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SKU: 93207140
Grundfos NB 125-250/236 Cast Iron 15 kW End Suction Centrifugal Pump with Closed Impeller
Australia-Wide
(08) 9240 2992
Official Grundfos
Peace of Mind
Product Overview
Basement pump room manifolds and secondary heating loops integrate the Grundfos NB 125-250/236 end-suction pump. The unit couples a 15 kW drive motor to an axial DN 150 inlet nozzle and a radial DN 125 discharge connection.
Operational liquid capacity reaches approx. 5520 L/Min fluid displacement with a developed head of approx. 18.4 m. Volute casing construction features EN-GJL-250 cast iron with cataphoretic electrocoating, paired with a stainless steel impeller and BQQE shaft seal. Product net weight equals 243 kg.
Hooking into a 415 V three-phase line, the motor draws 28.7 Amps to provide 15 kW rated mechanical output. Operating limits support liquid temperatures from -25°C to 120°C and maximum system pressures of 16 bar. Flanged pipework attaches via DN 150 inlet and DN 125 outlet ports.
Protective drive casing conforms to IP55 environmental standards with Class F insulation. Standard motor installation requires external electrical overload protection. The back-pull-out design allows complete drive and rotating assembly extraction while leaving the casing secured to distribution pipework.
Features
- 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.
- Standardized PN16 dimensions per EN1092-2 align with facility pipe headers.
- IEC standardized electric drive rated for continuous S1 operation in ambients up to 40°C.
SPECIFICATIONS
| Max Flow | 5520 L/Min |
| Max Head | 18.4 m |
| Power | 15 kW / 415v |
| Rated Current | 28.7 Amps |
| Suitable For | Industrial Process Water Loops |
| Body Material | Cast Iron |
| Liquid Temperature | -25°C to 120°C |
| Inlet Size | 150 mm |
| Outlet Size | 125 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 seal type and wear rings protect this pump against fluid loss?
Internal sealing on the Grundfos NB 125-250/236 utilizes a BQQE mechanical shaft seal and replaceable wear rings to prevent leakage and protect clearances.
What motor wattage and operating current power this pumping unit?
The NB 125-250/236 is driven by a 15 kW motor running on a 415 V three-phase supply, drawing approximately 28.7 Amps with IP55 protection.
What operating liquid temperature limits and line ratings apply to this pump?
The NB-125-250-236 safely accommodates pumped fluid temperatures from -25°C to 120°C under working pressure limits up to 16 bar.
Which inlet suction and outlet discharge port dimensions interface with building pipe manifolds?
Pipe connections on the NB 125 250 236 consist of an axial 150 mm inlet and a radial 125 mm outlet meeting PN16 flange standards.
What volumetric throughput and dynamic pressure does this pump provide?
Operating capacity on the NB/125/250/236 reaches approx. 5520 L/Min in liquid flow and approx. 18.4 m in dynamic head across duty cycles.
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