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SKU: 93209289
Grundfos NB 40-315/336 Cast Iron 45 kW End Suction Centrifugal Pump with Closed Impeller
Australia-Wide
(08) 9240 2992
Official Grundfos
Peace of Mind
Product Overview
The NB 40-315/336 end-suction centrifugal pump incorporates a 45 kW electric drive motor connected to DN 65 suction and DN 40 discharge flanged piping joints. Designed for continuous building service duty, the unit handles clean fluid movement across commercial plant installations.
Hydraulic rating calculations confirm a flow capacity of 784 L/Min at a maximum head threshold of 135.5 m. The volute housing is constructed from cataphoresis treated cast iron. Rotor hydraulics feature a stainless steel impeller supported by bronze wear rings. Total net weight measures 526 kg.
Motor electrical configuration on the NB 40-315/336 pump requires a 415 V three-phase connection rated at 45 kW output power. Operating current measures 79.7 Amps at nominal speed. Liquid temperature ranges extend from -25°C to 120°C under 16 bar pressure. Connection is made via DN 65 inlet and DN 40 outlet flanges.
Motor security on the NB 40-315/336 end-suction pump features an IP55 rated housing, Class F thermal insulation, and PTC thermistor winding relays. The back-pull-out structural geometry permits technicians to remove the motor drive and rotor without dismantling connected suction or discharge pipe headers.
Features
- 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.
- ATEX Zone 1, 2, 21 or 22 certification available for operation in potentially explosive atmospheres (except E-model variants).
- Integrally cast suction and discharge ports with dedicated vent and drain ports provide direct connection points without additional fittings.
- No baseplate or grouting required to maintain correct shaft alignment and vibration levels within Hydraulic Institute standards.
IMPORTANT:Bulk freight charges apply. Please contact us for a freight quote before ordering.
SPECIFICATIONS
| Max Flow | 784 L/Min |
| Max Head | 135.5 m |
| Power | 45 kW / 415v |
| Rated Current | 79.7 Amps |
| Suitable For | Commercial Building Services HVAC |
| 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.
With baseplate mounting geometry, what structural metals form the pressure-retaining wet end?
Featuring a foot-mounted EN-GJL-250 cast iron volute, Grundfos NB 40-315/336 is fitted with a precision-cast bronze impeller.
With a high-power induction motor, what power rating, incoming voltage, and amps are specified?
Powered by a foot-mounted electric motor rated at 45 kW, NB 40-315/336 operates on a three-phase 415 V line drawing 79.7 Amps.
With baseplate mounting geometry, what media temperature range and containment pressure are rated?
Thermal tolerance allows NB-40-315-336 to accommodate circulating liquid temperatures of -25°C to 120°C under working pressures up to 16 bar.
With heavy foot-supported volute geometry, what maximum dynamic lift does this pump produce?
Operating against intense system hydraulic backpressure, NB 40 315 336 delivers an operational head of approximately 135.5 m.
In metropolitan heating networks, what peak volumetric flow rate can this end-suction pump maintain?
Under smooth full-speed pumping conditions, NB/40/315/336 attains a peak volumetric circulation of approximately 784 L/Min.
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