits
• Supporting recirculation in building services installations
• Keeping consistent flow through equipment or pipe runs
• Assisting with loop circulation for system efficiency

Key Product Features

• Net weight: 690 kg
• Mains frequency: 50 Hz
• Rated Head: 84.26 m
• Rated Flow: 232.8 m³/h
• Product Voltage: 3 x 380-420D/660-725Y V
• Temperature Liquid Range: -25 .. 120 °C
• Pumped Liquid: Water
• Maximum Operating Pressure: 16 bar
• Impeller Material: Cast Iron
• Pump Housing Material: Cast Iron

This is a Grundfos Circulator pump which can be used within closed loop cooling, heating and hot water systems.

Grundfos (est. 1945) is a Danish pump manufacturer known for high-efficiency circulators, multistage boosters, borehole and wastewater pumps, plus packaged pressure systems. The range covers HVAC circulation, domestic hot water recirculation, pressure boosting, industrial water transfer and public water management, with strong focus on energy efficiency and intelligent controls.