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SKU: 93209286
Grundfos NB 40-315/305 Cast Iron 4 kW End Suction Centrifugal Pump with Closed Impeller
Australia-Wide
(08) 9240 2992
Official Grundfos
Peace of Mind
Product Overview
Central hydronic headers and secondary heating risers incorporate the Grundfos NB 40-315/305 centrifugal pump. Driven by an electric 4 kW motor assembly, the pump incorporates an axial DN 65 suction port and a radial DN 40 discharge connection.
Liquid transfer output attains 370 L/Min flow volume and develops a 23.54 m maximum head rating. The pump housing is cast in EN-GJL-250 iron with cataphoretic electrocoating. Fluid displacement is driven by a stainless steel impeller and a BQQE mechanical shaft seal. Net product weight measures 130 kg.
Under a 415 V three-phase electrical supply, the motor draws 8.47 Amps to produce 4 kW power. Operational limits permit media temperatures from -25°C to 120°C under working pressures up to 16 bar. Flanged pipe connections measure DN 65 on the inlet and DN 40 on the outlet.
Drive enclosure specifications feature IP55 ingress protection and Class F thermal insulation. Standard IEC electric drive design requires external motor overload protection. The back-pull-out structural layout permits complete motor and rotating assembly extraction without disconnecting piping headers.
Features
- Back-pull-out construction allows drive and impeller removal without disconnecting suction or discharge lines.
- Precision balanced rotor and runner assemblies minimize operating vibration across all pump speeds.
- Cast iron volute casing with integral mounting feet absorbs hydraulic forces and pipework stresses.
- Replaceable wear rings retain correct internal hydraulic clearances over long operating periods.
- Solid stub shaft configuration supported by deep groove ball bearings absorbs axial thrust loads.
- Standardized EN1092-2 PN16 flange dimensions match standard commercial and district pipe manifolds.
- High-efficiency IEC electric drive motor rated for S1 continuous operation in ambient conditions up to 40°C.
SPECIFICATIONS
| Max Flow | 370 L/Min |
| Max Head | 23 m |
| Power | 4 kW / 415v |
| Rated Current | 8.47 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 mechanical shaft seal and internal components are fitted to this centrifugal pump assembly?
Mechanical sealing on the Grundfos NB 40-315/305 utilizes a heavy-duty BQQE shaft seal and replaceable wear rings to prevent fluid loss.
What electrical input and running current operate this pump motor?
Powered by a 4 kW electric motor, the NB 40-315/305 connects to a 415 V three-phase feed and draws 8.47 Amps with an IP55 enclosure.
What materials comprise the wetted hydraulic parts and mechanical seal?
The NB-40-315-305 incorporates an electrocoated EN-GJL-250 cast iron casing and a stainless steel impeller for dependable operation.
How much water movement and vertical elevation does this unit generate?
Operating capacity on the NB 40 315 305 reaches up to 370 L/Min in liquid flow and 23.54 m in dynamic head across duty cycles.
Which inlet and outlet port sizes are used on this pumping assembly?
Standard PN16 flanged connections on the NB/40/315/305 include an axial 65 mm suction intake and a radial 40 mm discharge port.
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