This Grundfos UPM3 FLEX Circulating Pump connects internal heating pipework by efficiently circulating water throughout your system. Specifically, it provides a highly durable and precise transfer of heating mediums with a maximum delivery head of up to 7.5 meters. Furthermore, thanks to the flexible internal control, you significantly speed up installation by easily selecting the right pump performance curve without needing an external PWM controller.
Therefore, this Grundfos UPM3 FLEX Circulating Pump works perfectly for underfloor heating and modern HVAC systems. Additionally, it easily handles demanding applications, integrating smoothly into manifold cabinets with limited space options and increased ambient temperatures up to 70°C.
The pump features a robust construction engineered with a cast iron body alongside an ultra-durable ceramic bearing shaft. Moreover, the highly efficient motor operates with a variable power input between 2W and 60W, achieving an impressive Energy Efficiency Index (EEI) of ≤ 0.20. As a result, this reliable build makes it fully dependable for long-term residential and commercial installations.
Key Features & Benefits of Grundfos UPM3 FLEX Circulating Pump:
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Ultra-Compact Design: The pump design makes it one of the smallest circulators available on the market. Consequently, you achieve fast, flexible installation in tight spaces such as underfloor manifolds or inside boilers.
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Flexible Control Modes: The system incorporates selectable proportional pressure, constant pressure, and constant curve operations. For example, you can easily adapt the pump to your specific heating network requirements entirely without a PWM signal. Ultimately, this allows you to create a highly customizable and responsive setup.
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Double De-blocking System: The unit features a double protection system with an electronic mechanism maintaining a starting torque up to 25 Ncm and a manual de-blocking port. Importantly, the front access allows you to clear rotor blockages effortlessly without dismantling the control box, saving time during maintenance.
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High Temperature Resistance: The device provides excellent structural integrity, operating flawlessly in ambient temperatures reaching up to 70°C. Besides that, its performance allows for the safe pumping of liquids from +2°C to +110°C, significantly reducing the risk of overheating in demanding heating networks.
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High Energy Efficiency: By utilizing a glandless motor with an EEI of ≤ 0.20, the pump significantly reduces household electricity consumption. Therefore, it guarantees optimal savings while complying with strict EN 16297/3 eco-design standards.
Technical Specifications:
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Brand: Grundfos
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Model: UPM3 FLEX (e.g., 25-70)
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Product Type: High-Efficiency Internally Controlled Circulating Pump
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Maximum Head: Up to 7.5m
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Port-to-Port Length: 130 mm
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Connection Size: G 1 1/2″ (DN25)
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Power Consumption: 2W to 60W
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Energy Efficiency Index (EEI): ≤ 0.20
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Protection Class: IP44
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Max Ambient Temperature: Up to 70°C
