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SKU: 93209349
Grundfos NB 65-250/232 Cast Iron 4 kW End Suction Centrifugal Pump with Closed Impeller
Australia-Wide
(08) 9240 2992
Official Grundfos
Peace of Mind
Product Overview
Cooling tower return lines and condenser fluid headers integrate the Grundfos NB 65-250/232 centrifugal pump. The unit couples a 4 kW drive motor to an axial DN 80 inlet nozzle and a radial DN 65 discharge connection.
Operational liquid delivery reaches 1034 L/Min rated throughput with a developed head of 15.76 m. Volute casing construction features EN-GJL-250 cast iron with cataphoretic electrocoating, paired with a stainless steel impeller and BQQE shaft seal. Product net weight equals 120 kg.
A three-phase feed of 415 V powers the 4 kW motor assembly with a rated draw of 8.47 Amps. Operating limits support liquid temperatures from -25°C to 120°C and maximum system pressures of 16 bar. Flanged pipework attaches via DN 80 inlet and DN 65 outlet ports.
Environmental protection design achieves an IP55 rating alongside Class F insulation. Standard motor installation requires external electrical overload protection. The back-pull-out design allows complete drive and rotating assembly extraction while leaving the casing secured to distribution pipework.
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 | 1034 L/Min |
| Max Head | 15 m |
| Power | 4 kW / 415v |
| Rated Current | 8.47 Amps |
| Suitable For | Boiler Plant & Thermal Transfer |
| Body Material | Cast Iron |
| Liquid Temperature | -25°C to 120°C |
| Inlet Size | 80 mm |
| Outlet Size | 65 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.
Which shaft sealing design and internal wear components are fitted to this centrifugal pump assembly?
Leak prevention along the drive shaft of the Grundfos NB 65-250/232 is delivered by a BQQE mechanical seal and replaceable hydraulic wear rings.
How much fluid displacement and vertical lift does this unit generate?
Delivering up to 1034 L/Min in volumetric flow and 15.76 m in dynamic head, the NB 65-250/232 adapts across its curve.
What power feed and operational current are needed for this motor drive?
Operating on a 415 V three-phase supply, the NB-65-250-232 utilizes a 4 kW motor drawing 8.47 Amps with IP55 weatherproof protection.
Which alloys and mechanical seals are fitted to this pump housing?
High-grade EN-GJL-250 cast iron forms the casing of the NB 65 250 232, housing a stainless steel impeller for lasting service.
What fluid temperature span and working line boundaries govern this pump?
Operating boundaries for the NB/65/250/232 safely accommodate fluid temperatures from -25°C to 120°C and maximum system pressures up to 16 bar.
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