The 4320 low-speed, submersible wastewater mixer from Flygt - a Xylem brand has built-in speed regulation to optimize control over the mixer’s thrust for continuous process results and lower energy consumption. Coupling an integrated drive with a synchronous motor, the mixer eliminates the need for an external variable-frequency drive. Once installed, the mixer thrust or speed can be altered to that facility’s specific conditions, reducing energy consumption. Applications include activated sludge treatment, sludge holding tanks and digesters, as well as biogas applications. Mixers have a variable speed of up to 70 rpm and are available in two- or three-blade models with a range of propellers from 4.6 to 8.2 feet in diameter. The backswept design ensures clog-free operation. Speed controls can be adjusted using a small operator panel mounted tank-side or in the control room for easy accessibility. Remote communication enables the mixer to be accessed from a central control system. 855/995-4261; www.xylem.com/treatment.