A complete line of high-performance, four-bed dryers (HP4-X) are designed specifically for the medical products industry. Because cleanliness is critical in this field, extra precautions have been taken to eliminate contamination from rust or corrosion during the drying process. Stainless steel components are used throughout the HP4-X Series in all areas of contact with the plastic or desiccant. The stainless steel material hoppers offer a smooth interior to eliminate catch-points for materials therefore eliminating cross-contamination when changing materials. To further protect the resin purity, the HP4-X Series dryers are equipped with a HEPA filter for high-efficiency filtration of air to the hopper.