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SKU: 93209311
Grundfos NB 50-200/198 Cast Iron 15 kW End Suction Centrifugal Pump with Closed Impeller
Australia-Wide
(08) 9240 2992
Official Grundfos
Peace of Mind
Product Overview
Featuring an end-suction structural layout with DN 65 axial suction and DN 50 radial discharge ports, the NB 50-200/198 pump processes clean liquid media across active HVAC circuits. Powered by a 15 kW electric motor, the system operates across continuous commercial pumping cycles.
The hydraulic wet-end achieves a rated flow capacity of 1357 L/Min with a maximum head rating of 46.51 m. Cast iron housing materials provide solid pressure containment up to 16 bar. The internal assembly houses a stainless steel impeller fitted with bronze wear rings. Net equipment weight is 152 kg.
Power specifications for the NB 50-200/198 end-suction pump call for a 415 V three-phase electrical supply rated at 15 kW motor power. Current draw under load measures 29.1 Amps. Operating fluid temperatures span -25°C to 120°C with a maximum working pressure rating of 16 bar. The housing features DN 65 axial suction and DN 50 radial discharge ports.
The NB 50-200/198 electric motor carries an IP55 ingress protection rating alongside Class F thermal insulation and integrated PTC thermistors. System maintenance relies on back-pull-out architecture, enabling drive head disassembly while the pump volute stays secured to concrete foundation bases and pipe runs.
Features
- 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.
- Cataphoretic electrocoating on cast iron internal surfaces provides barrier protection against oxidative corrosion in hydronic circulation loops.
- Close-coupled configuration eliminates coupling alignment procedures and reduces overall installation footprint compared to long-coupled alternatives.
- Ball bearing support arrangement accommodates both radial and axial thrust loads generated during continuous duty operation at rated speed.
- PN16 flanged connection ratings on sizes up to and including DN 150 provide elevated working pressure capability beyond standard EN733 10 bar ratings.
- O-ring seal between pump housing and cover eliminates leakage risk at the volute-to-cover joint under sustained operating pressures.
IMPORTANT:Bulk freight charges apply. Please contact us for a freight quote before ordering.
SPECIFICATIONS
| Max Flow | 1357 L/Min |
| Max Head | 46.51 m |
| Power | 15 kW / 415v |
| Rated Current | 29.1 Amps |
| Suitable For | Commercial Building Services HVAC |
| Body Material | Cast Iron |
| Liquid Temperature | '-25°C to 120°C |
| Inlet Size | 65 mm |
| Outlet Size | 50 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.
In terms of metallurgical durability, what materials form the casing body and closed rotating runner?
Enduring baseplate construction in Grundfos NB 50-200/198 features an electrocoated cast iron shell with a precision-cast bronze impeller.
Under full mechanical load, what motor power rating, incoming feed, and running amps are listed?
The baseplate-mounted motor on NB 50-200/198 provides 15 kW of mechanical power, requiring a three-phase 415 V feed drawing 29.1 Amps.
Along district heating transmission pipework, which thermal limits and system pressures are rated?
Operating boundaries for NB-50-200-198 encompass liquid temperatures of -25°C to 120°C and maximum hydraulic pressures up to 10 bar.
To elevate hot water across multi-building facilities, what dynamic head does this pump generate?
Baseplate-mounted pump engineering allows NB 50 200 198 to achieve an operational dynamic lift of approximately 46.51 m.
Across municipal central distribution branches, what maximum flow capacity is certified for this unit?
In primary boiler plant manifolds, NB/50/200/198 maintains a peak volumetric throughput of approximately 1357 L/Min.
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