Wilo Para High-Efficiency Circulator Pump for Underfloor Heating 25/6 SC

The Wilo Para High-Efficiency Circulator Pump for Underfloor Heating 25/6 SC Model is a glandless electronic pump designed for hot water heating systems, including UFH, featuring self-controlled modes for energy savings and reliable performance.

Product Description

The Wilo Para is a high-efficiency circulator series dedicated to heating and air-conditioning applications, with a compact design and predefined standard settings. It features a cast iron pump housing, threaded connection, and self-controlled modes (Δp-v, Δp-c, constant speed). Recommended for underfloor heating, it adjusts performance to system demands, reducing energy consumption. The pump is suitable for clean water or water-glycol mixtures, with IPX4D protection and integrated motor protection.

Key Features

• Self-controlled modes: Δp-v, Δp-c, constant speed I, II, III for optimized operation in UFH and heating systems.
• Energy efficient: EEI ≤ 0.21, low power consumption (3-43 W for 25/6 model).
• Compact design: 130 mm or 180 mm port-to-port length for easy replacement.
• Protection: IPX4D, integrated motor protection, self-venting and deblocking functions.
• Quiet operation: Suitable for residential use.
• Wide temperature range: Fluid -10°C to +95°C.

Technical Specifications

• Model: Para 25/6 SC (common for UFH).
• Max head: 6.7 m.
• Max flow: 3.3 m³/h.
• Fluid temperature range: -10°C to +95°C.
• Ambient temperature: -10°C to +70°C.
• Max operating pressure: 10 bar.
• Power supply: 1~230 V, 50-60 Hz.
• Power input: 3-43 W.
• Current: 0.04-0.44 A.
• Max speed: 4300 rpm.
• EEI: ≤ 0.21.
• Protection class: IPX4D.
• Min inlet pressure: 0.5 m at 50°C, 4.5 m at 95°C.
• Pumped liquid: Heating water (VDI 2035), water-glycol mixtures (max 30%).

Dimensions & Weights

• Port-to-port length: 130 mm or 180 mm.
• Weight: Approx. 2 kg.

System & Application Notes

• Ideal for underfloor heating, radiator systems, and air-conditioning in residential settings.
• Compatible with heating water and water-glycol mixtures; check pumping data for mixtures above 20%.
• Installation: Horizontal motor axis; compact for easy replacement; use with blending valves for UFH.
• Control via green push button for modes and curves.
• Professional installation recommended; warranty typically 5 years.