Energy consumption in any type of installation, whether for urban purposes, commercial or industrial, is a very important question; therefore, reducing energy consumption is of great importance. It is very important to control the rotational speed of the pumping equipment in accordance with the required consumption or requirement. For closed circuits (closed systems) it is important to ensure the required flow rate while maintaining the proper pressure or working head in centrifugal pumps. This type of control is ideal for installations with changeable curves, where different work processes are required at the same pressure or different process pressures in centrifugal pumps.
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