This Wilo-Para Ku 25/6-130 High-Efficiency 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 6.3 meters and a maximum volume flow of 2.6 m³/h. Furthermore, thanks to the intuitive push-button technology (SC), you significantly speed up installation by easily selecting between variable differential pressure, constant differential pressure, or three constant speed modes on site.
Therefore, this Wilo Circulating Pump works perfectly for OEM heating applications and modern underfloor or radiator HVAC systems. Additionally, it easily handles demanding applications, integrating smoothly with heating water in accordance with VDI 2035 or water-glycol mixtures up to a 1:1 ratio.
The pump features a robust construction engineered with an inline PA6.6 composite pump housing reinforced with 30% glass fiber alongside a resilient stainless steel shaft. Moreover, this highly efficient motor operates with a low power consumption ranging from 3W to 43W, achieving an impressive Energy Efficiency Index (EEI) of ≤ 0.20. As a result, this reliable build makes it fully dependable for long-term continuous operation under a maximum static pressure of PN6.
Key Features & Benefits:
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Smart Push-Button Control: The interface design allows for quick selection between variable pressure (ΔP-v), constant pressure (ΔP-c), and constant speed (I, II, III) settings. Consequently, you achieve optimal performance tailored to your specific heating network without complex programming.
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High-Efficiency Performance: The system incorporates a motor that draws only between 3W and 43W during operation. For example, this results in an outstanding EEI rating of ≤ 0.20. Ultimately, this allows you to create highly energy-efficient and compliant HVAC installations.
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Durable Composite Housing: The pump body is crafted from a tough PA6.6 composite reinforced with 30% glass fiber (GF 30%). Importantly, it completely prevents corrosion and maintains long-term structural integrity under demanding thermal conditions.
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Versatile Fluid Handling: The pump is fully approved to circulate heating water compliant with VDI 2035 and water-glycol mixtures up to a 50% ratio. Therefore, it guarantees full protection and reliable operation across various climatic setups.
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Compact 130mm Fit: The unit features a standard 130 mm overall length combined with a G 1½” (Rp 1) connection thread. Besides that, this compact configuration ensures a seamless fit into pre-assembled manifold groups or tight distribution cabinets.
Technical Specifications:
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Brand: Wilo
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Model: Wilo-Para Ku 25/6-130 (Para KU25-130/6-43/SC)
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Product Type: High-Efficiency Circulating Pump
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Max Delivery Head: 6.3 m
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Max Volume Flow: 2.6 m³/h
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Power Consumption: 3W to 43W
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Max Static Pressure: PN6
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Overall Length: 130 mm
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Threaded Connection: G 1½” (Rp 1)
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Protection Class / Insulation Class: IPx4D / Class F
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Energy Efficiency Index (EEI): ≤ 0.20













