SJE-Rhombus (Detroit Lakes, MN) introduces the VARIOspeed variable frequency drive (VFD) for constant pressure control applications. As the flow and head conditions change in the pumping system, the VARIOspeed VFD is able to automatically control the pump speed and maintain a constant discharge pressure. The desired set pressure is set using the user friendly VFD keypad, and the pressure transducer measures and pumps discharge pressure. The VARIOspeed VFD is available from 5HP to 150HP @ 208-240V and 5HP to 250HP @380-480V, single-phase or three-phase supply voltage. Built-in features include P.I.D. control, energy optimization control, adjustable electronic overload, automatic system restart, high and low pressure alarms, and more.
Visit www.sjerhombus.com to learn more.