Ross Planetary Mixers are now offered with improved sealed and purged gearbox assemblies for sensitive applications requiring tight protection against contamination. Shown are Ross 40-gal double planetary mixers designed for sanitary formulations. Two rectangular planetary blades rotate on their own axes while they orbit the mix vessel on a common axis. This mixing action is reportedly ideal for moving viscous fluids or wet granulations.
The stainless steel, heavy-duty sealed gearbox housing includes a sloped cover to prevent contamination and pooling of condensed liquids. Solvent vapors and airborne particles can then be prevented from entering the purged gearbox. These mixers also feature a gable-roofed bonnet that can avoid dust or water collection. All ports and connections are sanitary tri-clamp design. Atomizing spray nozzles are installed on dedicated ports for the controlled and spill-free addition of liquid raw materials into the batch.