High flow velocities encountered in fluid handling equipment adds to the quick degradation of the pump and corresponding components. In some cases, high fluid velocities occur due to high pressure to low pressure leakage. In other cases, silts and gravels can be carried in the fluid stream with the resultant factor accelerating erosion and material loss.
The effects of moving abrasive liquids or materials are similar to corrosive liquids. Handling abrasive liquids is a difficult application for any pump, because the abrasive particles promote pump wear. Both corrosion and abrasion remove some of the material the pump itself is constructed of. Heavy wear systems, such as sludge or sewage pumps are particularly prone to abrasion wear.