Grundfos Nbg 50-32-250/262 Vertical or Horizontal Mounting Horizontal Centrifugal Pump End Suction Single Stage Close Coupled Space Saving

• Customization: Available
• Max.Head: 177 M
• Max.Capacity: 1401 M³/H
• Model NO.: NBG 50-32-250/262 AAF2AESBQQEOW1
• 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
• Rated Flow Rate: 27.01 M³/H
• Rated Head: 79.51 M
• Power Supply Frequency: 50 Hz
• Rated Voltage: 3 X 380-400/660-690 V
• Net Weight: 173 Kg
• Gross Weight: 198 Kg
• Transport Package: Standard Export Plywood Case or Carton
• Specification: 1660 kg
• Trademark: Grundfos
• Production Capacity: 100

Product Description

End-suction close-coupled single-stage pump

NBG 50-32-250/262 AAF2AESBQQEOW1
Number: 93350683
Applications:

 

• Commercial heating
• Commercial air conditioning
• Commercial water pressure boosting
• District heating
• Industrial cleaning processes
• Heating supply
• Desalination
• Municipal water transmission and distribution
• Irrigation
• Community and building water supply
  Short-coupled pump in accordance with ISO 2858

 

NBG 50-32-250/262 AAF2AESBQQEOW1 The non-self-priming single-stage volute centrifugal pump is designed in accordance with ISO 5199, and its dimensions and rated performance comply with ISO 2858 (16 bar). The flanges are of PN 16 type, with dimensions conforming to EN 1092-2. The pump features an axial suction port, a radial discharge port, a horizontal shaft, and a back-pull-out design, allowing maintenance personnel to disassemble the motor, motor bracket, cover, and impeller without loosening the pump casing or pipelines. The unbalanced O-type shaft seal meets the requirements of DIN EN 12756. An air-cooled asynchronous motor is closely coupled to the pump.

 

Controller:

 

• Frequency converter: None
• Pressure sensor: N

 

Liquid:

 

• Liquid conveyed: Water
• Liquid temperature range: -25 .. 120 °C
• Liquid temperature during operation: 20 °C
• Density: 998.2 kg/m³

 

Technical Data:

 

• Pump speed basis: 2945 rpm
• Rated flow rate: 27.01 m³/h
• Rated head: 79.51 m
• Impeller actual diameter: 262 mm
• Impeller nominal speed: 250
• Impeller type: Standard
• Shaft seal configuration: Single
• Main shaft seal: BQQE
• Shaft seal code: BQQE
• Curve tolerance: ISO9906:2012 3B
• Bearing design: Standard

 

Materials:

 

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

 

Installation:

 

• Maximum ambient temperature: 40 °C
• Maximum operating pressure: 16 bar
• Pipeline connection standard: EN 1092-2
• Inlet size: DN 50
• Outlet size: DN 32
• Pressure rating for pipe connection: PN 16
• Bearing lubrication: Grease
• Pump casing with support block: Yes
• Yes = With support block, No = Without support block: N

 

Electrical Data:

 

• Motor model: 160MB
• Rated power - P2: 15 kW
• Power supply frequency: 50 Hz
• Rated voltage: 3 x 380-400/660-690 V
• Rated current: 27.8-26.4/16.0-15.3 A
• Starting current: 820 %
• Cos phi - Power factor: 0.88
• Rated speed: 2945 rpm
• Efficiency: IE4 93.3%
• IE efficiency class: IE4
• Motor full-load efficiency: 93.3 %
• Motor efficiency at 3/4 load: 93.1 %
• Motor efficiency at 1/2 load: 92.0 %
• Motor pole count: 2
• Enclosure rating (IEC 34-5): 55 (Protect. water jets/dust)
• Insulation class (IEC 85): F
• Motor number: 92555097
• Bearing insulation type N end: N

 

Other:

 

• Minimum Efficiency Index, MEI ≥: 0.70
• Net weight: 173 kg
• Gross weight: 198 kg
• Transport volume: 0.707 m³