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Description
Grundfos — World's Largest Pump Manufacturer · Bjerringbro, Denmark
97839750 · End-Suction Close-Coupled Pump
The Grundfos 97839750 (NB 65-125/121 AAF2AESBAQEGX4) is a End-Suction Close-Coupled Pump. End-suction close-coupled pumps compliant with EN733 for HVAC and water supply. Nominal performance: 271US gpm at 15.42ft. Rated 440-480YV, 3.0-Phase, 60 Hz. Applications include HVAC: Air Conditioning, Industrial heating.
Power
1.5HP
Voltage
440-480YV
Phase
3.0-Phase
Max Flow
271US gpm
Max Head
15.42ft
Max Pressure
232.06psi
Grundfos
World's largest pump manufacturer — engineering and manufacturing in 17 countries since 1945
Industrial Grade
IE3 / NEMA Premium motor — reduces operating cost over service life
Authorized Distributor
Genuine Grundfos product — full manufacturer warranty coverage
Expert Support
Technical help available — call (781) 281-8905 or chat
Why This Product
Genuine Grundfos Part
OEM component engineered and manufactured to Grundfos specifications. Maintains pump performance and warranty coverage.
Full Traceability
Genuine Grundfos parts carry manufacturer traceability from production through delivery. No counterfeit risk.
Authorized Source
PumpStop is an authorized Grundfos distributor. All parts are genuine — not aftermarket, not surplus.
Confirm Compatibility
Always verify part number against your pump model number and serial number before ordering. Contact PumpStop for parts identification assistance.
Technical Support Available
PumpStop technical team can identify correct parts from pump nameplate data, serial number, or model code. Call (781) 281-8905 or chat.
Contact for Availability
Parts availability varies. Contact PumpStop to confirm stock, lead time, and pricing before placing an order.
Model Information — 97839750
Series: NB
Impeller Material: Cast iron
Housing Material: Cast iron
Shaft Seal: BAQE
Flange Rating: PN 16
Technical Specifications
| Model Number | 97839750 |
| Product Series | NB |
| Series Description | End-Suction Close-Coupled Pump |
| Power | 1.5HP |
| Voltage | 440-480YV |
| Phase | 3.0-Phase |
| Frequency | 60 Hz |
| Motor Speed | 1750rpm |
| Full Load Current | 2.15A |
| Motor Type | INNOMOTICS |
| Motor Efficiency Class | IE3 / NEMA Premium |
| Motor Efficiency | IE3 86,5% |
| Insulation Class | F |
| Protection Class (IP) | TEFC |
| Nominal Flow | 271US gpm |
| Nominal Head | 15.42ft |
| Max Operating Pressure | 232.06psi |
| Max Fluid Temperature | 248°F |
| Max Ambient Temperature | 131°F |
| Inlet Connection | DN 80 |
| Outlet Connection | DN 65 |
| Pipe Pressure Rating | PN 16 |
| Pipe Standard | EN 1092-2 |
| Impeller Material | Cast iron |
| Housing Material | Cast iron |
| Shaft Seal | BAQE |
| Impeller Nominal Diameter | 4.92in |
Applications
HVAC: Air Conditioning
Industrial heating
Important Notices
| Electrical | Verify supply voltage, phase, and frequency match nameplate before installation: 440-480YV, 3.0-Phase, 60 Hz. |
| Temperature limits | Do not exceed max fluid temperature 248°F or max ambient temperature 131°F. Exceeding limits damages seals and motor insulation. |
| Dry running | Do not run dry. NB pumps use the pumped fluid to lubricate the shaft seal. Dry running destroys the seal within seconds. Install dry-run protection on all automatic installations. |
| Maintenance | Refer to the Grundfos Installation and Operating Manual (IOM) for correct installation, commissioning, and maintenance. Contact PumpStop for documentation. |
Documentation
✓ Installation and Operating Manual (IOM) — NB Series
✓ Product Data Sheet — 97839750
✓ Service Manual and Spare Parts List
Need the IOM, data sheet, or spare parts list? Contact PumpStop and we'll send it over.
Before You OrderConfirm model code, voltage, phase, and frequency match your installation. For sizing help, spare parts, or documentation, call (781) 281-8905 or chat with PumpStop.
- EAN
- 5710625524274
- Actual impeller diameter
- 4.76 in
- Bearing insulation type N-end
- N
- Bearing lubrication
- Grease
- Built-in motor protection
- NONE
- Code for rubber
- E
- Code for shaft seal
- BAQE
- Connect code
- F2
- Connection
- PN 16
- Curve tolerance
- ISO9906:2012 3B2
- Density
- 62.29 lb/ft³
- Diameter
- 0.94 in
- DOE Pump Energy Index CL
- 0.96
- DOE Pump Energy Index VL
- 0
- Enclosure class (IEC 34-5)
- IP55
- Frequency converter
- NONE
- Gross weight
- 135.0 lb
- Housing
- Cast iron
- IE efficiency
- IE3 86
- IE Efficiency class
- IE3 / NEMA Premium
- Impeller
- Cast iron
- Insulation class (IEC 85)
- F
- Internal pump house coating
- CED
- Language on pump nameplate
- GB
- Liquid temperature range
- 32 .. 248 °F
- Mains frequency
- 60 Hz
- Material code
- A
- Material Pricing Group
- 56
- Maximum ambient temperature
- 131 °F
- Maximum operating pressure
- 16 bar
- Minimum efficiency index, MEI ≥
- 0.7
- Motor efficiency at 1/2 load
- 84.2-84.2 %
- Motor efficiency at 3/4 load
- 86.4-86.4 %
- Motor efficiency at full load 1
- 86.5-86.5 %
- Motor type
- SIEMENS
- Mount. design. acc. IEC 34-7
- IM V1
- Net weight
- 112.0 lb
- Number of poles
- 4
- Pipe connection standard
- EN 1092-2
- Power factor 1
- 0.75
- Pressure rating for connection
- PN 16
- Pressure sensor
- N
- Pump housing
- Cast iron
- Pump speed on which pump data are based
- 1750 rpm
- Pump version
- A
- Pumped liquid
- Water
- Rated current
- 2.15 A
- Rated flow
- 271 US gpm
- Rated head
- 15.42 ft
- Rated power - P2
- 1.1 kW
- Rated speed
- 1750 rpm
- Rated voltage
- 3 x 440-480Y V
- Real Time
- Delivery date to be confirmed on Sales Order Update with real time availability and Net price
- Rubber
- E
- Selected liquid temperature
- 68 °F
- Shaft
- Stainless steel
- Shaft diameter
- 0.94 in
- Size of inlet connection
- DN 80
- Size of outlet connection
- DN 65
- Standard
- EN 1092-2
- Starting current
- 820-820 %
- Support block (Yes/No)
- N
- Type
- SIEMENS
- Version
- A
Dimensional Drawing
Wiring Diagram
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