Grundfos MAGNA1 D 50-120F (280) Variable Speed Twin Head Circulator 240V

The Grundfos MAGNA1 D 50-120F (280) is an A‑rated, EuP‑ready variable‑speed twin‑head circulator designed for circulating water in heating and domestic hot‑water systems. It supports variable flows and can be forced to the maximum curve by an external signal for hot‑water priority applications such as solar‑heating systems.

• Variable‑speed twin‑head design with nine light fields to indicate pump setting and easy selection of pump curves.
• Three proportional‑pressure, three constant‑pressure and three fixed‑speed curves available to match system requirements.
• Suitable for heating systems, main pumps, mixing loops and heating and air‑conditioning applications.
• Low noise level, maintenance‑free construction and cast‑iron material for durability.
• Operating liquid temperature range −10 to 110 °C; 50 mm flanged connections with 280 mm port‑to‑port dimension for the D50‑120 model.
• Electrical and performance data: 240 V 1Ph 50 Hz, motor input range 20.71–534 W, full load current 0.22–2.37 A, max flow 45 m3/h, max head 12 m.

Unit dimensions and service details are supplied with the product: overall weight 42.0 kg, nominal dimensions 280 mm (h) × 517 mm (w) × 379 mm (d), and a 2‑year manufacturer warranty. The MAGNA1 D50‑120F (280) balances selectable control curves and low lifecycle energy use for systems that require reliable circulation at variable demand.