Grundfos CR 255-6-2 Water Pipeline System Circulating Booster Centrifugal High Pressure Pump

CR 255-6-2 A-F-A-E-HQQE
Vertical multistage centrifugal pump with inlet and outlet on the same horizontal plane (in-line). The pump head and base are made of cast iron, while all other liquid-contact components are manufactured from stainless steel. The built-in thrust balancing device absorbs hydraulic axial forces, allowing the use of standard motors. The Grundfos cartridge-type shaft seal enhances the machine's reliability and operational safety, making maintenance more straightforward. Electrical energy is transmitted via a split coupling. Pipe connections are achieved through DIN flanges. The pump is equipped with a three-phase asynchronous motor featuring a cooling fan and a foot bracket.

CR 255-6-2 A-F-A-E-HQQE Number: 92537103 Applications: Commercial heating Commercial air conditioning Commercial water pressure boosting District heating District cooling Machining Industrial cleaning processes Process water distribution Heating supply Refrigeration Industrial water supply and transportation Industrial wastewater Process water treatment Desalination Surface water intake Drinking water treatment Municipal water transmission and distribution Irrigation Solar water solutions Community and building water supply Vertical multistage centrifugal pump with suction and discharge ports on the same horizontal plane. The pump head and base are made of cast iron, while all other wetted components are made of stainless steel (EN 1.4301).

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

• Pump speed basis: 2984 rpm
• Rated flow rate: 255 m³/h
• Rated head: 220 m
• Pump orientation: Vertical
• Shaft seal configuration: Single
• Main shaft seal: HQQE
• Shaft seal code: HQQE
• Approvals: CE, UKCA, SEPRO
• Drinking water certification: ACS
• Curve tolerance: ISO9906:2012 3B

• Base: Ductile cast iron
  • Base standards: EN 1563 EN-GJS-500-7 / ASTM A536-84 65-45-12
• Impeller: Stainless steel
  • Impeller material: EN 1.4401 / AISI 316
• Bearings: WC/WC
• Support bearings: Graflon
• Thrust balancing device: SiC/WC
• Materials certified to: European standards

• Maximum ambient temperature: 55 °C
• Maximum operating pressure: 40 bar
• Maximum pressure at specified temperatures:
  • 25 bar / 120 °C
  • 40 bar / 80 °C
• Connection types: DIN
• Inlet size: DN 200
• Outlet size: DN 200
• Pressure rating for pipe connection: PN 40
• Motor flange size: FF600

• Motor standard: IEC
• Motor model: INNOMOTICS
• Rated power - P2: 200 kW
• Pump required power (P2): 200 kW
• Power supply frequency: 50 Hz
• Rated voltage: 3 x 380D/660Y V
• Rated current: 345/199 A
• Starting current: 790 %
• Cos phi - Power factor: 0.92
• Rated speed: 2982 rpm
• Efficiency: IE3 95.8%
• IE efficiency class: IE3
• Motor full-load efficiency: 95.8 %
• Motor efficiency at 3/4 load: 96.1 %
• Motor efficiency at 1/2 load: 95.6 %
• Motor pole count: 2
• Enclosure rating (IEC 34-5): IP55
• Insulation class (IEC 85): F
• Motor number: M1U05352

• Frequency converter: None

• Junction box position: 6
• Minimum Efficiency Index, MEI ≥: 0.70
• Net weight: 1530 kg
• Gross weight: 1750 kg
• Transport volume: 4.25 m³

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