Cavitation

Cavitation occurs when there is a temporary drop in liquid pressure below the vapor pressure. This happens in the area of the highest flow velocity, i.e., in the throttling zone between the plug and seat ring, resulting in vapor bubbles. The collapse of these vapor bubbles produces shock waves that can cause erosion damage when they impact the valve body and internal components. Cavitation can be reduced by using multi-stage trims. Additionally, hardened materials can be employed to increase service life.