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SKU: 93207123
Grundfos NB 100-250/245 Cast Iron 11 kW End Suction Centrifugal Pump with Closed Impeller
Australia-Wide
(08) 9240 2992
Official Grundfos
Peace of Mind
Product Overview
Core chilled water risers and secondary coil feeds feature the Grundfos NB 100-250/245 centrifugal pump. Coupled to a 11 kW motor drive, fluid enters through an axial DN 125 suction port and exits through a radial DN 100 discharge flange.
Operational fluid delivery reaches approx. 3472 L/Min maximum volume and develops a maximum head of approx. 20.6 m. 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 232 kg.
Electric motor operation on a 415 V three-phase feed requires 22.3 Amps running current for 11 kW. Working tolerances accommodate fluid temperatures spanning -25°C to 120°C at pressures reaching 16 bar. Flanged connections feature DN 125 inlet and DN 100 outlet dimensions.
Physical housing engineering complies with IP55 enclosure criteria and Class F winding 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
- Back-pull-out construction allows drive and impeller removal without disconnecting suction or discharge lines.
- Precision balanced rotor and runner assemblies minimize operating vibration across all pump speeds.
- Cast iron volute casing with integral mounting feet absorbs hydraulic forces and pipework stresses.
- Replaceable wear rings retain correct internal hydraulic clearances over long operating periods.
- Solid stub shaft configuration supported by deep groove ball bearings absorbs axial thrust loads.
- Standardized EN1092-2 PN16 flange dimensions match standard commercial and district pipe manifolds.
- High-efficiency IEC electric drive motor rated for S1 continuous operation in ambient conditions up to 40°C.
SPECIFICATIONS
| Max Flow | 3472 L/Min |
| Max Head | 20.6 m |
| Power | 11 kW / 415v |
| Rated Current | 22.3 Amps |
| Suitable For | Facility Fluid Transfer & Circulation |
| Body Material | Cast Iron |
| Liquid Temperature | -25°C to 120°C |
| Inlet Size | 125 mm |
| Outlet Size | 100 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 shaft seal and wear ring components provide dependable fluid containment along the shaft?
Dynamic sealing in the Grundfos NB 100-250/245 is maintained by a BQQE mechanical shaft seal and replaceable wear rings that retain hydraulic clearances.
How much fluid throughput and dynamic head can this unit sustain?
Delivering approx. 3472 L/Min in volumetric flow and approx. 20.6 m in dynamic head, the NB 100-250/245 adapts across its curve.
What electrical connection and motor rating are needed for this pump?
Operating on a 415 V three-phase supply, the NB-100-250-245 utilizes a 11 kW motor drawing 22.3 Amps with IP55 weatherproof protection.
Can this pump handle high-temperature loops under rated working pressure?
Working limits on the NB 100 250 245 accommodate fluid temperatures from -25°C to 120°C with maximum system pressures reaching 16 bar.
Which inlet suction and outlet discharge port dimensions are integrated into the pump housing?
Standard PN16 flanged connections on the NB/100/250/245 include an axial 125 mm suction intake and a radial 100 mm discharge port.
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