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SKU: 93209329
Grundfos NB 65-125/144 Cast Iron 11 kW End Suction Centrifugal Pump with Closed Impeller
Australia-Wide
(08) 9240 2992
Official Grundfos
Peace of Mind
Product Overview
Constructed for fixed foundation mounting in mechanical rooms, the NB 65-125/144 single-stage end-suction pump connects via DN 80 suction and DN 65 discharge ports. A 11 kW electric motor provides mechanical power for continuous water circulation across building service headers.
Fluid output parameters show a rated throughput of 2120 L/Min and a maximum head limit of 21.18 m. Electrocoating treatment on the cast iron casing limits rust in hydronic loops. The internal rotor holds a stainless steel impeller with bronze wear rings. Unit physical weight is 148 kg.
Operating on a 415 V three-phase power supply, the NB 65-125/144 electric motor yields 11 kW output power with a current draw of 21.5 Amps. Media temperature capabilities span from -25°C to 120°C under continuous line pressures up to 16 bar. Flanged ports feature DN 80 suction and DN 65 discharge sizing.
Winding insulation on the NB 65-125/144 motor complies with Class F standards within an IP55 dust and spray resistant motor housing equipped with PTC thermistors. Service procedures benefit from back-pull-out construction, permitting internal rotor disassembly without disconnecting main system pipework headers.
Features
- Close-coupled configuration eliminates coupling alignment procedures and reduces overall installation footprint compared to long-coupled alternatives.
- Ball bearing support arrangement accommodates both radial and axial thrust loads generated during continuous duty operation at rated speed.
- PN16 flanged connection ratings on sizes up to and including DN 150 provide elevated working pressure capability beyond standard EN733 10 bar ratings.
- O-ring seal between pump housing and cover eliminates leakage risk at the volute-to-cover joint under sustained operating pressures.
- Optimised impeller and volute hydraulics deliver unimpeded liquid flow through the pump casing, reducing internal turbulence losses.
- All stainless steel shaft construction provides improved corrosion resistance compared to carbon steel alternatives in wetted service areas.
- Mechanical shaft seal can be replaced without removing the impeller, system piping, pump volute casing or drive motor from the installation.
IMPORTANT:Bulk freight charges apply. Please contact us for a freight quote before ordering.
SPECIFICATIONS
| Max Flow | 2120 L/Min |
| Max Head | 21.18 m |
| Power | 11 kW / 415v |
| Rated Current | 21.5 Amps |
| Suitable For | High-Capacity Plant Room Pumping |
| 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.
What durable material selection is featured in the pressure casing and hydraulic closed runner?
The flanged end-suction wet end of Grundfos NB 65-125/144 combines an electrocoated cast iron volute with a precision-cast bronze impeller.
For centralized facility operation, what motor power, line voltage, and amp draw apply on site?
Motor engineering in NB 65-125/144 delivers 11 kW of mechanical power from a three-phase 415 V connection with a draw of 21.5 Amps.
Across circulating headers, what thermal operating limits and system working pressures are allowed on site?
Leak-free fluid containment is maintained by NB-65-125-144 across media temperatures of -25°C to 120°C and line pressures to 10 bar.
Through heavy cast volute passages, what maximum dynamic pressure column is generated?
Displacing fluid through central utility skids, NB 65 125 144 attains an operational dynamic head of approximately 21.18 m.
Providing high-output fluid momentum, what maximum flow rate is certified for this end-suction unit?
Through smooth internal casing passages, NB/65/125/144 sustains a peak flow volume of approximately 2120 L/Min.
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