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SKU: 93207143
Grundfos NB 125-250/269 Cast Iron 30 kW End Suction Centrifugal Pump with Closed Impeller
Australia-Wide
(08) 9240 2992
Official Grundfos
Peace of Mind
Product Overview
Central energy transfer skids and secondary hydronic circuits feature the Grundfos NB 125-250/269 centrifugal pump. Coupled to a 30 kW motor drive, fluid enters through an axial DN 150 suction port and exits through a radial DN 125 discharge flange.
Discharge delivery rating delivers approx. 6763 L/Min liquid volume while developing approx. 24.9 m maximum head. Constructed with an EN-GJL-250 cast iron volute protected by cataphoretic electrocoating, internal hydraulics feature a stainless steel impeller and BQQE mechanical shaft seal. Net weight is 376 kg.
Line electrical input requires 57.9 Amps from a 415 V three-phase line to deliver 30 kW rated output. Working tolerances accommodate fluid temperatures spanning -25°C to 120°C at pressures reaching 16 bar. Flanged connections feature DN 150 inlet and DN 125 outlet dimensions.
Assembly enclosure features an IP55 rating combined with Class F thermal insulation. Because built-in thermal protection is not included, external motor overload protection must be supplied. Maintenance is streamlined via a back-pull-out arrangement allowing rotating element removal while the casing remains connected to piping.
Features
- 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.
- 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.
SPECIFICATIONS
| Max Flow | 6763 L/Min |
| Max Head | 24.9 m |
| Power | 30 kW / 415v |
| Rated Current | 57.9 Amps |
| Suitable For | Facility Fluid Transfer & Circulation |
| 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.
How much running amperage and motor output power this pump drive?
Featuring a robust 30 kW motor, the Grundfos NB 125-250/269 operates on a 415 V three-phase supply, drawing 57.9 Amps with IP55 protection.
How does the pump housing construction resist mechanical piping strain?
High-grade EN-GJL-250 cast iron forms the casing of the NB 125-250/269, housing a stainless steel impeller for lasting service.
How much liquid displacement and dynamic head does this pump supply?
Supplying approx. 6763 L/Min in liquid flow and approx. 24.9 m in dynamic head, the NB-125-250-269 accommodates diverse operating conditions.
Which seal type and wear rings are fitted to this centrifugal pump assembly?
The NB 125 250 269 utilizes a robust BQQE mechanical shaft seal and replaceable wear rings to prevent fluid loss and preserve internal clearances.
How is ongoing drive maintenance made convenient by the back-pull-out design?
Extracting the rotating assembly on the NB/125/250/269 requires no pipe disconnection, thanks to its back-pull-out maintenance architecture.
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