en.Wedoany.com Reported - Charles Ross & Son Co. (Ross Mixers, Hauppauge, NY) has introduced the Model PDDM-10 Planetary Dual Disperser, a mixing unit suitable for pilot-scale applications. This equipment provides high shear and controlled planetary stirring under vacuum conditions, enabling rapid dispersion of solids to produce bubble-free, high-quality pastes, slurries, gels, and putties. Additionally, the unit can handle powder blending, granulation, and vacuum drying operations. The maximum batch processing capacity is 12 gallons (12 g), with a total capacity of 15 gallons (15 g).

The drive system features an independently controlled dual-agitator design, combining low-speed planetary stirring with high-speed shearing to achieve maximum mixing efficiency. Two stainless steel high-viscosity planetary stirrers, driven by a 5-hp motor, provide thorough turnover of thick and high-viscosity materials. Working in conjunction are two high-speed dispersers, powered by a 15-hp motor with a speed range of 500 to 3,540 rpm, ensuring rapid powder incorporation and effective deagglomeration.

The mixing process can be conducted under vacuum up to 29.5 inches of mercury, helping to reduce air entrapment and enhance finished product quality. The unit is equipped with a stainless steel Type 304 vacuum hood featuring two 3-inch sight/charge ports; this hood is fully removable for easy operation and cleaning.

The equipment utilizes a change-can design, accommodating interchangeable mixing vessels. These vessels can be equipped with heating or cooling jackets, thermowells, and user-preferred valve styles as needed. A removable sidewall scraper with replaceable PTFE blades is mounted on the planetary gearbox, continuously scraping the vessel's inner wall to improve batch uniformity and heat transfer efficiency.

The unit is equipped with an air or oil hydraulic lift system and two-hand safety controls for raising and lowering the mixing head. Safety limit switches prevent operation if the vessel is not properly positioned. The operator panel is customizable and typically includes a touchscreen for independent agitator control, speed and cycle time displays, vacuum pump control, load monitoring, and temperature display. Standard safety features include motor protection, a main disconnect switch with lockout capability, and an emergency stop button.

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