Traditional fans, pumps regulate the flow regulator valve size is relying on controlled, in fact this adjustment method of operating extremely inconvenient, and can not guarantee a constant supply pressure, energy-saving effect is poor. Today most of the factories, companies have recognized the application of the drive does reduce energy consumption. Cost savings, especially in re-power fans, water pump energy-saving effect is more significant. 1) H3 series inverter water pump for energy saving has a simple structure, easy transformation, energy-saving effect, short payback period characteristics. 2) After using the drive, the pump can be soft start soft stop, reducing equipment mechanical impact, extended equipment life, reduce equipment maintenance costs. 3) Since the average pump speed decreases, the average torque during operation is reduced reason, blades, impeller wear is also greatly reduced. Maintenance costs, labor, lost production is greatly reduced.