CHARLES ROSS & SON CO.: Expanded Planetary Mixer Line
Charles Ross & Son Co. has expanded its PDDM planetary mixer line to include larger working capacities up to 750 gal. The PDDM is a multi-agitator mixer featuring two planetary stirrer blades and two high-speed disperser shafts. Designed for highly viscous and highly filled applications, the hybrid planetary mixer/disperser reportedly can quickly incorporate large amounts of dry ingredients into thick or sticky liquid, and apply intense shear to achieve a smooth and uniform consistency.
The 300-gal model reportedly is equipped with four saw-tooth blades that spin on high-speed shafts while revolving around the vessel, accelerating solids dispersion and particle size reduction. Two helical planetary stirrers rotate at lower speeds to constantly turnover batch material, ensuring that product is evenly mixed and heated regardless of flow characteristics. A sidewall scraper arm enhances material and heat transfer around the vessel periphery. At any stage of the mixing cycle, operators can easily fine-tune the observed flow turbulence and shear because the stirrers and dispersers are independently driven by two different motors. The PDDM reportedly is rated for vacuum operation up to 29.5-in.Hg and includes a jacketed change-can vessel, sight/charge ports on the cover and an automated lift for raising/lowering the agitators. This mixer can be supplied with a discharge system for transfer of the finished product within minutes.