Grundfos 1/2HP 3/4HP Centrifugal Pump Manufacturer Supplier Water Pump for Commercial Heating

• Customization: Available
• Max.Head: 105m
• Max.Capacity: 2396 M³/H
• Model NO.: NK 40-225/250 AA1F1S3ESBQQEJW3
• Driving Type: Motor
• Impeller Number: Single-Stage Pump
• Working Pressure: 10bar
• Influent Type of Impeller: Single Suction Pump
• 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: Commercial Water Pressurization
• Liquid Conveyed: Water
• Liquid Temperature Range: -25 .. 120 °c
• Liquid Temperature During Operation: 20 °c
• Density: 998.2 Kg/M³
• Rated Flow Rate: 31.78 M³/H
• Rated Head: 18.25 M
• Maximum Operating Pressure: 10 Bar
• Transport Package: Standard Export Plywood Case or Carton
• Specification: 2430 kg
• Trademark: Grundfos
• Production Capacity: 100

Product Description

Product Description

End-suction long-coupled single-stage pump
NK 40-225/250 AA1F1S3ESBQQEJW3
Number: 93330814

 

Applications:

 

• Commercial heating

 

Compliance: Standard pump in accordance with EN 73

NK 40-225/250 AA1F1S3ESBQQEJW3 The non-self-priming single-stage volute centrifugal pump is designed in accordance with ISO 5199, and its dimensions and rated performance comply with EN 733. The flanges are of PN 10 type, with dimensions conforming to EN 1092-2. The pump is equipped with an axial suction port, a radial discharge port, and a horizontal shaft. It adopts a back-pull-out design, allowing maintenance personnel to disassemble the coupling, bearing bracket, and impeller without loosening the motor, pump casing, and pipelines. The unbalanced O-type shaft seal meets the requirements of DIN EN 12756. An air-cooled base-mounted asynchronous motor is installed on the pump, with both the pump body and the motor mounted on the same base frame.

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: 1,440 rpm
• Rated flow rate: 31.78 m³/h
• Pump with motor: Y
• Rated head: 18.25 m
• Impeller actual diameter: 250 mm
• Impeller nominal speed: 225
• Main shaft seal: BQQE
• Shaft seal code: BQQE
• Mechanical seal type: Single
• Curve tolerance: ISO9906:2012 2B
• Bearing design: Standard

 

Materials:

 

• Pump housing: Cast iron
  • Pump housing: EN 1561 EN-GJL-250
  • Pump housing: ASTM A48-35
• Impeller: Stainless steel
  • Impeller material: EN 1.4308
  • Impeller material: ASTM A351 CF8
• Internal pump housing coating: Painting
• Shaft: Steel
  • Shaft material: EN 1.0503/1.4301
  • Shaft material: AISI 1045/304

 

Installation:

 

• Maximum ambient temperature: 40 °C
• Maximum operating pressure: 10 bar
• Pipeline connection standard: EN 1092-2
• Inlet connection type: DIN
• Outlet connection type: DIN
• Inlet size: DN 65
• Outlet size: DN 40
• Pressure rating for pipe connection: PN 10
• Coupling type: Flexible w/o spacer
• Base frame design: C-channel
• Base frame code: 240
• Grouting (Yes/No): N

 

Electrical Data:

 

• Motor model: 100L
• Rated power - P2: 3 kW
• Power supply frequency: 50 Hz
• Rated voltage: 3 x 220-230/380-400 V
• Rated current: 10.9-10.4/6.3-5.99 A
• Starting current: 950 %
• Cos phi - Power factor: 0.8
• Rated speed: 1,440 rpm
• Efficiency: IE4 90.4%
• IE efficiency class: IE4
• Motor full-load efficiency: 90.4 %
• Motor efficiency at 3/4 load: 90.7 %
• Motor efficiency at 1/2 load: 90.1 %
• Motor pole count: 4
• Enclosure rating (IEC 34-5): 55 (Protect. water jets/dust)
• Insulation class (IEC 85): F
• Motor number: 92816757
• Bearing insulation type N end: N

 

Other:

 

• Minimum Efficiency Index, MEI ≥: 0.70
• Net weight: 130 kg
• Gross weight: 153 kg
• Transport volume: 0.428 m³
• Place of origin: CN