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SKU: 93209251
Grundfos NB 40-125/142 Cast Iron 5.5 kW End Suction Centrifugal Pump with Closed Impeller
Australia-Wide
(08) 9240 2992
Official Grundfos
Peace of Mind
Product Overview
Mechanical utility skids and central cooling loops incorporate the Grundfos NB 40-125/142 centrifugal pump. Fitted with a 5.5 kW motor, system piping interfaces through an axial DN 65 suction port and a radial DN 40 discharge flange.
Volumetric displacement achieves 765 L/Min rated discharge and overcomes up to 22.58 m total head. Housing construction features cataphoretically coated EN-GJL-250 cast iron, accommodating a stainless steel impeller and a BQQE mechanical seal. Net weight measures 101 kg.
With a 415 V three-phase electrical hookup, the 5.5 kW drive functions at an operating draw of 10.5 Amps. Fluid temperature capabilities range from -25°C to 120°C under working pressure limits up to 16 bar. Flange interfaces are dimensioned at DN 65 inlet and DN 40 outlet.
Mechanical housing protection achieves an IP55 rating combined with Class F insulation. External motor overload protection must be provided by the installer. The back-pull-out construction allows extraction of the motor and rotating components without disturbing suction or discharge pipe connections.
Features
- 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.
- Precision balanced rotating components reduce hydraulic noise and mechanical shaft deflection.
SPECIFICATIONS
| Max Flow | 765 L/Min |
| Max Head | 22 m |
| Power | 5.5 kW / 415v |
| Rated Current | 10.5 Amps |
| Suitable For | Industrial Process Water Loops |
| 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.
What motor output and running amperage are required to operate this unit?
Driven by a 5.5 kW motor, the Grundfos NB 40-125/142 operates across a 415 V three-phase supply, drawing 10.5 Amps with IP55 protection.
What internal wetted components protect this pump during constant fluid duty?
The NB 40-125/142 incorporates an electrocoated EN-GJL-250 cast iron casing and a stainless steel impeller for dependable operation.
What peak discharge rate and pumping head does this pump offer?
Operating capacity on the NB-40-125-142 reaches up to 765 L/Min in liquid flow and 22.58 m in dynamic head across duty cycles.
What shaft sealing mechanism and wear protection maintain internal hydraulic clearances on this unit?
Fluid containment in the NB 40 125 142 is maintained by a BQQE mechanical shaft seal, supported by replaceable wear rings that preserve hydraulic clearances.
How does this pump allow quick drive servicing in tight mechanical spaces?
Routine plant servicing is simplified on the NB/40/125/142 by its back-pull-out layout, allowing drive extraction without dismantling pipework.
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