Charles Ross & Son Company, a manufacturer of specialty mixing, blending, drying and dispersion equipment, recently completed its 3000th Double Planetary Mixer. Shown is the 150-gallon Sanitary Double Planetary Mixer equipped with classic rectangular stirrer blades, hydraulic lift, sealed and purged gearbox, custom sight/charge ports, CIP spray nozzles and interchangeable mix cans with flush plug valve. Since the company introduced the world’s first Double Planetary Mixer in the mid-1940s, it has led the industry in many other pioneering technologies including vacuum mixing, integrated discharge systems, orbiting temperature probes, helical high viscosity blades and hybrid planetary dispersers. Today, Ross Double Planetary Mixers are commonly used for preparing viscous formulations, wet granulations and abrasive slurries. These machines are also utilized as vacuum mixer/dryers for anything from pharmaceutical products to extremely dense metal powders.