Grundfos MAGNA3 50-80 GF 240 230V High Efficiency Circulator Pump. The MAGNA3 Series Circulator Pumps are manufactured with communication equipment and motors with electronic speed control. MAGNA3 Pumps are designed to automatically analyze the heating system for continuous adjustment to optimize the systems output, and minimize energy consumption. This Grundfos MAGNA3 50-80 GF 240 230V High Efficiency Circulator Pump is extremely flexible and reliable in both AC cooling systems and domestic hot-water systems. This Pump also features low noise levels, long pump life and minimal maintenance requirements. Other key benefits of the Grundfos MAGNA3 50-80 GF 240 230V High Efficiency Circulator Pump include proportional/constant pressure control, a control panel with self-explanatory push-buttons, constant curve speed duty, an insulated shell supplied with single-head pumps and a wide temperature range where the liquid temperature and the ambient temperature are independent of each other.