Sometimes desander & desilter are combined as high efficient mud cleaner.

Desanders are installed on top of the mud tank following the shale shaker and the degasser, but before the desilter.

A centrifugal pump would sucks the shaker-treated fluids up to the desilter or mud cleaner for further purification.

Nomally the shale shaker and vecuum degasser and desander are mounted together on the same mud tank as the first tank at the oilfield, while desilter and centrifuge on the second tank.

A mud is fed to the inlet of the hydrocyclone (desander and/or desilter) to separate particles and the underflow passes to the fine screen mesh where in particles larger than barite are discarded and thrown away.