CMI Novacast, Inc.

The CMI Novacast PG series electromagnetic pumps are used for transferring molten aluminum or zinc in a controlled and non-turbulent manner for low pressure filling of sand, permanent or semi-permanent molds. The pumps can also be used as a metering device for filling of molds via gravity. CMI Novacast electromagnetic pumps last longer in the furnace, cost less to maintain and operate, and deliver more consistent, precise, and better performance than any other pumps in their class.

CMI Novacast's LA series 3-phase linear annular induction pumps are constructed of stainless steel for pumping metals such as Na, NaK, K, and others. Some metals may require that the pump be made from other materials. The metal flows through the annular space between two concentric tubes, the inner of the two containing a magnetic core, through which the lines of a moving radial magnetic field are looped. The field is developed by a 3-phase stator around the tube. The flow of induced currents is circular, within the annular space, cutting the lines of the field. An axially exerted force then results, moving the liquid metal through the pump. Thermocouples are provided to monitor temperature, and cooling is provided to prevent damage to the components during operations up to 600° C. The absence of moving parts within the pumped liquid eliminates the need for seals and bearings that are found in conventional mechanical pumps, thus minimizing leaks, maintenance, and repairs, and improves reliability.

The CMI Novacast CA series of electromagnetic pumps are typically made of stainless steel. Force is imparted to the metal in the pump according to the Left Hand Rule for motors, where if there is a current carrying conductor that is in a magnetic field, the conductor experiences a force which is perpendicular to the flow of current and the magnetic flux.