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SKU: 93209330
Grundfos NB 65-125/144 Cast Iron 1.1 kW End Suction Centrifugal Pump with Closed Impeller
Australia-Wide
(08) 9240 2992
Official Grundfos
Peace of Mind
Product Overview
Hydronic circulation skids across mechanical basements rely on the Grundfos NB 65-125/144 end-suction pump. Fitted with a 1.1 kW motor, system piping interfaces through an axial DN 80 suction port and a radial DN 65 discharge flange.
Discharge flow capacity achieves approx. 1279 L/Min operational delivery across a approx. 6.6 m maximum head. Housing construction features cataphoretically coated EN-GJL-250 cast iron, accommodating a stainless steel impeller and a BQQE mechanical seal. Net weight measures 53 kg.
Mechanical power of 1.1 kW is developed from a 415 V three-phase supply pulling 2.34 Amps 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 80 inlet and DN 65 outlet.
Electric motor framing conforms to IP55 environmental standards with Class F thermal insulation. 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
- 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.
- 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.
SPECIFICATIONS
| Max Flow | 1279 L/Min |
| Max Head | 6.6 m |
| Power | 1.1 kW / 415v |
| Rated Current | 2.34 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.
What mechanical design enables convenient servicing without disturbing pipework?
Simplified servicing on the Grundfos NB 65-125/144 features back-pull-out architecture, allowing motor and impeller removal without disconnecting pipework headers.
Can this pump handle broad temperature swings under full line pressure?
Operating boundaries for the NB 65-125/144 safely accommodate fluid temperatures from -25°C to 120°C and maximum system pressures up to 16 bar.
What mechanical seal type and internal clearances maintain internal hydraulic clearances on this unit?
The NB-65-125-144 utilizes a robust BQQE mechanical shaft seal and replaceable wear rings to prevent fluid loss and preserve internal clearances.
What three-phase power and running amperage does this motor draw?
Operating on a 415 V three-phase supply, the NB 65 125 144 utilizes a 1.1 kW motor drawing 2.34 Amps with IP55 weatherproof protection.
What peak liquid displacement and dynamic head does this unit provide?
Operating capacity on the NB/65/125/144 reaches approx. 1279 L/Min in liquid flow and approx. 6.6 m in dynamic head across duty cycles.
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