Grundfos NB/NBG/NK/NKG End-Suction Horizontal Single-Stage Pumps
Grundfos offers an almost limitless range of close-coupled (NB/NBG) and long-coupled (NK/NKG) end-suction pumps, whose robustness and reliability make them ideal for use in even the most demanding environments. Despite their sturdy build and solid appearance, the Grundfos end-suction pumps have been carefully optimised and refined over the years to offer unsurpassed energy efficiency and performance as well as amazing flexibility. Made from cast iron and designed to work hard in demanding environments where only the fittest pumps survive, this range features IE3 and IE2 motors as standard configurations, and when delivered with integrated frequency converter (MGE), maximum efficiency is ensured throughout all operating hours.
As an authorized Grundfos Water Pump Dealer in Dubai, we supply the complete NB/NBG/NK/NKG range with genuine warranty and technical support across the UAE.
Technical Specifications
| Parameter | NB | NK | NBG | NKG |
|---|---|---|---|---|
| Flow (max.) | 1100 m³/h | 1500 m³/h | 1100 m³/h | 1500 m³/h |
| Head (max.) | 105 m | 150 m | 150 m | 150 m |
| Liquid Temperature | 0°C to +140°C | 0°C to +140°C | 0°C to +140°C | 0°C to +140°C |
| Max. Pressure | 10/16 bar (1600 kPa) | 10/16 bar (1600 kPa) | 16 bar (1600 kPa) | 16 bar (1600 kPa) |
General Specifications
| Parameter | Specification |
|---|---|
| Pump Type | End-suction, horizontal, single-stage |
| Construction | Cast iron (stainless steel variants available) |
| Frequency | 50/60 Hz |
| Motor Poles | 2-pole, 4-pole, 6-pole |
| Power Range | 0.75 – 462 kW |
| Flange Ratings | 10 bar and 16 bar |
| Standards | EN733 and ISO2858 compliant |
Model Range Comparison
Close-Coupled Pumps (NB/NBG)
| Model | Description | Coupling | Max Flow | Max Head |
|---|---|---|---|---|
| NB | Close-coupled, standard | Direct motor coupling | 1100 m³/h | 105 m |
| NBG | Close-coupled, glanded | Direct motor coupling | 1100 m³/h | 150 m |
Long-Coupled Pumps (NK/NKG)
| Model | Description | Coupling | Max Flow | Max Head |
|---|---|---|---|---|
| NK | Long-coupled, standard | Flexible coupling | 1500 m³/h | 150 m |
| NKG | Long-coupled, glanded | Flexible coupling | 1500 m³/h | 150 m |
Performance Overview (60 Hz – NKG Example)
| Flow Range (m³/h) | Head Range (m) |
|---|---|
| 20-40 | 100-150 |
| 40-100 | 60-100 |
| 100-200 | 40-80 |
| 200-400 | 20-60 |
| 400-1000 | 10-40 |
| 1000-1500 | 5-20 |
| 1500-2000 | 3-10 |
Key Features
NB/NBG Close-Coupled Design
| Feature | Benefit |
|---|---|
| Close-Coupled Design | No alignment needed |
| All-Stainless Steel Stub-Shaft | Improved corrosion resistance |
| Motor Supports | Easy installation (included above 7.5 kW) |
| O-Ring Seal | No risk of leakage between housing and cover |
| Optimised Hydraulics | EuP Directive 2009/125/EC [MEI] ready |
NK/NKG Long-Coupled Design
| Feature | Benefit |
|---|---|
| All-Stainless Steel Shafts | Improved corrosion resistance |
| Standard & Heavy Duty Bearings | Meet various lifetime demands |
| Single & Double Seal Versions | Handle numerous liquid types |
| O-Ring Seal | No risk of leakage between housing and cover |
| Optimised Hydraulics | EuP Directive 2009/125/EC [MEI] ready |
Grundfos Blueflux® Motor Technology
| Feature | Specification |
|---|---|
| Motor Efficiency Classes | IE2, IE3, IE4 |
| MGE Option | Integrated frequency converter |
| Compliance | Meets or exceeds international efficiency legislation |
| Benefit | Best-in-class motor solution for performance and energy consumption |
Seal Options
| Seal Type | Application |
|---|---|
| Single Mechanical Seal | Standard liquid handling |
| Double Mechanical Seal | Hazardous or demanding liquids |
| Various Seal Materials | For different liquid compatibility |
Flange Options
| Pressure Rating | Standards | Application |
|---|---|---|
| 10 bar | EN733, ISO2858 | Standard pressure applications |
| 16 bar | EN733, ISO2858 | High pressure applications |
Applications
Water Supply
- Municipal water distribution
- Water treatment plants
- Pumping stations
- Reservoir systems
Heating/District Heating
- Central heating systems
- District heating networks
- Hot water circulation
- Building HVAC systems
Industrial Pressure Boosting
- Manufacturing processes
- Industrial water supply
- Process water systems
- Wash-down systems
Industrial Liquid Transfer
- Chemical transfer
- Process fluid handling
- Cooling systems
- General liquid transfer
Air-Conditioning
- Chilled water circulation
- HVAC systems
- Building cooling
- Data centre cooling
District Cooling
- Chilled water networks
- Central cooling plants
- Commercial cooling systems
- Industrial cooling
Irrigation
- Agricultural irrigation
- Landscape watering
- Golf course irrigation
- Sports turf systems
Benefits Summary
Energy Efficiency
| Benefit | Description |
|---|---|
| Blueflux® Technology | Best-in-class motor efficiency |
| IE2/IE3/IE4 Motors | Meet/exceed efficiency standards |
| MGE Option | Integrated VFD for maximum efficiency |
| Optimised Hydraulics | EuP Directive compliant |
Reliability
| Benefit | Description |
|---|---|
| Comprehensive Know-How | Decades of pump engineering expertise |
| Selected Materials | Carefully chosen for durability |
| Cast Iron Construction | Built for demanding environments |
| Outstanding Reputation | Renowned for reliability |
Complete Range
| Benefit | Description |
|---|---|
| Close-Coupled | NB/NBG series |
| Long-Coupled | NK/NKG series |
| Cast Iron | Standard construction |
| Stainless Steel | Available for corrosive applications |
Flexibility
| Benefit | Description |
|---|---|
| Configuration Options | Customizable for any application |
| Motor Options | 2, 4, 6-pole; IE2/IE3/IE4; MGE |
| Seal Options | Single or double mechanical seals |
| Flange Options | 10 bar or 16 bar ratings |
Demanding Environments
| Benefit | Description |
|---|---|
| Robust Design | Handle demanding liquids |
| Corrosion Resistance | Stainless steel variants available |
| Temperature Range | 0°C to +140°C |
| Pressure Capability | Up to 16 bar |
Selection Guide
| Application | Recommended Model | Reason |
|---|---|---|
| Compact installation | NB/NBG | No alignment, smaller footprint |
| High flow requirements | NK/NKG | Up to 1500 m³/h capacity |
| High head requirements | NBG/NK/NKG | Up to 150 m head |
| Standard pressure | NB/NK | 10/16 bar flange options |
| High pressure only | NBG/NKG | 16 bar flange standard |
| Hot liquid transfer | All models | Up to +140°C |
| Corrosive liquids | Stainless variants | Improved corrosion resistance |
Motor Pole Selection
| Pole Configuration | Speed (50 Hz) | Application |
|---|---|---|
| 2-pole | 2900 rpm | High head, lower flow |
| 4-pole | 1450 rpm | Medium head and flow |
| 6-pole | 960 rpm | High flow, lower head |
Why Choose Grundfos NB/NBG/NK/NKG?
Optimised Perfection
Over years of refinement, these end-suction pumps offer unsurpassed energy efficiency and performance—the result of combining tradition with forward thinking.
Survival of the Fittest
Built from cast iron to work hard in demanding environments, these pumps handle whatever runs through the pipes effortlessly—only the fittest survive.
Blueflux® Motor Technology
Grundfos Blueflux® label represents the very best in energy-efficient motor technology, meeting or exceeding international efficiency legislation.
Complete Flexibility
Configure and optimize for seamless operation in any application with options for coupling type, seal type, motor efficiency class, and flange rating.
Stainless Steel Options
For applications with high corrosion risk, a range of stainless steel NB/NK variants provides enhanced protection.
Global Support
As a truly global supplier, Grundfos offers delivery, service, and commissioning expertise on every continent.
Grundfos Accessories & Parts
Maintain optimal NB/NBG/NK/NKG performance with original components including mechanical seals (single and double), impellers, wear rings, O-ring seal kits, bearing assemblies, shaft sleeves, coupling elements, motor supports, gasket sets, and pump covers. We stock replacement parts for all models across the complete power range.
Select Grundfos Pumps
Browse our complete inventory of Grundfos NB, NBG, NK, and NKG end-suction pumps. As Grundfos Pump Suppliers in Dubai, we provide competitive pricing, technical consultation, system sizing support, and prompt delivery across Dubai, Sharjah, Abu Dhabi, Ajman, and all UAE locations.
Contact us for:
- Model selection based on flow and head requirements
- Close-coupled vs long-coupled recommendations
- Motor efficiency class selection (IE2/IE3/IE4/MGE)
- Seal type recommendations for your liquid
- Cast iron vs stainless steel material selection
- Competitive quotations
- Delivery schedules
Optimised Perfection for Any Application
The Grundfos NB/NBG/NK/NKG range delivers end-suction horizontal single-stage pumping with flows up to 1500 m³/h, heads up to 150 metres, power from 0.75 to 462 kW, liquid temperatures from 0°C to +140°C, and pressures up to 16 bar. Featuring Grundfos Blueflux® motor technology (IE2/IE3/IE4/MGE), optimised pump hydraulics meeting EuP Directive 2009/125/EC, all-stainless steel shafts for corrosion resistance, O-ring sealed housings for leak-free operation, single or double mechanical seals for various liquids, and EN733/ISO2858 compliant 10/16 bar flanges—these pumps provide unsurpassed performance in water supply, heating, industrial boosting, liquid transfer, air-conditioning, district cooling, and irrigation applications.