... of fans, pumps, compressors, mills, conveyors and lifts 1. Variable Frequency Drive characteristicsVFD is a masterpiece of outstanding performance and ... two separate channels of auxiliary power supplies of single phase AC or DC for the controller from the user. The ... Slurry pump. Metal: Dust air fan, Primary air fan, Pump, Compressor. Oil & Gas: Oil transferring pump, Water injecting pump, Electric ...