Multi-stage centrifugal pump CR 32-3 A-F-A-E-HQQE

The Grundfos CR 32-3 A-F-A-E-HQQE multistage centrifugal pump is a high-efficiency solution designed for commercial building applications, including heating, air conditioning, and pressure boosting systems. This model, with vertical installation and inline suction and discharge ports, is made from robust and reliable materials, ensuring long-lasting performance and easy maintenance.

The pump head and base are constructed from cast iron (EN 1563 EN-GJS-500-7), while all parts in contact with the liquid are made from stainless steel (AISI 304), offering excellent corrosion resistance and great durability, even in demanding working conditions. The Grundfos CR 32-3 is perfect for handling water and other liquids in applications requiring high flow and stable pressure, such as in heating and air conditioning systems in large commercial buildings.

One of the standout features of this pump is its cartridge mechanical seal, which facilitates maintenance tasks and increases operational reliability. This seal allows safe and easy access to the pump's internal components, significantly reducing downtime during maintenance.

The pump impeller is made from stainless steel (EN 1.4301), providing high corrosion resistance and a long service life. Additionally, the split coupling design allows efficient power transmission between the motor and the pump, ensuring optimal performance at all times.

Technical Specifications:

• Nominal flow rate: 30 m³/h.
• Nominal head: 44.1 m.
• Nominal speed: 2919 rpm.
• Liquid temperature range: From -30 °C to 120 °C, with a recommended operating temperature of 20 °C.
• Maximum working pressure: 16 bar, capable of withstanding temperatures up to 120 °C.
• Orientation: Vertical.

Construction Materials:

• Base and head: Cast iron (EN 1563 EN-GJS-500-7, ASTM A536 80-55-06), ensuring structural strength and stability.
• Impeller: Stainless steel (EN 1.4301 / AISI 304), designed to offer high corrosion resistance and great durability in liquid handling.
• Support bearing: Made from Graflon, ensuring a long service life and smooth operation.

Electrical Data:

• Nominal power (P2): 5.5 kW.
• Frequency: 50 Hz.
• Nominal voltage: 3 x 380-415V.
• Nominal current: 11 A.
• Nominal motor speed: 2920-2940 rpm.
• Motor efficiency: 89.2% at full load, 90% at 3/4 load, ensuring efficient operation.
• Protection rating: IP55, ensuring protection against dust and water jets, allowing safe operation in industrial environments.
• Insulation class: F, ensuring greater thermal resistance in demanding conditions.

Key Benefits:

• Robust and durable construction: The use of high-quality materials, such as stainless steel and cast iron, ensures a long service life and resilience in demanding applications. This makes the pump ideal for use in commercial heating and air conditioning systems where continuous and reliable operation is required.
• Cartridge mechanical seal: This feature facilitates maintenance, allowing quick and safe access to the pump's internal components, reducing downtime during repair and maintenance tasks.
• High energy efficiency: With an IE3 motor efficiency, the CR 32-3 A-F-A-E-HQQE pump ensures low energy consumption compared to other pumps in its category, making it a cost-effective option for long-term applications.
• High pressure and temperature handling capability: The pump can handle pressures up to 16 bar and temperatures ranging from -30°C to 120°C, making it extremely versatile for various commercial applications.
• Split coupling: Allows efficient power transmission between the motor and the pump, ensuring consistent performance and minimizing energy losses.

Main Applications:

• Heating and air conditioning in commercial buildings: Ideal for water recirculation in large HVAC and heating systems in skyscrapers, shopping centres, hospitals, and more.
• Pressure boosting: Suitable for increasing pressure in water distribution systems in commercial buildings, ensuring a constant and stable supply.
• Liquid transport: Can be used for transporting water and other liquids under high pressure and variable temperature conditions.