The Chemineer Clean Sweep mixing vessel provides a hermetically sealed environment with no rotating shaft seal (mechanical seal). The mixer features an FDA/USP Class VI elastomeric seal. It is suitable for low-shear, high-purity mixing applications and accommodates mixing at low-liquid levels. The mixer has an impeller with specially shaped blades that reach the bottom and provide global mixing through the vessel. The company says the mixer eliminates particle shedding and product contamination.