Pumpdrift

Pumpdrift is a term used to describe a phenomenon observed in certain types of fluid pumping systems, particularly those involving centrifugal pumps. It refers to the gradual and often unintended change in the pump's operating point over time. This shift can manifest as a decrease in flow rate, an increase in head, or a combination of both, even when the system's resistance characteristics remain constant.

Several factors can contribute to pumpdrift. Wear and tear on the pump's impeller and casing are common culprits, leading to reduced efficiency and altered performance curves. Fouling or blockage within the pump or the associated piping can also impede flow and cause the operating point to shift. Changes in the fluid being pumped, such as variations in viscosity or the presence of dissolved gases, can also influence pump behavior.

The consequences of pumpdrift can range from minor inefficiencies to significant operational problems. Reduced flow rates may impact production processes or the ability to meet demand. Conversely, an unexpected increase in head can over-pressurize downstream equipment, potentially leading to damage. Early detection and mitigation of pumpdrift are crucial for maintaining system reliability and preventing costly downtime. Regular monitoring of pump performance parameters like flow, pressure, and power consumption can help identify these gradual shifts before they become critical issues. Maintenance strategies, including scheduled inspections and impeller refurbishment, are often employed to address the underlying causes of pumpdrift.