The Witte 400 vibrating fluid bed dryer-cooler-classifier from The Witte Co., Washington, N.J. reduces the temperature of plastic pellets from 100 C (212 F) to 50 C (122 F) at up to 5000 lb/hr. using ambient air. Integrating drying, cooling, dedusting and classifying into a single, compact unit, the unit removes residual moisture that may condense during packaging, separates -20 mesh fines to pass the “hand test,” removes -10 mesh chips, and then removes oversized material, yielding consistently on-spec pellets for clog-free bag filling and packaging.
The Witte 400 is said to be ideal for processing nylons, polyesters, polyurethanes, PS, PE, PP, PVC, and other commodity and engineering resins. The self-contained plastic pellet system opens easily to expose the interior for cleaning and inspection and is available with a motorized, hands-free safety hoist, a choice of steam, gas, or electric process air heating systems and a variety of custom options.