Grundfos CRI 5-5 A-FGJ-A-E-HQQE Centrifugal Pump

The Grundfos CRI 5-5 A-FGJ-A-E-HQQE centrifugal pump is a vertical multistage pump specifically designed to meet the demands of heating, air conditioning, and pressure boosting systems in commercial buildings. Its stainless steel construction ensures durability and corrosion resistance, making this pump a reliable choice for applications requiring sustained and dependable performance in demanding conditions.

This model features a vertical design with inline suction and discharge ports, facilitating installation and enhancing system efficiency. The parts in contact with the liquid are made of stainless steel (EN 1.4301), ensuring excellent corrosion resistance, even when the pump is exposed to aggressive liquids. This is particularly useful in commercial applications where durability and reliability are essential.

The HQQE type cartridge mechanical seal included in this pump provides maximum operational reliability while allowing safe handling and easy access for maintenance. The split coupling ensures efficient power transmission and reduces vibrations, prolonging the lifespan of both the motor and the pump overall.

Key Technical Features:

• Nominal Flow Rate: 5.8 m³/h, ensuring adequate liquid supply for common commercial applications.
• Nominal Head: 24.1 metres, allowing liquid to be elevated to significant levels, ideal for pressure boosting systems in multi-level buildings.
• Liquid Temperature Range: from -20 to 120 °C, making it extremely versatile for a variety of operating conditions, from cooling systems to high-temperature applications.

In terms of installation, the CRI 5-5 A-FGJ-A-E-HQQE is equipped to withstand a maximum working pressure of 25 bar, making it suitable for high-pressure systems in commercial buildings. Piping connections are made via DIN, ANSI or JIS flanges, providing great flexibility for installation in different markets and standards. The maximum ambient operating temperature is 60 °C, ensuring the pump can operate efficiently even in hot or industrial environments.

Construction Materials:

• Pump Base and Casing: Stainless steel EN 1.4408 (AISI 316), known for its excellent corrosion resistance.
• Impeller: Made of stainless steel EN 1.4301 (AISI 304), providing exceptional durability and resistance in demanding working conditions.

The motor of this pump is a three-phase asynchronous motor, fan-cooled, that complies with IEC standards and has an IE3 energy efficiency rating, ensuring low energy consumption and reduced operating costs. The motor has a nominal power of 0.75 kW, providing adequate performance for commercial applications without compromising energy efficiency. Additionally, the motor operates at a speed of 2840-2870 rpm, ensuring a constant and uniform flow of the pumped liquid.

Additional Important Details:

• Maximum Working Pressure: 25 bar, allowing operation in high-pressure systems without compromising safety or performance.
• Inlet and Outlet Connection: DN 25/32, with a nominal pressure of PN 25, ensuring suitable installation for a wide variety of applications.
• Motor Efficiency: Up to 82.7% at three-quarters load, contributing to lower energy consumption during prolonged operation.

This model is ideal for applications requiring pressure boosting, heating, or air conditioning in commercial buildings, where reliability and durability are key. Its robust structure, along with the use of high-quality materials such as stainless steel and silicon carbide (SIC) bearings, ensure long-lasting performance and easy maintenance.

In summary, the Grundfos CRI 5-5 A-FGJ-A-E-HQQE is a vertical multistage centrifugal pump designed to maximise efficiency and durability in demanding commercial applications. Thanks to its compact design, ease of maintenance, and capacity to operate across a wide range of temperatures and pressures, this pump becomes a reliable and high-performance solution for heating, air conditioning, and pressure boosting systems in commercial buildings.