Grundfos CR3-36 Multistage pumps

• Water supply and boosting in commercial buildings and industrial processes.
• Industrial washing and cleaning systems requiring high pressure.
• Reverse osmosis and ultrafiltration systems.
• Temperature control circuits and HVAC applications.
• Light industrial process water circulation.

Pump type

Vertical multistage centrifugal pump, commonly featuring an inline design.

Material construction

This unit is specified as stainless steel, which is typical for Grundfos CR series pumps, ensuring corrosion resistance for various liquids.

Motor power

This specific unit features a 3kW motor. For this class, motor powers commonly range from fractional kW up to several tens of kW, depending on the specific CR model variant.

Rotational speed

This unit operates at 2902 RPM, which is typical for 2-pole motors in 50Hz regions, suitable for high-efficiency pumping.

Typical flow rates

For a CR3 series pump, typical flow rates can range up to approximately 4-5 m³/h at nominal duty points, depending on the number of stages and head requirements.

Typical head

The '36' in CR3-36 indicates 36 stages, suggesting this unit is designed for high head applications, potentially offering over 100 metres of head for this series.

Power supply

Units of this motor size (3kW) are commonly configured for three-phase electrical supply (e.g., 400V, 50Hz in the UK).

• What does 'multistage' mean for a pump?

  Multistage pumps use multiple impellers in series to progressively increase the pressure (head) of the fluid, making them suitable for applications requiring high discharge pressure.

• What are the advantages of a stainless steel pump?

• Can this pump handle abrasive fluids?

• Is this unit suitable for variable speed operation?

• What maintenance is typically required for these pumps?

Centrifugal pumps are widely regarded as reliable workhorses in laboratory and pharmaceutical applications. Buyers typically value their smooth operation, low maintenance requirements, and consistent performance across diverse fluid handling tasks. When purchasing used models, buyers commonly prioritize checking seal condition, impeller integrity, and motor functionality. Industry sentiment favours units from established manufacturers with documented service histories. Key strengths include durability, cost-effectiveness compared to new equipment, and suitability for both routine and demanding applications.

General overview for this equipment type