The DE-7200 variable frequency drive (VFD) centrifuge offers the ultimate flexibility in system control, permitting it to handle a wide range of feed slurries. New technology has been combined with durability and reliability in a product that is easy to operate and fully adjustable. The result is a rugged yet technically advanced centrifuge designed for any application in virtually every environment.
Features and benefits
- Electrical control cabinet configured for local/remote, interior/exterior mounting configurations
- Higher operating torque capacity
- Higher throughput effienciency with direct feed pump control
- Automatic cleaning cycle initiated during routine shutdown
- Rotating assembly speed feedback sensor for precise control and overspeed protection
Feed rates up to 500 GPM achieved through innovative bowl and conveyor sections, redesigned discharge ports and a rugged drive system. Bowl and conveyor are manufactured from high tensile strength carbon steel.
Liquid and solid bowl heads are machined from forgings while the bowl and conveyor hub are constructed from centrifugally cast stock. The drive system consists of two explosion-proof inverter duty motors.
Automatic load sensing and feed pump control enable automated performance optimisation. The bowl assembly can be operated up to 3000 RPM. The conveyor is capable of differential speeds from 1 to 90 RPM accommodating low levels of agitation and rapid solids removal. The operational methodology of the VFD requires the PLC to have complete control over the feed pump through a third AC drive. This enables feed pump control to be automatic or manual.
Automatic control maximises centrifuge throughput by employing a proportional-integral-derivative (PID) loop. This increases feed pump output to the centrifuge until the operator input torque setpoint is reached on either the bowl or the conveyor drive motors. If properties of the feed slurry change, the PID loop will dynamically adjust pump output to maintain the torque setpoint. This enables users to safely and effectively operate and monitor this machine.