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SKU: 93209203
Grundfos NB 40-125/105 Cast Iron 1.5 kW End Suction Centrifugal Pump with Closed Impeller
Australia-Wide
(08) 9240 2992
Official Grundfos
Peace of Mind
Product Overview
Operating with a 1.5 kW motor rating, the NB 40-125/105 end-suction centrifugal pump features end-suction axial inlet (DN 65) and top radial outlet (DN 40) connections. The pump is specified for district heating, commercial air conditioning loops, and industrial water distribution.
The pump's hydraulic assembly yields 614 L/Min rated flow volume and a maximum operational head of 9.815 m. Structural strength relies on an EN-GJL-250 cast iron casing with cataphoresis coating. Internal hydraulics feature a stainless steel impeller and BQQE shaft seal. Physical product weight equals 47 kg.
The NB 40-125/105 pump's 415 V three-phase drive motor delivers 1.5 kW power output while drawing 5.49 Amps operating current. The pump accommodates circulating fluid temperatures from -25°C to 120°C under working pressures up to 16 bar. Standardized DN 65 suction and DN 40 discharge ports facilitate line placement.
An IP55 enclosure rating protects motor components on the NB 40-125/105 unit, backed by Class F insulation and built-in PTC thermistor sensors. Scheduled maintenance routines utilize back-pull-out access, enabling motor drive and impeller removal while leaving volute casing flange joints intact.
Features
- 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.
- Housing, impeller and wear ring use dissimilar material pairings to prevent galling and ensure no sticking elements during extended standby periods.
- High-efficiency motor selection is configured to match the specific power supply characteristics, pumping environment and liquid properties of each installation.
- Back pull-out design allows complete rotating assembly removal including motor, coupling and impeller without disturbing pump housing or connected pipework.
- EN733 and ISO2858 dimensional compliance ensures interchangeability with other standard end-suction pumps across commercial and industrial installations.
IMPORTANT:Bulk freight charges apply. Please contact us for a freight quote before ordering.
SPECIFICATIONS
| Max Flow | 614 L/Min |
| Max Head | 9.81 m |
| Power | 1.5 kW / 415v |
| Rated Current | 5.49 Amps |
| Suitable For | Boiler Plant & Thermal Transfer |
| Body Material | Cast Iron |
| Liquid Temperature | '-25°C to 120°C |
| Inlet Size | 65 mm |
| Outlet Size | 40 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 motor output rating, three phase line supply, and operational current govern this drive?
Full load running amperage for Grundfos NB 40-125/105 stands at 5.49 Amps from a three-phase 415 V supply to power its 1.5 kW motor.
Across regional heating mains, what media thermal spectrum and working line pressure are allowed?
Operating limits for circulating fluid temperatures in NB 40-125/105 span -25°C to 120°C, functioning safely up to 16 bar pressure.
Across primary plant room headers, how much dynamic discharge head can this pump provide?
Across primary hydronic distribution mains, NB-40-125-105 delivers a peak dynamic head rating of approximately 9.81 m.
Across regional heating mains, how many liters of fluid does this end-suction pump move?
Across regional heating mains, NB 40 125 105 sustains a maximum volumetric throughput of approximately 614 L/Min.
How are the pressure housing and internal fluid pathways protected against erosion over time?
The rigid casing structure of NB/40/125/105 incorporates an electrocoated EN-GJL-250 cast iron volute with a durable stainless steel impeller.
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