Particle Size Distribution (PSD), Total Suspended Solids (TSS), and Specific Gravity (SG) are the three primary process variables that dictate which type of vacuum filter will work best.
As a rule of thumb, high PSD, high TSS, and high SG favor use of Disc Vacuum Filters.
Medium PSD, medium TSS, and medium SG favor use of Horizontal Belt Filters.
Low PSD, low TSS, and low SG favor use of Rotary Drum Vacuum Filters.