Cavitation can be damaging to the pump components as well as other piping and system-related parts. Understanding cavitation and how it can be controlled is beneficial to any pump user.
Suppose the droplet enters the inlet of the pump at a pressure slightly above the vapor pressure. Next, the droplet happens to run into the leading edge of the impeller blade, cutting the droplet into two pieces. Half of the drop travels into the impeller channel on the positive-pressure side, where the pressure increases quickly. The other half-drop travels into the low-pressure side, where the pressure is reduced below the vaporization pressure.