There are types of material whose prime function is not the separation of solid particles from fluids, but in whose use such separation does occur. They operate by different physical processes from filtration (and from each other), and are used for different purposes.

The two major branches of physical separations technology, filtration and sedimentation, work by quite different mechanisms.

The Self-Cleaning Strainer is motorized unit designed for the continuous removal of suspended solids from intake, water treatment and waste water treatment.