Slurry pump Volute Liner is an important wear part of slurry pumps. It forms a slurry pump chamber with throat bush and frame plate liner insert where the slurry would flow through them. Slurry volute Liner is a curved funnel increasing in area to the discharge port. It is often used with slurry pump impeller. As the area of the cross-section increases, the volute reduces the speed of the liquids and increases the pressure of the liquids. The main purposes of a volute liner is to help balance the hydraulic pressure on the shaft of the slurry pump.