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SKU: 93207129
Grundfos NB 125-250/220 Cast Iron 11 kW End Suction Centrifugal Pump with Closed Impeller
Australia-Wide
(08) 9240 2992
Official Grundfos
Peace of Mind
Product Overview
Mechanical plant cooling circuits and condenser water risers deploy the Grundfos NB 125-250/220 centrifugal pump. Powered by a 11 kW electric drive, piping connects via an axial DN 150 suction port and a radial DN 125 discharge interface.
Fluid discharge volume delivers approx. 4960 L/Min maximum throughput alongside a approx. 15.9 m maximum head elevation. A cataphoretically coated EN-GJL-250 cast iron casing houses the precision stainless steel impeller and BQQE mechanical shaft seal. Total net product weight measures 247 kg.
A nominal draw of 22.3 Amps from a 415 V three-phase feed powers the 11 kW motor assembly. Permissible media temperatures range between -25°C to 120°C under system pressures up to 16 bar. Flanged line ports measure DN 150 for suction and DN 125 for discharge.
Motor housing detailing provides an IP55 ingress rating and Class F winding insulation. The motor requires external overload protection in the electrical control panel. A back-pull-out mechanical design enables service personnel to extract the impeller and drive assembly without dismantling pipe flanges.
Features
- 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.
- Standard PN16 flanged port interfaces align with EN1092-2 heating and cooling headers.
SPECIFICATIONS
| Max Flow | 4960 L/Min |
| Max Head | 15.9 m |
| Power | 11 kW / 415v |
| Rated Current | 22.3 Amps |
| Suitable For | District Heating & Cooling Networks |
| Body Material | Cast Iron |
| Liquid Temperature | -25°C to 120°C |
| Inlet Size | 150 mm |
| Outlet Size | 125 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.
Which inlet suction and outlet discharge port dimensions are used on this pumping assembly?
Piping interfaces on the Grundfos NB 125-250/220 feature an axial 150 mm suction intake and a radial 125 mm discharge port adhering to PN16 flanges.
Which metal grades and seal types are used in this pump assembly?
High-grade EN-GJL-250 cast iron forms the casing of the NB 125-250/220, housing a stainless steel impeller for lasting service.
How much power and supply amperage are required to run this pump?
The NB-125-250-220 is driven by a 11 kW motor running on a 415 V three-phase supply, drawing approximately 22.3 Amps with IP55 protection.
Can service staff inspect the shaft seal without breaking pipework connections?
Routine plant servicing is simplified on the NB 125 250 220 by its back-pull-out layout, allowing drive extraction without dismantling pipework.
How much fluid circulation and discharge height does this unit sustain?
The NB/125/250/220 provides approx. 4960 L/Min in fluid flow and approx. 15.9 m in dynamic head, depending on system pressure demands.
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