New high-efficiency mixers for sludge handling
The AmaProp mixers (photo) are used for applications in handling sludge and biological wastewater treatment. The electric drives are either IE5 Ultra Premium Efficiency synchronous reluctance motors or IE3 Premium Efficiency asynchronous motors with ratings from 0.85 to 20.0 kW. Unlike conventional synchronous motors, the IE5 synchronous reluctance motors are made without any magnetic materials. The shaft sealing is performed by two bi-directional mechanical seals in tandem arrangement with a liquid reservoir. The latter is filled with ecologically acceptable white oil. An oil sensor fitted at the mating ring of the mechanical seal triggers an alarm if any damage occurs to the mechanical seals. As standard, the motors are equipped with maintenance-free bearings and temperature sensors to protect the winding against overheating. They are also fitted with leakage sensors. Users can order additional sensor packages to monitor the bearing temperature or vibrations, for example. The glass-fiber-reinforced two- or three-blade epoxy-resin propellers are as lightweight as they are break-proof, with diameters ranging from 800 to 2,600 mm. Hall B1, Stand 227/326 — KSB SE & Co. KGaA, Frankenthal, Germany