Roll over image to zoom
SKU: 93209282
Grundfos NB 40-250/260 Cast Iron 3 kW End Suction Centrifugal Pump with Closed Impeller
Australia-Wide
(08) 9240 2992
Official Grundfos
Peace of Mind
Product Overview
Facility chilled water headers and cooling circuits rely on the Grundfos NB 40-250/260 centrifugal pump. The unit couples a 3 kW drive motor to an axial DN 65 inlet nozzle and a radial DN 40 discharge connection.
Operational delivery achieves 534 L/Min rated throughput while generating up to 19.47 m maximum head. Volute casing construction features EN-GJL-250 cast iron with cataphoretic electrocoating, paired with a stainless steel impeller and BQQE shaft seal. Product net weight equals 83 kg.
Power delivery via a 415 V three-phase line operates the 3 kW motor at a current draw of 6.23 Amps. Operating limits support liquid temperatures from -25°C to 120°C and maximum system pressures of 16 bar. Flanged pipework attaches via DN 65 inlet and DN 40 outlet ports.
Motor enclosure integrity satisfies IP55 standards, utilizing Class F temperature insulation. Standard motor installation requires external electrical overload protection. The back-pull-out design allows complete drive and rotating assembly extraction while leaving the casing secured to distribution pipework.
Features
- Standard PN16 flanged port interfaces align with EN1092-2 heating and cooling headers.
- Totally enclosed fan cooled IEC motor rated for S1 duty cycles in ambient environments up to 40°C.
- Service-friendly back-pull-out layout enables rotating element servicing without removing pipework.
- Balanced impeller geometry and shaft construction reduce operational vibration throughout duty range.
- Volute casing design incorporates integral base feet for direct mounting to concrete plinths.
- Internal wear rings retain hydraulic clearance tolerances throughout long service cycles.
- Solid stub shaft supported by sealed ball bearings carries axial and radial loads.
SPECIFICATIONS
| Max Flow | 534 L/Min |
| Max Head | 19 m |
| Power | 3 kW / 415v |
| Rated Current | 6.23 Amps |
| Suitable For | District Heating & Cooling Networks |
| Body Material | Cast Iron |
| Liquid Temperature | -25°C to 120°C |
| Inlet Size | 65 mm |
| Outlet Size | 40 mm |
| Warranty | 24 Months |
Warranty & Returns
All products supplied by Foundation Pumps are covered by a minimum 12-month warranty unless otherwise stated. Some brands may offer longer manufacturer warranties. Warranty covers manufacturing defects, faulty materials and workmanship under normal use.
- Products must be installed correctly and in accordance with the manufacturer’s instructions.
- Warranty does not cover incorrect installation, misuse, dry running, normal wear and tear, unauthorised repairs or damage caused by external factors.
- Proof of purchase, photos, videos and installation details may be requested when assessing a warranty claim.
- The customer is responsible for returning the product to Foundation Pumps or the nominated service centre unless otherwise agreed.
- Removal, reinstallation, labour and associated site costs are generally the customer’s responsibility unless required under Australian Consumer Law.
- Change-of-mind returns may be accepted within 30 days provided the product is unused, uninstalled and returned in its original packaging.
- Customers are responsible for return freight costs for change-of-mind returns.
- Restocking fees may apply to special-order, bulky or non-stocked products.
- Used, installed or specially ordered products may not be eligible for change-of-mind returns.
- If a product arrives damaged or faulty, please contact Foundation Pumps as soon as possible so we can assist with the appropriate repair, replacement or refund.
Your rights under Australian Consumer Law are not affected.
Is internal component servicing simplified by the casing construction?
Fast servicing on the Grundfos NB 40-250/260 is enabled by back-pull-out architecture, keeping the volute casing bolted to facility pipework.
How does the pump construction provide lasting resistance to fluid wear?
High-grade EN-GJL-250 cast iron forms the casing of the NB 40-250/260, housing a stainless steel impeller for lasting service.
How much volumetric flow and hydraulic lift can this unit maintain?
Supplying up to 534 L/Min in liquid flow and 19.47 m in dynamic head, the NB-40-250-260 accommodates diverse operating conditions.
How much electrical energy and supply amperage does this drive require?
Powered by a 3 kW electric motor, the NB 40 250 260 connects to a 415 V three-phase feed and draws 6.23 Amps with an IP55 enclosure.
Which inlet and outlet port sizes are featured on this centrifugal unit?
Pipe connections on the NB/40/250/260 consist of an axial 65 mm inlet and a radial 40 mm outlet meeting PN16 flange standards.
Need help choosing the right pump?
Our team of pump experts are here to help you find the perfect solution for your application.
- Free expert advice
- Pump sizing & system recommendations
- Fast response — call or email us