Grundfos Nbg 300-250-500/525 Heating Water Pressurization Centrifugal Pump

• Customization: Available
• Max.Head: 177 M
• Max.Capacity: 1401 M³/H
• Model NO.: NBG 300-250-500/525 AIAF2AESBAQEWW5
• Driving Type: Motor
• Impeller Number: Single-Stage Pump
• Working Pressure: 25bar
• Influent Type of Impeller: Single Suction Pump
• Position of Pump Shaft: Vertical Pump
• Pump Casing Combined: Verticaljoint Surface Pump
• Mounting Height: Horizontal End Suction Centrifugal Pump
• Impeller: Closed
• Usage: Heating
• Transported Liquids: Water
• Liquid Temperature Range: 0 .. 120 °c
• Liquid Temperature During Operation: 20 °c
• Density: 998.2 Kg/M³
• Transport Package: Standard Export Plywood Case or Carton
• Specification: 1660 kg
• Trademark: Grundfos
• Production Capacity: 100

Product Description

NBG 300 - 250 - 500/525 AIAF2AESBAQEWW5

Applications:
1.Commercial heating
2.Commercial air - conditioning
3.Commercial water boosting
4.District heating
5.Industrial cleaning processes
6.Heat supply
7.Desalination
8.Municipal water transmission and distribution
9.Irrigation
10.Water supply for residential areas and buildings
Short - coupled pump in accordance with ISO 2858

NBG horizontal end suction centrifugal pump: suitable for harsh application scenarios
The Grundfos NBG horizontal end suction centrifugal pump is a non self suction, single-stage centrifugal volute pump with an axial suction port, radial discharge port, and horizontal shaft. This pump is highly suitable for various demanding application scenarios and can provide reliable and effective water supply.
Due to the use of a tightly coupled pump design, installation in a limited space is very simple. The main dimensions of the NBG end suction centrifugal pump comply with the ISO2858 standard and are tested according to the ISO909906:2012 acceptance level standard before leaving the factory.
 

NBG 300-250-500/525 AIAF2AESBAQEWW5 The non self-priming single-stage vortex shell centrifugal pump is designed according to the ISO5199 standard, and its size and rated performance comply with the ISO2858 standard (16 bar). The flange is PN 16 type, and its dimensions comply with EN 1092-2 standard. The water pump is equipped with an axial suction port, a radial discharge port, a horizontal shaft, and a rear pull design, which allows maintenance personnel to disassemble the motor, motor seat, cover, and impeller without loosening the pump casing or pipeline. The unbalanced O-type shaft seal complies with DIN EN 12756 standard. A air-cooled asynchronous motor is tightly coupled to the water pump.

 

Controller                        
Frequency converter: None
Pressure sensor: N

 

Liquid                                
Liquid being transported: Water
Liquid temperature range: 0..120 °C
Liquid temperature during operation: 20 °C
Density: 998.2 kg/m³

 

Technology                               
Pump speed based on which pump data is obtained: 992 revolutions per minute
Rated flow rate: 667.9 m³/h
Rated head: 35.87 meters
Actual impeller diameter: 525 mm
Nominal impeller diameter: 500
Type of impeller: Standard
Shaft - seal configuration: Single
Main shaft seal: BAQE
Shaft seal code: BAQE
Curve tolerance: ISO9906:2012 3B
Bearing design: Standard

 

Materials                                     
Pump casing: Cast iron
Pump housing: EN - GJL - 250
Pump casing: ASTM class 35
Wear ring: Brass
CuZn34Mn3AI2Fe1 - C
Impeller: Cast iron
               EN - GJL - 200
               ASTM class 30
Internal pump - house coating: CED
Shaft: Stainless steel
           EN 1.4301
            AISI 304
 

nstallation                                 
Maximum ambient temperature: 40 °C
Maximum operating pressure: 16 bar
Pipe connection standard: EN 1092 - 2
Inlet size: DN 300
Outlet size: DN 250
Pressure rating for pipe connection: PN 16
Bearing lubrication: Grease
Pump housing with feet: Yes
Yes = With support block, No = Without support block: N

 

Electrical data                            
Motor model: INNOMOTICS
Rated power - P2: 90 kW
Power supply frequency: 50 Hz
Rated voltage: 3 x 380 - 420/660 - 725 V
Rated current: 160/93 A
Starting current: 820 %
Cos phi - Power factor: 0.85
Rated speed: 992 revolutions per minute
Efficiency: IE4 95.6%
IE efficiency class: IE4
Motor full - load efficiency: 95.6 %
Motor efficiency at 3/4 load: 95.9 %
Motor efficiency at 1/2 load: 95.7 %
Number of motor poles: 6
Enclosure rating (IEC 34 - 5): IP55
Insulation class (IEC 85): F
Motor number: 92848342
Bearing insulation type N - end: CERAMIC SHAFT COATING

 

Others                                      
Minimum efficiency index, MEI ≥: 0.48
Net weight: 1590 kg
Gross weight: 1660 kg
Shipping volume: 2.27 m³