The PMS Mixer® utilizes a conical mixing bowl design, ensuring complete separation of product contact parts from driving components. All product-contacting parts are constructed of high-quality stainless steel SUS 316, and are mirror polished to maintain hygienic standards. A pneumatically operated seal between the mixing bowl and lid, along with air purge labyrinth seals between the bowl and shafts, provides a dust-tight operation.

Raw materials can be fed into the mixer either manually through the fully open lid, or automatically through suitable inlets on the lid. The conical mixing bowl structure helps prevent adhesion of raw materials and ensures a smoother flow inside the bowl. The main agitator, located at the base of the mixer, works in conjunction with the high shear chopper located laterally in the mixer wall. These rotating elements intensively force the product to move in both vertical and horizontal planes, resulting in a homogeneously mixed product in a short period of time.

The incorporation of binder through the lid hopper moistens and agglomerates pre-mixed materials. The chopper then breaks these material agglomerations into fine and uniform granules. For process reproducibility, mixing time or mixing power consumption can be characterized by the main agitator and chopper motor current, allowing for accurate process endpoint determination. The finished product is discharged through a pneumatic valve, using centrifugal force, into a product container or directly into a Fluid Bed Dryer bowl.