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SKU: 93209283
Grundfos NB 40-315/273 Cast Iron 22 kW End Suction Centrifugal Pump with Closed Impeller
Australia-Wide
(08) 9240 2992
Official Grundfos
Peace of Mind
Product Overview
The NB 40-315/273 single-stage end-suction pump operates on a 415 V three-phase supply rated at 22 kW drive power. Built with an axial inlet port (DN 65) and top radial outlet port (DN 40), the unit connects into commercial hydronic heating networks, cooling tower water loops, and facility fluid transfer lines.
Under full duty load, the pump generates 593 L/Min rated flow capacity and reaches a maximum head threshold of 81.64 m. The heavy volute housing uses electrocoated cast iron to resist internal corrosion. A stainless steel impeller rotor assembly with bronze wear rings drives fluid transfer. Net product weight equals 260 kg.
Drive power on the NB 40-315/273 pump comes from a 22 kW electric motor operating on a 415 V three-phase electrical connection. Full-load running current measures 40.8 Amps. The pump processes liquid media over temperatures from -25°C to 120°C under line pressures up to 16 bar. Pipe connections use DN 65 suction and DN 40 discharge flanges.
Built with an IP55 rated motor enclosure and Class F insulation, the NB 40-315/273 electric motor incorporates internal PTC thermistor sensors against overheating. Servicing is simplified by the back-pull-out structural layout, enabling complete rotor and drive removal without disconnecting suction or discharge pipe joints.
Features
- 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.
- Housing, impeller and wear ring use dissimilar material pairings to prevent galling and ensure no sticking elements during extended standby periods.
IMPORTANT:Bulk freight charges apply. Please contact us for a freight quote before ordering.
SPECIFICATIONS
| Max Flow | 593 L/Min |
| Max Head | 81.64 m |
| Power | 22 kW / 415v |
| Rated Current | 40.8 Amps |
| Suitable For | Cooling Tower Hydronic Systems |
| 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.
What liquid thermal operating boundaries and working pressure ratings govern this heavy volute casing?
Operating safely in district heating applications, Grundfos NB 40-315/273 handles media temperatures between -25°C to 120°C at pressures reaching 10 bar.
To conquer high system backpressure, how far upward can this heavy centrifugal unit drive fluid?
To elevate hot water across tall institutional risers, NB 40-315/273 achieves a peak dynamic head of approximately 81.64 m.
Circulating water across massive primary headers, what peak delivery flow rate can be expected?
Through heavy plant room transmission piping, NB-40-315-273 circulates an operational liquid volume of approximately 593 L/Min.
What protective treatment and internal alloy selection prevent corrosion across the wet end passages?
The physical architecture of NB 40 315 273 integrates an EN-GJL-250 cast iron pressure volute with a precision-cast bronze impeller.
What supply voltage configuration, motor kilowatt capacity, and full load current are specified?
The heavy drive motor in NB/40/315/273 delivers 22 kW of rotational power on a three-phase 415 V feed, pulling 40.8 Amps.
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