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SKU: 93209317
Grundfos NB 50-250/221 Cast Iron 2.2 kW End Suction Centrifugal Pump with Closed Impeller
Australia-Wide
(08) 9240 2992
Official Grundfos
Peace of Mind
Product Overview
Facility condenser water circuits and cooling manifold skids rely on the Grundfos NB 50-250/221 centrifugal pump. Fitted with a 2.2 kW motor, system piping interfaces through an axial DN 65 suction port and a radial DN 50 discharge flange.
Rated hydraulic performance generates 584 L/Min flow and reaches a maximum head limit of 13.61 m. Housing construction features cataphoretically coated EN-GJL-250 cast iron, accommodating a stainless steel impeller and a BQQE mechanical seal. Net weight measures 74 kg.
Operating from 415 V three-phase connections, the 2.2 kW drive requires 4.5 Amps nominal running current. 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 50 outlet.
External enclosure protection provides an IP55 environmental rating with Class F insulation materials. 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
- 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.
- Totally enclosed fan cooled IEC motor rated for S1 duty cycles in ambient environments up to 40°C.
SPECIFICATIONS
| Max Flow | 584 L/Min |
| Max Head | 13 m |
| Power | 2.2 kW / 415v |
| Rated Current | 4.5 Amps |
| Suitable For | Facility Fluid Transfer & Circulation |
| 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 mechanical seal type and internal clearances are fitted to this centrifugal pump assembly?
Clearance retention on the Grundfos NB 50-250/221 is achieved with replaceable wear rings, while a BQQE mechanical seal provides shaft fluid containment.
Which housing metallurgy and seal type ensure dependable fluid containment?
High-grade EN-GJL-250 cast iron forms the casing of the NB 50-250/221, housing a stainless steel impeller for lasting service.
What thermal operating boundaries and pressure limits govern this pump?
Operating boundaries for the NB-50-250-221 safely accommodate fluid temperatures from -25°C to 120°C and maximum system pressures up to 16 bar.
What connection flange sizes and port orientations apply to this pump casing?
The NB 50 250 221 features an axial 65 mm suction port and a radial 50 mm discharge port with standard PN16 flanged connections.
How much fluid discharge and dynamic lift can this pump sustain?
The NB/50/250/221 provides up to 584 L/Min in fluid flow and 13.61 m in dynamic head, depending on system pressure demands.
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