Itseimeviä

Itseimeviä is a Finnish term that translates to "self-priming" in English. It is commonly used in the context of pumps, referring to their ability to draw fluid into the pump casing and impeller without requiring manual pre-filling with the liquid being pumped. This is a crucial characteristic for many pump applications, particularly when the pump is located above the liquid level or when the liquid is difficult to access.

Self-priming pumps achieve this capability through various design mechanisms. One common method involves incorporating a chamber or reservoir within the pump housing that holds a reserve of liquid. When the pump starts, this retained liquid is circulated, creating a vacuum that draws air from the suction line. As the air is expelled, the liquid level in the suction line rises, eventually filling the pump casing and allowing normal pumping operation to commence. Another approach uses specially designed impellers and internal passages to create the necessary suction effect.

The advantage of self-priming pumps lies in their operational convenience and reliability, especially in situations where manual priming would be impractical or time-consuming. They are widely used in applications such as drainage, wastewater management, irrigation, and industrial processes where consistent and automatic operation is essential. The ability to start pumping immediately without external intervention makes them a practical choice for many scenarios.