Conair has debuted two new powder-conveying units for handling PVC and other powders down to one micron in size, and dusty regrind as well.
Available in a PR (powder receiver) model, for use in central vacuum systems, and a self-contained PM model with integral vacuum motor, they both offer improved conveying and filtration rates.
The integral-motor version is ideal for conveying material from bins directly to a moulding machine or extruder. The PM motor loaders come in three sizes, with conventional DC brush or brushless motors. They can transport up to 454kg/hr over distances up to 15.25m.
The PR powder receivers come in five different sizes ranging in volume from (4 to 85l) and accommodate line sizes up 101mm.
Doug Brewster, Conair Conveying product manager, says: “Conventional loaders, which rely on screens to separate material from conveying air, work very well with virgin pellets but when powdered material is being transported, screens can become laden with accumulated dust, decreasing the performance of the conveying system.
"The same thing can happen with dusty regrind and, as plastics processors attempt to use more reclaimed material – either for environmental or economic reasons – the issue becomes more acute. The new powder receivers and motor loaders were developed for these applications.”
Both units operate the same way. Air and material are drawn into the receiver by the central vacuum pump.