Circle-Throw Vibrating Equipment is a shaker or a series of shakers as to where the drive causes the whole structure to move.  The structure extends to a maximum throw or length and then contracts to a base state.  A pattern of springs are situated below the structure to where there is vibration and shock absorption as the structure returns to the base state.
This type of equipment is used for very large particles, sizes that range from pebble size on up to boulder size material.  It is also designed for high volume output. As a scalper, this shaker will allow oversize material to pass over and fall into a crusher such a cone crusher, jaw crusher, or hammer mill.  The material that passes the screen by-passes the crusher and is conveyed and combined with the crush material.
Also this equipment is used in washing processes, as material passes under spray bars, finer material and foreign material is washed through the screen.  This is one example of wet screening.