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Hitachi

Hitachi Industrial Products, Ltd.Pump system

High-speed, compact pumps

Our compact and lightweight pumps have higher speeds and higher flow velocities.

Image: Image of a conventional pump and a high-speed pump
Image of a conventional pump and a high-speed pump

Effects

The main body of the pump can be made more compact and lighter, which can reduce the base price for the pump and construction cost.

(In-house comparison)

Improvement points

By increasing the pump specific speed and rotation speed, the impeller diameter can be reduced and, as the result, the pump is lighter and more compact.
Increasing the rotation speed of the pump may make cavitation performance worse compared to the conventional type, and the impeller may need to be submerged deeper. Also, since the pump efficiency is lower than the conventional pump, the motor has a larger output. Since the shut-off shaft power is higher than the conventional pump, the Q-H characteristics of the pump must be thoroughly investigated within the operational range.