Grundfos Nke 250-315/260-210 Water Pump Regional Heating and Cooling Equipment

• Customization: Available
• Max.Head: 185m
• Max.Capacity: 719 M³/H
• Model NO.: NKE 250-315/260-210 AA1F1SBESBQQEPWA
• Driving Type: Motor
• Impeller Number: Single-Stage Pump
• Working Pressure: 25bar
• Influent Type of Impeller: End Suction
• Position of Pump Shaft: Horizontal Pump
• Pump Casing Combined: Horizontal Split Pumps
• Mounting Height: Non Self-Priming Single-Stage Centrifugal Volute P
• Impeller: Closed
• Usage: Circulating Pump
• Net Weight: 2270 Kg
• Transported Liquids: Water
• Liquid Temperature Range: -25 .. 120 °c
• Liquid Temperature During Operation: 20 °c
• Transport Package: Standard Export Plywood Case or Carton
• Specification: 2430 kg
• Trademark: Grundfos
• Production Capacity: 100

Product Description

NKE 250-315/260-210 AA1F1SBESBQQEPWA
Number 93121462

Applicable to
1.Commercial heating
2.Commercial air conditioning
3.Commercial water pressurization
4.Regional heating
5.Regional cooling
6.Machining
7.Process water distribution
8.Heating supply
9.refrigeration
10.Industrial water supply and transportation
11.Process water treatment
12.Seawater desalination
13.Surface water intake
14.Drinking water treatment
15.Municipal water supply and distribution
16.irrigation
17.Water supply for residential areas and buildings
18.sewage disposal

Pump with MGE motor in accordance with EN 733 standard

The powerful NKE end - suction pump is suitable for demanding applications.
The Grundfos NKE end - suction long - coupled pump is a non - self - priming single - stage centrifugal volute pump with an axial suction port, a radial discharge port, and a horizontal shaft. If your pump is used in demanding applications where the flow requirements change, the NKE can be equipped with an 11 - kW permanent - magnet MGE motor, with a built - in variable - frequency drive and IE5 efficiency, maintaining high efficiency at all times.
The NKE long - coupled pump is designed with main dimensions in accordance with the EN 733 standard, so the use of a spacer coupling makes maintenance easy. All our end - suction pumps are tested according to the acceptance grade standard of ISO 9906:2012 before leaving the factory.

NKE 250 - 315/260 - 210 AA1F1SBESBQQEPWA The non - self - priming single - stage volute centrifugal pump is designed in accordance with the ISO 5199 standard, and its dimensions and rated performance comply with the EN 733 standard. The flanges are of PN 10 type, and their dimensions conform to the EN 1092 - 2 standard. The pump has an axial suction port, a radial discharge port, and a horizontal shaft. It adopts a back - pull - out design, enabling maintenance personnel to disassemble the coupling, bearing bracket, and impeller without loosening the motor, pump casing, and pipes. The unbalanced O - ring shaft seal meets the DIN EN 12756 standard. An air - cooled, base - mounted permanent - magnet synchronous motor is installed on the pump. The pump body and the motor are mounted on the same base frame. The motor's junction box contains a frequency converter and a PI controller. This allows the system to continuously adjust the motor speed, enabling the pump to be adjusted to the optimal operating state according to environmental conditions.

Controller                   
Frequency converter: Built - in
Pressure sensor: N

 

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

 

Technology                   
Pump speed based on which pump data is obtained: 1462 revolutions per minute
Rated flow rate: 522.5 m³/h
Pump with motor: Y
Rated head: 8.91 meters
Actual impeller diameter: 235 mm
Nominal impeller diameter: 315
Main shaft seal: BQQE
Shaft seal code: BQQE
Mechanical seal type: Single
Curve tolerance: ISO9906:2012 2B
Bearing design: Standard

 

Materials                         
Pump casing: Ductile iron
Pump housing: EN 1563 EN - GJS - 500 - 7
Pump housing: ASTM 70 - 50 - 05
Impeller: Stainless steel
               EN 1.4308
ASTM A351 CF8
Internal pump - house coating: Painting
Shaft: Steel
          EN 1.0503/1.4301
          AISI 1045/304
 

Installation                         
Ambient temperature range: - 20..50 °C
Maximum operating pressure: 10 bar
Pipe connection standard: EN 1092 - 2
Type of inlet connection: DIN
Type of outlet connection: DIN
Inlet size: DN 300
Outlet size: DN 250
Pressure rating for pipe connection: PN 10
Coupling type: Flexible w/o spacer
Base frame design: C - channel
Code for base frame: 505
Grouting (Yes/No): N

 

Electrical data                           
Motor model: 180MF
Rated power - P2: 18.5 kW
Power supply frequency: 50 / 60 Hz
Rated voltage: 3 x 380 - 480 V
Rated current: 33.2 - 26.9 A
Cos phi - Power factor: 0.94 - 0.93
Rated speed: 180 - 2200 revolutions per minute
IE efficiency class: IE5
Motor full - load efficiency: 93.2 %
Number of motor poles: 4
Degree of protection (IEC 34 - 5): IP55
Insulation class (IEC 85): F
Motor number: 92967765
Bearing insulation type N - end: Steel Bearing

 

Others                     
Minimum efficiency index, MEI ≥: 0.70
Net weight: 658 kg
Gross weight: 770 kg
Transport volume: 2.39 m³