Decanter Centrifuge Manufacturer A Decanter Centrifuge is a mechanical device used for the separation of solids from slurries in many industrial processes. In oilwell drilling, a centrifuge is used to condition drilling fluids by dividing the fluid into high-density and low-density streams, permitting one to be separated from the other. The division is achieved by accelerated sedimentation. As the drilling fluid is passed through a rapidly rotating bowl, centrifugal force moves the heavier particles to the bowl wall, where they are scraped toward the underflow (heavy slurry) discharge ports by a concentric auger, also called a scroll or conveyor, which rotates at a slightly slower rate than the bowl. The separation of the heavier particles divides the processed fluid into two streams: the heavy phase, also called the under- flow or cake; and the lighter phase, which is called the overflow, light slurry, effluent, or centrate.