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SKU: 93209320
Grundfos NB 50-250/241 Cast Iron 3 kW End Suction Centrifugal Pump with Closed Impeller
Australia-Wide
(08) 9240 2992
Official Grundfos
Peace of Mind
Product Overview
Primary hydronic heating loops and central distribution risers feature the Grundfos NB 50-250/241 end-suction pump. Driven by an electric 3 kW motor assembly, the pump incorporates an axial DN 65 suction port and a radial DN 50 discharge connection.
Fluid volume delivery achieves approx. 860 L/Min rated circulation against a approx. 19.4 m maximum head. 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 84 kg.
With 415 V three-phase input, the electric motor draws 6.23 Amps rated current while providing 3 kW output. Operational limits permit media temperatures from -25°C to 120°C under working pressures up to 16 bar. Flanged pipe connections measure DN 65 on the inlet and DN 50 on the outlet.
Protective drive construction meets IP55 sealing standards alongside Class F 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 balancing of rotating parts delivers quiet, low-vibration fluid transfer.
- Heavy-section cast iron volute with integral mounting pads provides solid base support.
- Replaceable wear rings protect casing hydraulics and retain designed pumping clearances.
- Solid stub shaft and ball bearing arrangement counteracts operating mechanical stresses.
- Standardized PN16 dimensions per EN1092-2 align with facility pipe headers.
- IEC standardized electric drive maximum flow of continuous S1 operation in ambients up to 40°C.
- Back-pull-out arrangement allows fast access to motor and impeller without disturbing pipework.
SPECIFICATIONS
| Max Flow | 860 L/Min |
| Max Head | 19.4 m |
| Power | 3 kW / 415v |
| Rated Current | 6.23 Amps |
| Suitable For | Industrial Water Infrastructure |
| Body Material | Cast Iron |
| Liquid Temperature | -25°C to 120°C |
| Inlet Size | 65 mm |
| Outlet Size | 50 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 volumetric flow rating and head pressure does this pump offer?
Standard capacity to 860 L/Min in liquid flow and approx. 19.4 m in dynamic head, the Grundfos NB 50-250/241 accommodates diverse operating conditions.
What mechanical seal type and internal clearances maintain dependable fluid containment on this unit?
Fluid containment in the NB 50-250/241 is maintained by a BQQE mechanical shaft seal, supported by replaceable wear rings that preserve hydraulic clearances.
What media temperature limits and line pressure ratings are rated for this unit?
The NB-50-250-241 safely accommodates pumped fluid temperatures from -25°C to 120°C under working pressure limits up to 16 bar.
What connection flange sizes and port orientations are used on this pumping assembly?
Pipe connections on the NB 50 250 241 consist of an axial 65 mm inlet and a radial 50 mm outlet meeting PN16 flange standards.
What electrical line requirements and motor power govern this pump?
Driven across a 415 V three-phase supply, the NB/50/250/241 features a 3 kW motor drawing 6.23 Amps with an IP55 enclosure.
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