220V Quiet Hot Water Circulating Pump 100W 120W with Automatic Reflux Valve for Radiator and Underfloor Heating

Compact circulating pump for heating and liquid transfer This circulating pump is designed for reliable hot water circulation and flow liquid transfer. It combines a reflux valve design and copper wound motor for durable operation in floor heating, radiator circulation, and industrial liquid handling. Key benefits Continuous operation with builtin reflux valve: if the outlet becomes blocked the motor continues running while the reflux valve opens to allow internal water circulation, avoiding pressure spikes in the pipework. Versatile performance: options for 100 W and 120 W power ratings and multiple flow configurations make the pump adaptable to different system needs. Quiet operation and large flow capacity suit workshop or plant environments where noise and throughput matter. Robust electrical and thermal tolerance for heating systems: compatible with typical 220 V systems and a wide liquid temperature range. Specifications Power options: 100 W and 120 W Voltage: 220 V Diameter: 25 mm Nominal flow examples: 20 L/min and 26 L/min Maximum flow: up to 30 L/min Maximum lift: 9 to 9.5 m depending on model Liquid temperature range: 10 to 90 degrees C Ambient temperature: up to 40 degrees C Motor winding: copper wire Reflux valve design for internal circulation when outlet is blocked Applications and use scenarios Underfloor heating and radiator hot water circulation: maintains steady circulation for residential or commercial heating loops. Sewage sampling and industrial liquid transfer: suitable for larger flow handling where low noise and stable operation are required. Hot water recirculation in plant systems: supports continuous circulation tasks while protecting the system during temporary outlet blockages. Practical notes The pump is designed to keep operating if the outlet is blocked; in that case the reflux valve opens and water circulates inside the pump. Choose the power and flow configuration that matches system head and required flow rate to achieve the stated maximum lift and flow performance. This pump is a practical choice where continuous circulation, variable flow capacity, and quiet operation are needed for heating and industrial liquid transfer applications.