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SKU: 93209350
Grundfos NB 65-250/254 Cast Iron 5.5 kW End Suction Centrifugal Pump with Closed Impeller
Australia-Wide
(08) 9240 2992
Official Grundfos
Peace of Mind
Product Overview
Multi-zone hydronic circulation stations and plant manifolds use the Grundfos NB 65-250/254 end-suction pump. Fitted with a 5.5 kW motor, system piping interfaces through an axial DN 80 suction port and a radial DN 65 discharge flange.
Hydraulic output volume provides approx. 1357 L/Min fluid circulation across a approx. 22.6 m maximum head limit. Housing construction features cataphoretically coated EN-GJL-250 cast iron, accommodating a stainless steel impeller and a BQQE mechanical seal. Net weight measures 151 kg.
The unit draws 10.6 Amps from a 415 V three-phase electrical connection to generate 5.5 kW mechanical drive. 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.
Casing construction conforms to IP55 ingress requirements with Class F temperature 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
- Integral casing support feet provide direct anchoring to plant room inertia bases and plinths.
- Precision balanced rotating components reduce hydraulic noise and mechanical shaft deflection.
- Renewable casing wear rings retain pump efficiency and avoid direct volute casing wear.
- Solid shaft assembly with sealed ball bearings absorbs operational hydraulic and radial forces.
- EN1092-2 flanged connections conform to standard PN16 pipework dimensions.
- Continuous duty S1 rated electric drive motor operates in ambient temperatures up to 40°C.
- Back-pull-out layout permits motor and impeller servicing without breaking pipe connections.
SPECIFICATIONS
| Max Flow | 1357 L/Min |
| Max Head | 22.6 m |
| Power | 5.5 kW / 415v |
| Rated Current | 10.6 Amps |
| Suitable For | High-Capacity Plant Room Pumping |
| 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 maximum liquid flow and pressure elevation does this pump develop?
Operating delivery to 1357 L/Min in liquid flow and approx. 22.6 m in dynamic head, the Grundfos NB 65-250/254 accommodates diverse operating conditions.
How much running amperage and motor wattage drive this pumping unit?
Operating on a 415 V three-phase supply, the NB 65-250/254 utilizes a 5.5 kW motor drawing 10.6 Amps with IP55 weatherproof protection.
Which shaft sealing design and internal wear components maintain dependable fluid containment on this unit?
Dynamic sealing on the NB-65-250-254 incorporates a BQQE mechanical shaft seal and replaceable wear rings that retain internal clearances.
Which suction intake and discharge port dimensions connect this pump to facility pipework?
Standard PN16 flanged connections on the NB 65 250 254 include an axial 80 mm suction intake and a radial 65 mm discharge port.
What metal grades make up the volute casing and internal wetted parts?
Cast EN-GJL-250 iron with cataphoretic coating forms the housing of the NB/65/250/254, paired with a stainless steel runner for durability.
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