Roll over image to zoom
SKU: 93207142
Grundfos NB 125-250/262 Cast Iron 22 kW End Suction Centrifugal Pump with Closed Impeller
Australia-Wide
(08) 9240 2992
Official Grundfos
Peace of Mind
Product Overview
Plant utility heating headers and distribution risers rely on the Grundfos NB 125-250/262 end-suction pump. Driven by an electric 22 kW motor assembly, the pump incorporates an axial DN 150 suction port and a radial DN 125 discharge connection.
Hydraulic movement output provides approx. 6438 L/Min maximum flow and reaches an upper head ceiling of approx. 23.3 m. The pump housing is cast in EN-GJL-250 iron with cataphoretic electrocoating. Fluid displacement is driven by a stainless steel impeller and a BQQE mechanical shaft seal. Net product weight measures 335 kg.
Operating on three-phase 415 V supply, the motor draws 42.2 Amps to generate 22 kW shaft power. Operational limits permit media temperatures from -25°C to 120°C under working pressures up to 16 bar. Flanged pipe connections measure DN 150 on the inlet and DN 125 on the outlet.
Drive frame detailing complies with IP55 ingress standards and Class F temperature insulation. Standard IEC electric drive design requires external motor overload protection. The back-pull-out structural layout permits complete motor and rotating assembly extraction without disconnecting piping headers.
Features
- Precision balanced rotating components reduce hydraulic noise and mechanical shaft deflection.
- Renewable casing wear rings retain pump efficiency and avoid direct volute casing wear.
- Solid shaft assembly with sealed ball bearings absorbs operational hydraulic and radial forces.
- EN1092-2 flanged connections conform to standard PN16 pipework dimensions.
- Continuous duty S1 rated electric drive motor operates in ambient temperatures up to 40°C.
- Back-pull-out layout permits motor and impeller servicing without breaking pipe connections.
- Integral casing support feet provide direct anchoring to plant room inertia bases and plinths.
SPECIFICATIONS
| Max Flow | 6438 L/Min |
| Max Head | 23.3 m |
| Power | 22 kW / 415v |
| Rated Current | 42.2 Amps |
| Suitable For | Commercial HVAC Hydronic 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.
What alloys form the wetted components and mechanical shaft seal?
Heavy-duty metallurgy on the Grundfos NB 125-250/262 combines an electrocoated EN-GJL-250 cast iron casing with a stainless steel impeller.
Which inlet suction and outlet discharge port dimensions are engineered onto this pump volute?
Pipe connections on the NB 125-250/262 consist of an axial 150 mm inlet and a radial 125 mm outlet meeting PN16 flange standards.
What peak fluid movement and discharge elevation does this unit maintain?
Operating capacity on the NB-125-250-262 reaches approx. 6438 L/Min in liquid flow and approx. 23.3 m in dynamic head across duty cycles.
Which seal type and wear rings protect against fluid leakage along the drive shaft?
Fluid containment in the NB 125 250 262 is maintained by a BQQE mechanical shaft seal, supported by replaceable wear rings that preserve hydraulic clearances.
What voltage supply and motor capacity operate this pumping assembly?
Powered by a 22 kW electric motor, the NB/125/250/262 connects to a 415 V three-phase feed and draws 42.2 Amps with an IP55 enclosure.
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