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SKU: 93209352
Grundfos NB 65-315/261 Cast Iron 5.5 kW End Suction Centrifugal Pump with Closed Impeller
Australia-Wide
(08) 9240 2992
Official Grundfos
Peace of Mind
Product Overview
Primary heating distribution networks and boiler transfer lines feature the Grundfos NB 65-315/261 end-suction pump. Coupled to a 5.5 kW motor drive, fluid enters through an axial DN 80 suction port and exits through a radial DN 65 discharge flange.
Volumetric flow capacity achieves 1047 L/Min fluid displacement with a 20.42 m maximum head parameter. Constructed with an EN-GJL-250 cast iron volute protected by cataphoretic electrocoating, internal hydraulics feature a stainless steel impeller and BQQE mechanical shaft seal. Net weight is 152 kg.
Supplied by a 415 V three-phase source, the electric drive draws 10.6 Amps to produce 5.5 kW shaft power. Working tolerances accommodate fluid temperatures spanning -25°C to 120°C at pressures reaching 16 bar. Flanged connections feature DN 80 inlet and DN 65 outlet dimensions.
Drive housing layout incorporates an IP55 ingress rating with Class F insulation. Because built-in thermal protection is not included, external motor overload protection must be supplied. Maintenance is streamlined via a back-pull-out arrangement allowing rotating element removal while the casing remains connected to piping.
Features
- 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.
- 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.
SPECIFICATIONS
| Max Flow | 1047 L/Min |
| Max Head | 20 m |
| Power | 5.5 kW / 415v |
| Rated Current | 10.6 Amps |
| Suitable For | Commercial Building Services HVAC |
| 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 electrical supply parameters and line current run this motor?
Electric drive for the Grundfos NB 65-315/261 delivers 5.5 kW from a 415 V three-phase supply, drawing 10.6 Amps with IP55 protection.
Which suction intake and discharge port dimensions are integrated into the pump housing?
Standard PN16 flanged connections on the NB 65-315/261 include an axial 80 mm suction intake and a radial 65 mm discharge port.
How hot can operating media be under rated working line pressure?
The NB-65-315-261 safely accommodates pumped fluid temperatures from -25°C to 120°C under working pressure limits up to 16 bar.
What peak fluid delivery and vertical head does this unit provide?
The NB 65 315 261 provides up to 1047 L/Min in fluid flow and 20.42 m in dynamic head, depending on system pressure demands.
Can technicians replace the shaft seal without breaking suction and discharge flanges?
Plant maintenance on the NB/65/315/261 leaves facility pipework connected, utilizing a back-pull-out layout for fast mechanical servicing.
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