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SKU: 93209334
Grundfos NB 65-160/157 Cast Iron 11 kW End Suction Centrifugal Pump with Closed Impeller
Australia-Wide
(08) 9240 2992
Official Grundfos
Peace of Mind
Product Overview
The NB 65-160/157 single-stage end-suction pump operates on a 415 V three-phase supply rated at 11 kW drive power. Built with an axial inlet port (DN 80) and top radial outlet port (DN 65), the unit connects into commercial hydronic heating networks, cooling tower water loops, and facility fluid transfer lines.
Under full duty load, the pump generates 1732 L/Min rated flow capacity and reaches a maximum head threshold of 27.41 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 145 kg.
Drive power on the NB 65-160/157 pump comes from a 11 kW electric motor operating on a 415 V three-phase electrical connection. Full-load running current measures 21.5 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 80 suction and DN 65 discharge flanges.
Built with an IP55 rated motor enclosure and Class F insulation, the NB 65-160/157 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
- 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 | 1732 L/Min |
| Max Head | 27.41 m |
| Power | 11 kW / 415v |
| Rated Current | 21.5 Amps |
| Suitable For | District Heating & Cooling Networks |
| 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.
During sub-zero liquid circulation, what media temperature spectrum and line pressure are rated for this casing?
Broad thermal cycling across -25°C to 120°C is supported by Grundfos NB 65-160/157 with maximum system pressure retention up to 16 bar.
Within municipal central energy plants, what total dynamic head rating is maintained on site?
Centrifugal hydraulic power in NB 65-160/157 enables it to achieve a dynamic head of approximately 27.41 m.
Under full electrical frequency, what peak volumetric liquid throughput is achieved across mains?
Radial discharge hydraulics in NB-65-160-157 provide a maximum volumetric flow rate of approximately 1732 L/Min.
Which structural metals provide rigidity for this flanged baseplate-mounted pump?
Mechanical durability across ongoing schedules is provided in NB 65 160 157 by a cast iron shell and a precision-cast bronze impeller.
To power this large electric motor, what electrical voltage, kilowatts, and current are required?
Connected to a three-phase 415 V line, NB/65/160/157 operates its 11 kW motor drive with an amp rating of 21.5 Amps.
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