Ross Planetary Mixers are now offered with newly improved sealed and purged gearbox assemblies for sensitive applications requiring the tightest protection against contamination. Two rectangular planetary blades rotate on their own axes, while they orbit the mix vessel on a common axis. This mixing action is ideal for moving viscous fluids or wet granulations, according to the manufacturer. 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 are likewise prevented from entering the purged gearbox. These mixers also feature a gable-roofed bonnet to avoid dust or water collection. All ports and connections are tri-clamp design. Atomizing spray nozzles are installed on dedicated ports for controlled and spill-free addition of liquid raw materials into the batch.